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Crocanthemum scoparium var. vulgare +
Illustrated  +
Crocanthemum suffrutescens +
Endemic  +
Crocidium multicaule +
Illustrated  +, Endemic  +
Croomia pauciflora +
Illustrated  +, Endemic  +
Croptilon divaricatum +
Illustrated  +, Endemic  +
Croptilon hookerianum +
Endemic  +
Croptilon hookerianum var. graniticum +
Endemic  +
Croptilon hookerianum var. hookerianum +
Endemic  +
Croptilon hookerianum var. validum +
Endemic  +
Crossopetalum ilicifolium +
Illustrated  +
Crossosoma bigelovii +
Illustrated  +
Crossosoma californicum +
Conservation concern  +
Crotalaria avonensis +
Conservation concern  +
Crotalaria incana +
Introduced  +
Crotalaria incana var. incana +
Introduced  +
Crotalaria juncea +
Introduced  +
Crotalaria lanceolata +
Introduced  +
Crotalaria lanceolata subsp. lanceolata +
Weedy  +, Introduced  +
Crotalaria ochroleuca +
Weedy  +, Introduced  +
Crotalaria pallida +
Introduced  +, Illustrated  +
Crotalaria pallida var. obovata +
Weedy  +, Introduced  +, Illustrated  +
Crotalaria purshii +
Endemic  +
Crotalaria retusa +
Weedy  +, Introduced  +
Crotalaria rotundifolia var. linaria +
Endemic  +
Crotalaria rotundifolia var. rotundifolia +
Weedy  +
Crotalaria sagittalis +
Weedy  +
Crotalaria sagittalis var. blumeriana +
Weedy  +
Crotalaria sagittalis var. sagittalis +
Weedy  +
Crotalaria spectabilis +
Weedy  +, Introduced  +, Illustrated  +
Crotalaria trichotoma +
Introduced  +
Crotalaria verrucosa +
Introduced  +
Crotalaria virgulata +
Introduced  +
Crotalaria virgulata subsp. grantiana +
Introduced  +
Croton alabamensis +
Endemic  +
Croton alabamensis var. alabamensis +
Endemic  +
Croton alabamensis var. texensis +
Endemic  +, Conservation concern  +
Croton argenteus +
Introduced  +
Croton argyranthemus +
Illustrated  +
Croton capitatus +
Weedy  +, Endemic  +, Illustrated  +
Croton coryi +
Endemic  +
Croton elliottii +
Endemic  +
Croton fruticulosus +
Illustrated  +
Croton glandulosus var. arenicola +
Endemic  +
Croton glandulosus var. floridanus +
Endemic  +
Croton glandulosus var. pubentissimus +
Endemic  +
Croton glandulosus var. septentrionalis +
Weedy  +, Endemic  +
Croton lindheimeri +
Endemic  +, Illustrated  +
Croton michauxii +
Endemic  +, Illustrated  +
Croton michauxii var. elliptica +
Endemic  +
Croton michauxii var. michauxii +
Endemic  +, Illustrated  +
Croton parksii +
Endemic  +
Croton pottsii var. thermophilus +
Conservation concern  +
Croton setigerus +
Weedy  +
Croton texensis +
Weedy  +, Illustrated  +
Croton wigginsii +
Conservation concern  +
Crupina vulgaris +
Weedy  +, Introduced  +, Illustrated  +
Cryphaea glomerata +
Endemic  +, Illustrated  +
Cryphaea nervosa +
Endemic  +, Illustrated  +
Cryphaea ravenelii +
Endemic  +
Crypsis alopecuroides +
Introduced  +
Crypsis schoenoides +
Introduced  +
Crypsis vaginiflora +
Introduced  +
Cryptogramma acrostichoides +
Illustrated  +
Cryptogramma cascadensis +
Endemic  +
Cryptogramma sitchensis +
Endemic  +
Cryptostegia +
Introduced  +
Cryptostegia grandiflora +
Introduced  +, Illustrated  +
Cryptostegia madagascariensis +
Introduced  +
Ctenidium molluscum +
Illustrated  +
Ctenidium schofieldii +
Endemic  +, Illustrated  +
Ctenitis sloanei +
Illustrated  +
Ctenitis submarginalis +
Illustrated  +
Ctenium aromaticum +
Endemic  +
Ctenium floridanum +
Endemic  +
Ctenolepis +
Introduced  +
Ctenolepis cerasiformis +
Introduced  +, Illustrated  +
Cucumis +
Introduced  +
Cucumis anguria +
Introduced  +
Cucumis anguria var. anguria +
Introduced  +
Cucumis anguria var. longaculeatus +
Introduced  +
Cucumis dipsaceus +
Introduced  +
Cucumis melo +
Introduced  +, Illustrated  +
Cucumis melo subsp. agrestis +
Introduced  +, Illustrated  +
Cucumis melo subsp. melo +
Introduced  +, Illustrated  +
Cucumis metuliferus +
Introduced  +
Cucumis myriocarpus +
Introduced  +
Cucumis sativus +
Introduced  +
Cucumis sativus var. sativus +
Introduced  +
Cucurbita digitata +
Illustrated  +
Cucurbita ficifolia +
Introduced  +
Cucurbita maxima +
Introduced  +
Cucurbita melopepo +
Illustrated  +
Cucurbita melopepo subsp. melopepo +
Illustrated  +
Cucurbita melopepo subsp. texana +
Illustrated  +
Cucurbita melopepo var. melopepo +
Endemic  +
Cucurbita melopepo var. ozarkana +
Endemic  +
Cucurbita melopepo var. texana +
Endemic  +, Illustrated  +
Cucurbita moschata +
Introduced  +
Cucurbita okeechobeensis +
Conservation concern  +
Cucurbita okeechobeensis subsp. okeechobeensis +
Conservation concern  +
Cucurbita pepo +
Introduced  +
Cucurbita pepo subsp. pepo +
Introduced  +
Cuniculotinus gramineus +
Illustrated  +, Endemic  +
Cupressus bakeri +
Illustrated  +, Endemic  +, Conservation concern  +
Cupressus goveniana +
Endemic  +
Cupressus guadalupensis +
Conservation concern  +
Cupressus guadalupensis var. forbesii +
Conservation concern  +
Cupressus macnabiana +
Illustrated  +, Endemic  +
Cupressus macrocarpa +
Endemic  +, Conservation concern  +
Cupressus sargentii +
Endemic  +
Curcuma zedoaria +
Introduced  +, Illustrated  +
Cuscuta +
Y  +
Cuscuta americana +
Weedy  +
Cuscuta approximata +
Weedy  +, Introduced  +
Cuscuta approximata var. approximata +
Weedy  +, Introduced  +
Cuscuta azteca +
Y  +
Cuscuta boldinghii +
Weedy  +
Cuscuta brachycalyx +
Endemic  +, Conservation concern  +
Cuscuta californica +
Weedy  +
Cuscuta californica var. apiculata +
Endemic  +, Conservation concern  +
Cuscuta californica var. californica +
Weedy  +
Cuscuta californica var. papillosa +
Weedy  +, Endemic  +
Cuscuta campestris +
Weedy  +, Illustrated  +
Cuscuta cephalanthi +
Weedy  +, Illustrated  +, Endemic  +
Cuscuta chinensis +
Y  +
Cuscuta chinensis var. applanata +
Y  +
Cuscuta compacta +
Weedy  +, Illustrated  +, Endemic  +
Cuscuta coryli +
Weedy  +, Endemic  +
Cuscuta cuspidata +
Weedy  +, Endemic  +
Cuscuta dentatasquamata +
Conservation concern  +
Cuscuta denticulata +
Weedy  +
Cuscuta draconella +
Endemic  +
Cuscuta epilinum +
Weedy  +, Introduced  +
Cuscuta epithymum +
Weedy  +, Introduced  +, Illustrated  +
Cuscuta epithymum var. epithymum +
Weedy  +, Introduced  +, Illustrated  +
Cuscuta erosa +
Weedy  +
Cuscuta europaea +
Weedy  +, Introduced  +
Cuscuta exaltata +
Weedy  +, Endemic  +
Cuscuta glabrior +
Weedy  +
Cuscuta glomerata +
Weedy  +, Endemic  +
Cuscuta gronovii +
Weedy  +, Illustrated  +
Cuscuta gronovii var. calyptrata +
Endemic  +, Conservation concern  +
Cuscuta gronovii var. gronovii +
Weedy  +, Illustrated  +
Cuscuta gronovii var. latiflora +
Weedy  +, Endemic  +
Cuscuta harperi +
Endemic  +, Conservation concern  +
Cuscuta howelliana +
Weedy  +, Endemic  +
Cuscuta indecora +
Weedy  +, Illustrated  +
Cuscuta indecora var. attenuata +
Illustrated  +, Endemic  +, Conservation concern  +
Cuscuta indecora var. indecora +
Weedy  +, Illustrated  +
Cuscuta indecora var. longisepala +
Weedy  +, Illustrated  +
Cuscuta japonica +
Introduced  +, Illustrated  +
Cuscuta japonica var. formosana +
Introduced  +
Cuscuta japonica var. japonica +
Introduced  +, Illustrated  +
Cuscuta jepsonii +
Endemic  +, Conservation concern  +
Cuscuta legitima +
Y  +
Cuscuta leptantha +
Weedy  +
Cuscuta liliputana +
Endemic  +
Cuscuta mitriformis +
Conservation concern  +
Cuscuta nevadensis +
Weedy  +, Endemic  +
Cuscuta obtusiflora +
Weedy  +
Cuscuta obtusiflora var. glandulosa +
Weedy  +
Cuscuta occidentalis +
Weedy  +, Endemic  +
Cuscuta odontolepis +
Conservation concern  +
Cuscuta pacifica +
Y  +
Cuscuta pacifica var. pacifica +
Y  +
Cuscuta pacifica var. papillata +
Endemic  +, Conservation concern  +
Cuscuta pentagona +
Weedy  +, Illustrated  +, Endemic  +
Cuscuta plattensis +
Endemic  +, Conservation concern  +
Cuscuta polygonorum +
Weedy  +, Endemic  +
Cuscuta rostrata +
Weedy  +, Endemic  +
Cuscuta runyonii +
Weedy  +, Endemic  +
Cuscuta salina +
Weedy  +, Illustrated  +
Cuscuta squamata +
Weedy  +
Cuscuta suaveolens +
Weedy  +, Introduced  +
Cuscuta subg. Cuscuta +
Y  +
Cuscuta subg. Grammica +
Y  +
Cuscuta subg. Monogynella +
Y  +
Cuscuta subinclusa +
Y  +
Cuscuta suksdorfii +
Endemic  +
Cuscuta tuberculata +
Weedy  +
Cuscuta umbellata +
Weedy  +
Cuscuta umbellata var. umbellata +
Weedy  +
Cuscuta umbrosa +
Weedy  +, Endemic  +
Cuscuta warneri +
Endemic  +, Conservation concern  +
Cusickiella douglasii +
Illustrated  +, Endemic  +
Cusickiella quadricostata +
Endemic  +, Conservation concern  +
Cutandia memphitica +
Introduced  +
Cyanthillium cinereum +
Introduced  +, Illustrated  +
Cyclachaena xanthiifolia +
Illustrated  +, Endemic  +
Cycladenia humilis +
Illustrated  +, Endemic  +
Cycladenia humilis var. humilis +
Illustrated  +, Endemic  +
Cycladenia humilis var. jonesii +
Endemic  +, Conservation concern  +
Cycladenia humilis var. venusta +
Endemic  +
Cyclanthera dissecta +
Endemic  +
Cyclanthera naudiniana +
Endemic  +, Illustrated  +
Cyclanthera stenura +
Endemic  +
Cyclodictyon varians +
Illustrated  +
Cycloloma atriplicifolium +
Weedy  +, Illustrated  +
Cyclopogon cranichoides +
Illustrated  +
Cydonia +
Introduced  +
Cydonia oblonga +
Introduced  +, Illustrated  +
Cylindropuntia abyssi +
Endemic  +
Cylindropuntia acanthocarpa +
Illustrated  +
Cylindropuntia acanthocarpa var. acanthocarpa +
Illustrated  +
Cylindropuntia acanthocarpa var. coloradensis +
Illustrated  +
Cylindropuntia acanthocarpa var. major +
Illustrated  +
Cylindropuntia acanthocarpa var. thornberi +
Endemic  +
Cylindropuntia bigelovii +
Illustrated  +
Cylindropuntia bigelovii var. bigelovii +
Illustrated  +
Cylindropuntia californica +
Illustrated  +
Cylindropuntia californica var. californica +
Illustrated  +
Cylindropuntia californica var. parkeri +
Illustrated  +
Cylindropuntia davisii +
Illustrated  +, Endemic  +
Cylindropuntia fulgida +
Illustrated  +
Cylindropuntia fulgida var. fulgida +
Illustrated  +
Cylindropuntia fulgida var. mamillata +
Illustrated  +
Cylindropuntia imbricata +
Illustrated  +
Cylindropuntia imbricata var. argentea +
Endemic  +, Conservation concern  +
Cylindropuntia imbricata var. imbricata +
Illustrated  +
Cylindropuntia leptocaulis +
Illustrated  +
Cylindropuntia ramosissima +
Illustrated  +
Cylindropuntia whipplei +
Endemic  +
Cymbalaria +
Introduced  +
Cymbalaria muralis +
Weedy  +, Introduced  +, Illustrated  +
Cymbalaria muralis subsp. muralis +
Weedy  +, Introduced  +, Illustrated  +
Cymophyllus fraserianus +
Illustrated  +, Endemic  +
Cynanchum laeve +
Weedy  +, Illustrated  +, Endemic  +
Cynara cardunculus +
Weedy  +, Introduced  +, Illustrated  +
Cynara cardunculus subsp. cardunculus +
Weedy  +, Introduced  +
Cynara cardunculus subsp. flavescens +
Weedy  +, Introduced  +, Illustrated  +
Cyperus acuminatus +
Illustrated  +
Cyperus aggregatus +
Illustrated  +
Cyperus alopecuroides +
Introduced  +, Illustrated  +
Cyperus amabilis +
Illustrated  +
Cyperus articulatus +
W1  +, Illustrated  +
Cyperus bipartitus +
Illustrated  +
Cyperus cephalanthus +
Illustrated  +
Cyperus compressus +
W2  +, W1  +, Illustrated  +
Cyperus croceus +
Illustrated  +
Cyperus cuspidatus +
Illustrated  +
Cyperus dentatus +
Illustrated  +, Endemic  +
Cyperus dentoniae +
Illustrated  +
Cyperus diandrus +
Illustrated  +, Endemic  +
Cyperus difformis +
W2  +, W1  +, Introduced  +, …
Cyperus digitatus +
Illustrated  +
Cyperus dipsaceus +
Illustrated  +
Cyperus distans +
Illustrated  +
Cyperus distinctus +
Illustrated  +
Cyperus drummondii +
Illustrated  +
Cyperus echinatus +
Illustrated  +
Cyperus elegans +
Illustrated  +
Cyperus entrerianus +
Introduced  +, Illustrated  +
Cyperus eragrostis +
Illustrated  +
Cyperus erythrorhizos +
W2  +, W1  +, Illustrated  +
Cyperus esculentus +
W2  +, W1  +, Illustrated  +
Cyperus esculentus var. heermannii +
W2  +, W1  +, Illustrated  +
Cyperus esculentus var. leptostachyus +
Illustrated  +
Cyperus esculentus var. macrostachyus +
W2  +, W1  +, Illustrated  +
Cyperus fendlerianus +
Illustrated  +
Cyperus filicinus +
Illustrated  +, Endemic  +
Cyperus filiculmis +
Illustrated  +, Endemic  +
Cyperus filiformis +
Illustrated  +
Cyperus flavescens +
Illustrated  +
Cyperus flavicomus +
Introduced  +, Illustrated  +
Cyperus floribundus +
Illustrated  +
Cyperus fugax +
Illustrated  +
Cyperus fuligineus +
Illustrated  +
Cyperus fuscus +
Introduced  +, Illustrated  +
Cyperus giganteus +
Introduced  +, Illustrated  +
Cyperus grayi +
Illustrated  +, Endemic  +
Cyperus haspan +
Illustrated  +
Cyperus hermaphroditus +
Illustrated  +
Cyperus houghtonii +
Illustrated  +, Endemic  +
Cyperus hystricinus +
Illustrated  +, Endemic  +
Cyperus involucratus +
Introduced  +, Illustrated  +
Cyperus iria +
W2  +, W1  +, Introduced  +, …
Cyperus laevigatus +
Illustrated  +
Cyperus lancastriensis +
Illustrated  +, Endemic  +
Cyperus lanceolatus +
Illustrated  +
Cyperus lecontei +
W1  +, Illustrated  +, Endemic  +
Cyperus lentiginosus +
Illustrated  +
Cyperus ligularis +
W2  +, Illustrated  +
Cyperus lupulinus +
Illustrated  +, Endemic  +
Cyperus lupulinus subsp. lupulinus +
Endemic  +
Cyperus lupulinus subsp. macilentus +
Illustrated  +, Endemic  +
Cyperus manimae +
Illustrated  +
Cyperus manimae var. asperrimus +
Illustrated  +
Cyperus melanostachyus +
Illustrated  +
Cyperus microiria +
Introduced  +, Illustrated  +
Cyperus mutisii +
Illustrated  +
Cyperus ochraceus +
Illustrated  +
Cyperus odoratus +
W2  +, W1  +, Illustrated  +
Cyperus onerosus +
Illustrated  +, Endemic  +, Conservation concern  +
Cyperus ovatus +
Illustrated  +, Endemic  +
Cyperus owanii +
Introduced  +, Illustrated  +
Cyperus oxylepis +
Introduced  +, Illustrated  +
Cyperus pallidicolor +
Illustrated  +
Cyperus papyrus +
Introduced  +, Illustrated  +
Cyperus parishii +
Illustrated  +, Endemic  +
Cyperus pilosus +
Introduced  +, Illustrated  +
Cyperus planifolius +
Illustrated  +
Cyperus plukenetii +
Illustrated  +, Endemic  +
Cyperus polystachyos +
W2  +, W1  +, Illustrated  +
Cyperus prolifer +
Introduced  +, Illustrated  +
Cyperus prolixus +
Illustrated  +
Cyperus pseudothyrsiflorus +
Illustrated  +
Cyperus pseudovegetus +
W1  +, Illustrated  +, Endemic  +
Cyperus pumilus +
Introduced  +, Illustrated  +
Cyperus reflexus +
Illustrated  +
Cyperus refractus +
Illustrated  +, Endemic  +
Cyperus retroflexus +
Illustrated  +
Cyperus retrofractus +
Illustrated  +, Endemic  +
Cyperus retrorsus +
W2  +, W1  +, Illustrated  +
Cyperus rotundus +
W2  +, W1  +, Illustrated  +
Cyperus sanguinolentus +
Introduced  +, Illustrated  +
Cyperus schweinitzii +
Illustrated  +
Cyperus serotinus +
Introduced  +, Illustrated  +
Cyperus seslerioides +
Illustrated  +
Cyperus spectabilis +
Illustrated  +
Cyperus sphacelatus +
Introduced  +, Illustrated  +
Cyperus sphaerolepis +
Illustrated  +
Cyperus squarrosus +
W2  +, Illustrated  +
Cyperus strigosus +
W2  +, W1  +, Illustrated  +, …
Cyperus surinamensis +
W2  +, W1  +, Illustrated  +
Cyperus tetragonus +
Illustrated  +, Endemic  +
Cyperus thyrsiflorus +
Illustrated  +
Cyperus virens +
W1  +, Illustrated  +
Cyphomeris crassifolia +
Illustrated  +
Cyphomeris gypsophiloides +
Illustrated  +
Cypripedium acaule +
Illustrated  +, Endemic  +
Cypripedium arietinum +
Endemic  +
Cypripedium californicum +
Endemic  +
Cypripedium candidum +
Endemic  +
Cypripedium fasciculatum +
Endemic  +
Cypripedium guttatum +
Illustrated  +
Cypripedium kentuckiense +
Illustrated  +, Endemic  +
Cypripedium montanum +
Endemic  +
Cypripedium parviflorum +
Illustrated  +, Endemic  +
Cypripedium parviflorum var. makasin +
Endemic  +
Cypripedium parviflorum var. parviflorum +
Illustrated  +, Endemic  +
Cypripedium parviflorum var. pubescens +
Illustrated  +, Endemic  +
Cypripedium passerinum +
Illustrated  +, Endemic  +
Cypripedium reginae +
Illustrated  +, Endemic  +
Cypselea humifusa +
Introduced  +, Illustrated  +
Cyrilla racemiflora +
Illustrated  +
Cyrto-hypnum involvens +
Illustrated  +
Cyrtomium falcatum +
Introduced  +, Illustrated  +
Cyrtomium fortunei +
Introduced  +
Cyrtomium fortunei var. fortunei +
Introduced  +
Cyrtomnium hymenophylloides +
Illustrated  +
Cyrtomnium hymenophyllum +
Illustrated  +
Cyrtopodium polyphyllum +
Introduced  +, Illustrated  +
Cystopteris bulbifera +
Illustrated  +, Endemic  +
Cystopteris laurentiana +
Endemic  +
Cystopteris protrusa +
Endemic  +
Cystopteris reevesiana +
Illustrated  +
Cystopteris tenuis +
Illustrated  +, Endemic  +
Cytisus +
Introduced  +
Cytisus multiflorus +
Introduced  +
Cytisus proliferus +
Introduced  +, Illustrated  +
Cytisus scoparius +
Introduced  +, Illustrated  +
Cytisus striatus +
Weedy  +, Introduced  +
D
Dacryophyllum +
Endemic  +
Dacryophyllum falcifolium +
Endemic  +, Illustrated  +
Dactyloctenium aegyptium +
Introduced  +
Dactylorhiza majalis +
Introduced  +, Illustrated  +
Dactylorhiza majalis var. junialis +
Introduced  +, Illustrated  +
Dalbergia ecastaphyllum +
Illustrated  +
Dalbergia sissoo +
Introduced  +
Dalea albiflora +
Illustrated  +
Dalea aurea +
Illustrated  +
Dalea bartonii +
Endemic  +, Conservation concern  +
Dalea brachystachys +
Illustrated  +
Dalea cahaba +
Endemic  +, Conservation concern  +
Dalea candida var. candida +
Endemic  +
Dalea carnea +
Endemic  +
Dalea carnea var. albida +
Endemic  +
Dalea carnea var. carnea +
Endemic  +
Dalea carnea var. gracilis +
Endemic  +
Dalea carthagenensis var. floridana +
Endemic  +, Conservation concern  +
Dalea compacta +
Endemic  +
Dalea compacta var. compacta +
Endemic  +
Dalea compacta var. pubescens +
Endemic  +
Dalea cylindriceps +
Endemic  +
Dalea enneandra +
Illustrated  +, Endemic  +
Dalea feayi +
Endemic  +
Dalea flavescens +
Endemic  +
Dalea foliosa +
Conservation concern  +
Dalea formosa +
Illustrated  +
Dalea gattingeri +
Endemic  +
Dalea hallii +
Endemic  +
Dalea jamesii +
Illustrated  +
Dalea lanata var. lanata +
Endemic  +
Dalea leporina +
Illustrated  +
Dalea multiflora +
Endemic  +
Dalea obovata +
Endemic  +
Dalea ornata +
Endemic  +
Dalea phleoides +
Endemic  +
Dalea phleoides var. microphylla +
Endemic  +
Dalea phleoides var. phleoides +
Endemic  +
Dalea pinnata +
Endemic  +
Dalea pinnata var. adenopoda +
Endemic  +
Dalea pinnata var. pinnata +
Endemic  +
Dalea pinnata var. trifoliata +
Endemic  +
Dalea polygonoides +
Illustrated  +
Dalea purpurea +
Endemic  +
Dalea purpurea var. arenicola +
Endemic  +
Dalea purpurea var. purpurea +
Endemic  +
Dalea reverchonii +
Endemic  +, Conservation concern  +
Dalea sabinalis +
Endemic  +, Conservation concern  +
Dalea scariosa +
Endemic  +
Dalea searlsiae +
Endemic  +
Dalea tentaculoides +
Conservation concern  +
Dalea tenuifolia +
Endemic  +
Dalea tenuis +
Endemic  +
Dalea villosa +
Endemic  +
Dalea villosa var. grisea +
Endemic  +
Dalea villosa var. villosa +
Endemic  +
Dalechampia +
Introduced  +
Dalechampia scandens +
Introduced  +, Illustrated  +
Daltonia splachnoides +
Illustrated  +
Damasonium californicum +
Illustrated  +, Endemic  +
Danthonia compressa +
Endemic  +
Danthonia decumbens +
Introduced  +
Danthonia parryi +
Endemic  +
Danthonia sericea +
Endemic  +
Danthonia unispicata +
Endemic  +
Daphne +
Introduced  +
Daphne laureola +
Introduced  +
Daphne mezereum +
Introduced  +, Illustrated  +
Darlingtonia californica +
Illustrated  +, Endemic  +
Darmera peltata +
Illustrated  +, Endemic  +
Dasiphora fruticosa +
Illustrated  +
Dasistoma +
Endemic  +
Dasistoma macrophyllum +
Endemic  +, Illustrated  +
Dasylirion texanum +
Illustrated  +
Dasylirion wheeleri +
Illustrated  +
Datisca glomerata +
Illustrated  +
Datura ceratocaula +
Introduced  +
Datura discolor +
Weedy  +
Datura ferox +
Weedy  +, Introduced  +
Datura innoxia +
Weedy  +
Datura metel +
Weedy  +, Introduced  +
Datura quercifolia +
Weedy  +
Datura stramonium +
Weedy  +, Introduced  +
Datura wrightii +
Weedy  +, Illustrated  +
Decumaria barbara +
Endemic  +, Illustrated  +
Dedeckera eurekensis +
Illustrated  +, Endemic  +, Conservation concern  +
Deeringothamnus pulchellus +
Conservation concern  +, Endemic  +, Illustrated  +
Deeringothamnus rugelii +
Conservation concern  +, Endemic  +, Illustrated  +
Deinandra arida +
Endemic  +, Conservation concern  +
Deinandra clementina +
Illustrated  +, Endemic  +, Conservation concern  +
Deinandra conjugens +
Conservation concern  +
Deinandra corymbosa +
Endemic  +
Deinandra floribunda +
Conservation concern  +
Deinandra halliana +
Endemic  +, Conservation concern  +
Deinandra increscens +
Illustrated  +, Endemic  +
Deinandra increscens subsp. increscens +
Illustrated  +, Endemic  +
Deinandra increscens subsp. villosa +
Endemic  +, Conservation concern  +
Deinandra lobbii +
Endemic  +
Deinandra minthornii +
Endemic  +, Conservation concern  +
Deinandra mohavensis +
Endemic  +, Conservation concern  +
Deinandra pallida +
Endemic  +
Deinandra paniculata +
Conservation concern  +
Deinandra pentactis +
Endemic  +
Deiregyne confusa +
Illustrated  +
Delairea odorata +
Introduced  +, Illustrated  +
Delonix +
Introduced  +
Delonix regia +
Introduced  +, Illustrated  +
Delosperma litorale +
Introduced  +, Illustrated  +
Delphinium alabamicum +
Conservation concern  +, Endemic  +
Delphinium alpestre +
Conservation concern  +, Endemic  +
Delphinium andersonii +
Endemic  +, Illustrated  +
Delphinium andesicola +
Endemic  +
Delphinium antoninum +
Conservation concern  +, Endemic  +
Delphinium bakeri +
Conservation concern  +, Endemic  +
Delphinium barbeyi +
Endemic  +, Illustrated  +, W2  +
Delphinium basalticum +
Conservation concern  +, Endemic  +
Delphinium bicolor +
Endemic  +, W2  +, Illustrated  +
Delphinium bicolor subsp. bicolor +
Endemic  +, Illustrated  +
Delphinium bicolor subsp. calcicola +
Endemic  +
Delphinium californicum +
Endemic  +
Delphinium californicum subsp. californicum +
Endemic  +
Delphinium californicum subsp. interius +
Conservation concern  +, Endemic  +
Delphinium carolinianum +
Illustrated  +
Delphinium carolinianum subsp. calciphilum +
Endemic  +
Delphinium carolinianum subsp. carolinianum +
Endemic  +, Illustrated  +
Delphinium carolinianum subsp. vimineum +
Illustrated  +
Delphinium carolinianum subsp. virescens +
Endemic  +, Weedy  +
Delphinium decorum +
Endemic  +
Delphinium decorum subsp. decorum +
Endemic  +
Delphinium decorum subsp. tracyi +
Endemic  +
Delphinium depauperatum +
Endemic  +
Delphinium distichum +
Endemic  +, Illustrated  +
Delphinium elatum +
Introduced  +
Delphinium exaltatum +
Endemic  +, Illustrated  +
Delphinium geraniifolium +
Endemic  +
Delphinium geyeri +
Endemic  +, Weedy  +, Illustrated  +
Delphinium glareosum +
Endemic  +, Illustrated  +
Delphinium glaucescens +
Endemic  +
Delphinium glaucum +
Endemic  +, Illustrated  +, W2  +
Delphinium gracilentum +
Endemic  +
Delphinium gypsophilum +
Endemic  +
Delphinium gypsophilum subsp. gypsophilum +
Endemic  +
Delphinium gypsophilum subsp. parviflorum +
Conservation concern  +, Endemic  +
Delphinium hansenii +
Endemic  +, Illustrated  +
Delphinium hansenii subsp. ewanianum +
Conservation concern  +, Endemic  +
Delphinium hansenii subsp. hansenii +
Endemic  +, Illustrated  +
Delphinium hansenii subsp. kernense +
Endemic  +
Delphinium hesperium +
Endemic  +
Delphinium hesperium subsp. cuyamacae +
Conservation concern  +, Endemic  +
Delphinium hesperium subsp. hesperium +
Endemic  +
Delphinium hesperium subsp. pallescens +
Endemic  +
Delphinium hutchinsoniae +
Conservation concern  +, Endemic  +
Delphinium inopinum +
Endemic  +
Delphinium lineapetalum +
Conservation concern  +, Endemic  +, Illustrated  +
Delphinium luteum +
Conservation concern  +, Endemic  +
Delphinium madrense +
Illustrated  +
Delphinium menziesii +
Endemic  +, W2  +, Illustrated  +
Delphinium menziesii subsp. menziesii +
Endemic  +, Illustrated  +
Delphinium menziesii subsp. pallidum +
Endemic  +
Delphinium multiplex +
Endemic  +
Delphinium newtonianum +
Endemic  +, Illustrated  +
Delphinium novomexicanum +
Endemic  +
Delphinium nudicaule +
Endemic  +, Illustrated  +
Delphinium nuttallianum +
Endemic  +, W2  +
Delphinium nuttallii +
Endemic  +
Delphinium nuttallii subsp. nuttallii +
Endemic  +
Delphinium nuttallii subsp. ochroleucum +
Conservation concern  +, Endemic  +
Delphinium parishii subsp. pallidum +
Endemic  +
Delphinium parryi +
Illustrated  +
Delphinium parryi subsp. blochmaniae +
Conservation concern  +, Endemic  +, Illustrated  +
Delphinium parryi subsp. eastwoodiae +
Conservation concern  +, Endemic  +
Delphinium parryi subsp. maritimum +
Illustrated  +
Delphinium parryi subsp. parryi +
Illustrated  +
Delphinium parryi subsp. purpureum +
Conservation concern  +, Endemic  +
Delphinium patens +
Endemic  +
Delphinium patens subsp. hepaticoideum +
Endemic  +
Delphinium patens subsp. montanum +
Endemic  +
Delphinium patens subsp. patens +
Endemic  +
Delphinium polycladon +
Endemic  +
Delphinium purpusii +
Conservation concern  +, Endemic  +
Delphinium ramosum +
Endemic  +
Delphinium recurvatum +
Conservation concern  +, Endemic  +
Delphinium robustum +
Conservation concern  +, Endemic  +, Illustrated  +
Delphinium sapellonis +
Endemic  +
Delphinium scaposum +
Endemic  +, Illustrated  +
Delphinium scopulorum +
Illustrated  +
Delphinium stachydeum +
Endemic  +, Illustrated  +
Delphinium sutherlandii +
Endemic  +
Delphinium treleasei +
Endemic  +, Illustrated  +
Delphinium tricorne +
Endemic  +, Illustrated  +
Delphinium trolliifolium +
Endemic  +
Delphinium uliginosum +
Endemic  +, Illustrated  +
Delphinium umbraculorum +
Endemic  +
Delphinium variegatum +
Endemic  +, Illustrated  +
Delphinium variegatum subsp. kinkiense +
Conservation concern  +, Endemic  +
Delphinium variegatum subsp. thornei +
Conservation concern  +, Endemic  +
Delphinium variegatum subsp. variegatum +
Endemic  +, Illustrated  +
Delphinium viridescens +
Conservation concern  +, Endemic  +, Illustrated  +
Delphinium wootonii +
Illustrated  +
Delphinium xantholeucum +
Conservation concern  +, Endemic  +, Illustrated  +
Dendroalsia abietina +
Illustrated  +
Dendromecon harfordii +
Endemic  +
Dendromecon rigida +
Illustrated  +
Dendrophylax lindenii +
Illustrated  +
Denisophytum pauciflorum +
Illustrated  +, Conservation concern  +
Dennstaedtia punctilobula +
Illustrated  +, Endemic  +
Deparia acrostichoides +
Illustrated  +, Endemic  +
Deparia petersenii +
Introduced  +
Dermatophyllum arizonicum +
Endemic  +
Dermatophyllum guadalupense +
Endemic  +, Conservation concern  +
Dermatophyllum secundiflorum +
Illustrated  +
Deschampsia mackenzieana +
Endemic  +
Descurainia californica +
Illustrated  +, Endemic  +
Descurainia incana +
Illustrated  +, Endemic  +
Descurainia paradisa +
Endemic  +
Descurainia pinnata subsp. brachycarpa +
Endemic  +
Descurainia sophia +
Weedy  +, Introduced  +
Descurainia torulosa +
Endemic  +, Conservation concern  +
Desmanthus brevipes +
Endemic  +
Desmanthus cooleyi +
Illustrated  +
Desmanthus illinoensis +
Weedy  +, Illustrated  +, Endemic  +
Desmanthus leptolobus +
Endemic  +
Desmanthus leptophyllus +
Introduced  +
Desmanthus reticulatus +
Endemic  +
Desmanthus virgatus +
Weedy  +
Desmodium arizonicum +
Illustrated  +
Desmodium canadense +
Weedy  +, Endemic  +
Desmodium canescens +
Endemic  +
Desmodium cuspidatum +
Endemic  +
Desmodium floridanum +
Illustrated  +, Endemic  +
Desmodium illinoense +
Illustrated  +, Endemic  +
Desmodium incanum +
Weedy  +, Introduced  +
Desmodium laevigatum +
Endemic  +
Desmodium lineatum +
Illustrated  +, Endemic  +
Desmodium marilandicum var. lancifolium +
Endemic  +
Desmodium marilandicum var. marilandicum +
Endemic  +
Desmodium nuttallii +
Illustrated  +, Endemic  +
Desmodium ochroleucum +
Conservation concern  +
Desmodium paniculatum +
Endemic  +
Desmodium paniculatum var. fernaldii +
Endemic  +
Desmodium paniculatum var. paniculatum +
Endemic  +
Desmodium procumbens +
Illustrated  +
Desmodium procumbens var. neomexicanum +
Illustrated  +
Desmodium procumbens var. procumbens +
Illustrated  +
Desmodium psilocarpum +
Illustrated  +
Desmodium rotundifolium +
Endemic  +
Desmodium scorpiurus +
Introduced  +
Desmodium sessilifolium +
Weedy  +, Endemic  +
Desmodium strictum +
Endemic  +
Desmodium tenuifolium +
Endemic  +
Desmodium tortuosum +
Weedy  +, Introduced  +
Desmodium triflorum +
Weedy  +, Introduced  +
Desmodium tweedyi +
Illustrated  +, Endemic  +
Desmodium viridiflorum +
Endemic  +
Deutzia +
Introduced  +
Deutzia gracilis +
Introduced  +, Illustrated  +
Deutzia parviflora +
Introduced  +
Deutzia scabra +
Introduced  +
Diamorpha smallii +
Illustrated  +, Endemic  +
Dianella ensifolia +
Introduced  +, Illustrated  +
Dianthus armeria +
Weedy  +, Introduced  +
Dianthus armeria subsp. armeria +
Weedy  +, Introduced  +
Dianthus barbatus +
Introduced  +, Illustrated  +
Dianthus barbatus subsp. barbatus +
Introduced  +, Illustrated  +
Dianthus carthusianorum +
Introduced  +
Dianthus deltoides +
Introduced  +, Illustrated  +
Dianthus deltoides subsp. deltoides +
Introduced  +, Illustrated  +
Dianthus plumarius +
Introduced  +
Dianthus plumarius subsp. plumarius +
Introduced  +
Diapensia lapponica +
Illustrated  +
Diaperia candida +
Endemic  +
Diaperia prolifera +
Illustrated  +, Endemic  +
Diaperia prolifera var. barnebyi +
Illustrated  +, Endemic  +
Diaperia prolifera var. prolifera +
Illustrated  +, Endemic  +
Diaperia verna +
Weedy  +
Diaperia verna var. drummondii +
Endemic  +
Diaperia verna var. verna +
Weedy  +
Diarrhena americana +
Endemic  +
Dicentra canadensis +
Endemic  +
Dicentra cucullaria +
Endemic  +, Illustrated  +
Dicentra eximia +
Endemic  +
Dicentra formosa +
Endemic  +, Illustrated  +
Dicentra formosa subsp. formosa +
Endemic  +, Illustrated  +
Dicentra formosa subsp. oregana +
Endemic  +
Dicentra nevadensis +
Conservation concern  +, Endemic  +
Dicentra ochroleuca +
Endemic  +
Dicentra pauciflora +
Endemic  +
Dicentra uniflora +
Endemic  +, Illustrated  +
Dichaetophora campestris +
Illustrated  +
Dichanthelium boreale +
Endemic  +
Dichanthelium boscii +
Endemic  +
Dichanthelium clandestinum +
Endemic  +
Dichanthelium consanguineum +
Endemic  +
Dichanthelium depauperatum +
Endemic  +
Dichanthelium latifolium +
Endemic  +
Dichanthelium leibergii +
Endemic  +
Dichanthelium linearifolium +
Endemic  +
Dichanthelium malacophyllum +
Endemic  +
Dichanthelium ravenelii +
Endemic  +
Dichanthelium scabriusculum +
Endemic  +
Dichanthelium wilcoxianum +
Endemic  +
Dichanthium annulatum +
Introduced  +
Dichanthium aristatum +
Introduced  +
Dichanthium sericeum +
Introduced  +
Dichelostemma capitatum +
Illustrated  +
Dichelostemma capitatum subsp. capitatum +
Illustrated  +
Dichelostemma capitatum subsp. pauciflorum +
Illustrated  +
Dichelostemma congestum +
Endemic  +
Dichelostemma ida-maia +
Illustrated  +, Endemic  +
Dichelostemma multiflorum +
Illustrated  +, Endemic  +
Dichelostemma volubile +
Endemic  +
Dichelyma capillaceum +
Illustrated  +
Dichelyma pallescens +
Endemic  +
Dichelyma uncinatum +
Endemic  +
Dichondra carolinensis +
Weedy  +, Illustrated  +
Dichondra donelliana +
Endemic  +
Dichondra micrantha +
Weedy  +, Introduced  +
Dichondra recurvata +
Endemic  +
Dichromanthus cinnabarinus +
Illustrated  +
Dichrostachys +
Introduced  +
Dichrostachys cinerea +
Weedy  +, Introduced  +, Illustrated  +
Dicoria canescens +
Illustrated  +
Dicranocarpus parviflorus +
Illustrated  +
Dicranopteris flexuosa +
Illustrated  +
Dicranostegia orcuttiana +
Conservation concern  +, Illustrated  +
Dieteria asteroides var. glandulosa +
Endemic  +
Dieteria bigelovii +
Illustrated  +, Endemic  +
Dieteria bigelovii var. bigelovii +
Illustrated  +, Endemic  +
Dieteria bigelovii var. commixta +
Endemic  +
Dieteria bigelovii var. mucronata +
Endemic  +
Dieteria canescens +
Illustrated  +
Dieteria canescens var. ambigua +
Endemic  +
Dieteria canescens var. aristata +
Endemic  +
Dieteria canescens var. canescens +
Endemic  +
Dieteria canescens var. glabra +
Illustrated  +
Dieteria canescens var. incana +
Endemic  +
Dieteria canescens var. leucanthemifolia +
Endemic  +
Dieteria canescens var. nebraskana +
Endemic  +
Dieteria canescens var. sessiliflora +
Endemic  +
Dieteria canescens var. shastensis +
Endemic  +
Dieteria canescens var. ziegleri +
Endemic  +
Digitalis +
Introduced  +
Digitalis grandiflora +
Introduced  +
Digitalis lanata +
Introduced  +
Digitalis lutea +
Introduced  +
Digitalis purpurea +
Weedy  +, Introduced  +, Illustrated  +
Digitalis purpurea subsp. purpurea +
Weedy  +, Introduced  +, Illustrated  +
Digitaria eriantha +
Introduced  +
Digitaria eriantha subsp. eriantha +
Introduced  +
Digitaria eriantha subsp. pentzii +
Introduced  +
Digitaria filiformis var. dolichophylla +
Endemic  +
Digitaria floridana +
Endemic  +
Digitaria gracillima +
Endemic  +
Digitaria horizontalis +
Introduced  +
Digitaria ischaemum +
Introduced  +
Digitaria longiflora +
Introduced  +
Digitaria milanjiana +
Introduced  +
Digitaria nuda +
Introduced  +
Digitaria pauciflora +
Endemic  +
Digitaria sanguinalis +
Introduced  +
Digitaria serotina +
Endemic  +
Digitaria setigera +
Introduced  +
Digitaria simpsonii +
Endemic  +
Digitaria texana +
Endemic  +
Digitaria violascens +
Introduced  +
Dimeresia howellii +
Illustrated  +, Endemic  +
Dimorphocarpa wislizeni +
Illustrated  +
Dimorphotheca pluvialis +
Introduced  +
Dimorphotheca sinuata +
Introduced  +, Illustrated  +
Dionaea muscipula +
Endemic  +, Illustrated  +
Dioscorea alata +
Introduced  +
Dioscorea bulbifera +
W1  +, Introduced  +
Dioscorea floridana +
Illustrated  +, Endemic  +
Dioscorea polystachya +
Introduced  +, Illustrated  +
Dioscorea sansibarensis +
Introduced  +
Dioscorea villosa +
Illustrated  +, Endemic  +
Diospyros ebenum +
Introduced  +
Diospyros texana +
Illustrated  +
Diospyros virginiana +
Illustrated  +, Endemic  +
Diphasiastrum complanatum +
Illustrated  +
Diphylleia cymosa +
Endemic  +, Illustrated  +
Diphysa thurberi +
Illustrated  +
Diplacus angustatus +
Endemic  +
Diplacus aridus +
Endemic  +
Diplacus aurantiacus +
Endemic  +
Diplacus bicolor +
Endemic  +
Diplacus bigelovii +
Endemic  +
Diplacus bigelovii var. bigelovii +
Endemic  +
Diplacus bigelovii var. cuspidatus +
Endemic  +
Diplacus bolanderi +
Endemic  +
Diplacus brandegeei +
Conservation concern  +
Diplacus calycinus +
Endemic  +
Diplacus cascadensis +
Endemic  +
Diplacus clivicola +
Endemic  +
Diplacus compactus +
Endemic  +
Diplacus congdonii +
Endemic  +
Diplacus constrictus +
Endemic  +
Diplacus cusickii +
Endemic  +, Illustrated  +
Diplacus cusickioides +
Endemic  +
Diplacus deschutesensis +
Endemic  +
Diplacus douglasii +
Endemic  +
Diplacus fremontii +
Illustrated  +
Diplacus grandiflorus +
Endemic  +
Diplacus graniticola +
Endemic  +
Diplacus jepsonii +
Endemic  +
Diplacus johnstonii +
Endemic  +
Diplacus kelloggii +
Endemic  +, Illustrated  +
Diplacus layneae +
Endemic  +, Illustrated  +
Diplacus leptaleus +
Endemic  +
Diplacus linearis +
Endemic  +
Diplacus longiflorus +
Illustrated  +
Diplacus mephiticus +
Endemic  +
Diplacus mohavensis +
Endemic  +, Conservation concern  +
Diplacus nanus +
Endemic  +
Diplacus ovatus +
Endemic  +, Conservation concern  +
Diplacus parryi +
Endemic  +, Illustrated  +
Diplacus parviflorus +
Endemic  +
Diplacus pictus +
Endemic  +, Conservation concern  +
Diplacus pulchellus +
Endemic  +
Diplacus pygmaeus +
Endemic  +
Diplacus rattanii +
Endemic  +
Diplacus rupicola +
Endemic  +
Diplacus rutilus +
Endemic  +
Diplacus thompsonii +
Endemic  +, Illustrated  +
Diplacus torreyi +
Endemic  +, Illustrated  +
Diplacus traskiae +
Endemic  +
Diplacus tricolor +
Endemic  +
Diplacus vandenbergensis +
Endemic  +
Diplacus viscidus +
Endemic  +
Diplazium esculentum +
Introduced  +
Diplazium pycnocarpon +
Illustrated  +, Endemic  +
Diplotaxis erucoides +
Introduced  +
Diplotaxis muralis +
Weedy  +, Introduced  +, Illustrated  +
Diplotaxis tenuifolia +
Weedy  +, Introduced  +
Dipogon +
Introduced  +
Dipogon lignosus +
Introduced  +, Illustrated  +
Dirca decipiens +
Endemic  +
Dirca occidentalis +
Endemic  +
Dirca palustris +
Endemic  +, Illustrated  +
Dithyrea californica +
Illustrated  +
Dithyrea maritima +
Conservation concern  +
Ditrysinia +
Endemic  +
Ditrysinia fruticosa +
Endemic  +, Illustrated  +
Dittrichia graveolens +
Introduced  +, Illustrated  +
Dodecahema leptoceras +
Illustrated  +, Endemic  +, Conservation concern  +
Dodecatheon alpinum +
Endemic  +
Dodecatheon amethystinum +
Endemic  +
Dodecatheon clevelandii +
Conservation concern  +
Dodecatheon clevelandii var. clevelandii +
Conservation concern  +
Dodecatheon clevelandii var. gracile +
Conservation concern  +
Dodecatheon clevelandii var. insulare +
Conservation concern  +
Dodecatheon clevelandii var. patulum +
Conservation concern  +
Dodecatheon conjugens +
Endemic  +
Dodecatheon conjugens var. conjugens +
Endemic  +
Dodecatheon conjugens var. viscidum +
Endemic  +
Dodecatheon dentatum +
Endemic  +
Dodecatheon hendersonii +
Endemic  +
Dodecatheon jeffreyi +
Endemic  +
Dodecatheon meadia +
Illustrated  +, Endemic  +
Dodecatheon poeticum +
Endemic  +
Dodecatheon pulchellum +
Illustrated  +
Dodecatheon pulchellum var. cusickii +
Illustrated  +
Dodecatheon pulchellum var. distolum +
Illustrated  +
Dodecatheon pulchellum var. macrocarpum +
Illustrated  +
Dodecatheon pulchellum var. monanthum +
Endemic  +
Dodecatheon pulchellum var. pulchellum +
Illustrated  +
Dodecatheon pulchellum var. shoshonense +
Illustrated  +
Dodecatheon pulchellum var. zionense +
Endemic  +
Dodecatheon redolens +
Illustrated  +, Endemic  +
Dodecatheon subalpinum +
Endemic  +
Doellingeria infirma +
Endemic  +
Doellingeria sericocarpoides +
Endemic  +
Doellingeria umbellata +
Illustrated  +, Endemic  +
Doellingeria umbellata var. pubens +
Endemic  +
Doellingeria umbellata var. umbellata +
Illustrated  +, Endemic  +
Donnellia commutata +
Illustrated  +
Donrichardsia macroneuron +
Endemic  +, Illustrated  +
Dopatrium +
Introduced  +
Dopatrium junceum +
Weedy  +, Introduced  +, Illustrated  +
Doronicum orientale +
Introduced  +
Doronicum pardalianches +
Introduced  +, Illustrated  +
Dorstenia contrajerva +
Introduced  +, Illustrated  +
Douglasia alaskana +
Endemic  +
Douglasia arctica +
Endemic  +
Douglasia beringensis +
Illustrated  +, Endemic  +, Conservation concern  +
Douglasia gormanii +
Endemic  +
Douglasia idahoensis +
Endemic  +
Douglasia laevigata +
Endemic  +
Douglasia montana +
Endemic  +
Douglasia nivalis +
Endemic  +
Draba albertina +
Endemic  +
Draba aleutica +
Illustrated  +, Conservation concern  +
Draba aprica +
Endemic  +
Draba arabisans +
Endemic  +
Draba arctogena +
Endemic  +
Draba argyrea +
Endemic  +
Draba arida +
Endemic  +, Conservation concern  +
Draba asprella +
Illustrated  +, Endemic  +
Draba asprella var. asprella +
Illustrated  +, Endemic  +
Draba asprella var. stelligera +
Endemic  +, Conservation concern  +
Draba aurea +
Endemic  +
Draba aureola +
Illustrated  +, Endemic  +
Draba brachycarpa +
Endemic  +
Draba breweri +
Endemic  +
Draba californica +
Endemic  +
Draba cana +
Endemic  +
Draba carnosula +
Illustrated  +, Endemic  +, Conservation concern  +
Draba corrugata +
Illustrated  +, Endemic  +, Conservation concern  +
Draba crassa +
Endemic  +
Draba cruciata +
Endemic  +, Conservation concern  +
Draba cusickii +
Endemic  +
Draba densifolia +
Illustrated  +, Endemic  +
Draba exunguiculata +
Endemic  +, Conservation concern  +
Draba graminea +
Endemic  +, Conservation concern  +
Draba grayana +
Endemic  +, Conservation concern  +
Draba hitchcockii +
Illustrated  +, Endemic  +
Draba howellii +
Endemic  +
Draba incerta +
Endemic  +
Draba incrassata +
Endemic  +
Draba jaegeri +
Endemic  +, Conservation concern  +
Draba kassii +
Endemic  +, Conservation concern  +
Draba kluanei +
Endemic  +, Conservation concern  +
Draba lemmonii +
Endemic  +
Draba longisquamosa +
Endemic  +
Draba macounii +
Endemic  +
Draba maguirei +
Endemic  +
Draba monoensis +
Endemic  +, Conservation concern  +
Draba murrayi +
Endemic  +, Conservation concern  +
Draba nemorosa +
Weedy  +, Introduced  +
Draba novolympica +
Endemic  +
Draba ogilviensis +
Endemic  +
Draba oligosperma +
Illustrated  +, Endemic  +
Draba oreibata +
Endemic  +
Draba paucifructa +
Illustrated  +, Endemic  +, Conservation concern  +
Draba paysonii +
Endemic  +
Draba pennellii +
Endemic  +, Conservation concern  +
Draba platycarpa +
Illustrated  +, Endemic  +
Draba porsildii +
Endemic  +
Draba pterosperma +
Endemic  +
Draba ramosissima +
Endemic  +
Draba ramulosa +
Endemic  +, Conservation concern  +
Draba reptans +
Endemic  +
Draba ruaxes +
Endemic  +
Draba scotteri +
Endemic  +, Conservation concern  +
Draba sharsmithii +
Illustrated  +, Endemic  +, Conservation concern  +
Draba sierrae +
Endemic  +, Conservation concern  +
Draba sphaerocarpa +
Endemic  +
Draba sphaeroides +
Endemic  +, Conservation concern  +
Draba standleyi +
Endemic  +, Conservation concern  +
Draba stenoloba +
Endemic  +
Draba streptobrachia +
Endemic  +
Draba streptocarpa +
Illustrated  +, Endemic  +
Draba subalpina +
Endemic  +
Draba subumbellata +
Illustrated  +, Endemic  +
Draba trichocarpa +
Endemic  +, Conservation concern  +
Draba ventosa +
Endemic  +
Draba verna +
Weedy  +, Introduced  +
Draba yukonensis +
Illustrated  +, Endemic  +, Conservation concern  +
Draba zionensis +
Endemic  +
Drepanocladus aduncus +
Illustrated  +
Drepanocladus arcticus +
Illustrated  +
Drepanocladus cardotii +
Endemic  +
Drepanocladus polygamus +
Illustrated  +
Drepanocladus sordidus +
Illustrated  +
Drosanthemum floribundum +
Introduced  +, Illustrated  +
Drosera filiformis +
Endemic  +
Drosera intermedia +
Illustrated  +
Drosera linearis +
Endemic  +
Drosera tracyi +
Endemic  +
Drummondia prorepens +
Endemic  +, Illustrated  +
Dryas ajanensis +
Illustrated  +
Dryas ajanensis subsp. beringensis +
Illustrated  +
Dryas drummondii +
Endemic  +
Dryas hookeriana +
Endemic  +
Dryas integrifolia +
Illustrated  +
Dryas integrifolia subsp. integrifolia +
Illustrated  +
Dryas integrifolia subsp. sylvatica +
Illustrated  +
Dryas octopetala +
Endemic  +
Drymaria cordata +
Weedy  +, Introduced  +, Illustrated  +
Drymaria cordata var. cordata +
Weedy  +, Introduced  +, Illustrated  +
Drymaria molluginea +
Illustrated  +
Drymocallis arguta +
Endemic  +
Drymocallis arizonica +
Endemic  +
Drymocallis ashlandica +
Endemic  +
Drymocallis campanulata +
Endemic  +
Drymocallis convallaria +
Endemic  +
Drymocallis cuneifolia +
Conservation concern  +, Endemic  +, Illustrated  +
Drymocallis cuneifolia var. cuneifolia +
Conservation concern  +, Endemic  +, Illustrated  +
Drymocallis cuneifolia var. ewanii +
Conservation concern  +, Endemic  +, Illustrated  +
Drymocallis deseretica +
Endemic  +
Drymocallis fissa +
Endemic  +, Illustrated  +
Drymocallis glabrata +
Endemic  +
Drymocallis glandulosa +
Illustrated  +
Drymocallis glandulosa var. glandulosa +
Illustrated  +
Drymocallis glandulosa var. reflexa +
Illustrated  +
Drymocallis glandulosa var. viscida +
Endemic  +, Illustrated  +
Drymocallis glandulosa var. wrangelliana +
Illustrated  +
Drymocallis hansenii +
Endemic  +
Drymocallis lactea +
Endemic  +
Drymocallis lactea var. austiniae +
Endemic  +
Drymocallis lactea var. lactea +
Endemic  +
Drymocallis micropetala +
Endemic  +
Drymocallis pseudorupestris +
Endemic  +
Drymocallis pseudorupestris var. crumiana +
Endemic  +
Drymocallis pseudorupestris var. pseudorupestris +
Endemic  +
Drymocallis pseudorupestris var. saxicola +
Endemic  +
Drymocallis rhomboidea +
Endemic  +, Illustrated  +
Dryopetalon runcinatum +
Illustrated  +
Dryopteris campyloptera +
Endemic  +
Dryopteris celsa +
Endemic  +
Dryopteris clintoniana +
Endemic  +
Dryopteris cristata +
Illustrated  +
Dryopteris fragrans +
Illustrated  +
Dryopteris intermedia +
Illustrated  +, Endemic  +
Dryopteris ludoviciana +
Endemic  +
Dryopteris marginalis +
Illustrated  +, Endemic  +
Drypetes lateriflora +
Illustrated  +
Duchesnea +
Introduced  +
Duchesnea indica +
Introduced  +, Illustrated  +
Duchesnea indica var. indica +
Introduced  +, Illustrated  +
Dudleya abramsii subsp. abramsii +
Conservation concern  +
Dudleya abramsii subsp. affinis +
Endemic  +, Conservation concern  +
Dudleya abramsii subsp. bettinae +
Endemic  +, Conservation concern  +
Dudleya abramsii subsp. calcicola +
Endemic  +
Dudleya abramsii subsp. murina +
Endemic  +, Conservation concern  +
Dudleya blochmaniae +
Conservation concern  +
Dudleya blochmaniae subsp. blochmaniae +
Conservation concern  +
Dudleya blochmaniae subsp. insularis +
Endemic  +, Conservation concern  +
Dudleya brevifolia +
Endemic  +, Conservation concern  +
Dudleya candelabrum +
Illustrated  +, Endemic  +, Conservation concern  +
Dudleya cespitosa +
Endemic  +
Dudleya cymosa +
Illustrated  +, Endemic  +
Dudleya cymosa subsp. agourensis +
Endemic  +, Conservation concern  +
Dudleya cymosa subsp. crebrifolia +
Illustrated  +, Endemic  +
Dudleya cymosa subsp. cymosa +
Illustrated  +, Endemic  +
Dudleya cymosa subsp. gigantea +
Endemic  +
Dudleya cymosa subsp. marcescens +
Endemic  +, Conservation concern  +
Dudleya cymosa subsp. ovatifolia +
Endemic  +, Conservation concern  +
Dudleya cymosa subsp. paniculata +
Endemic  +
Dudleya cymosa subsp. pumila +
Endemic  +
Dudleya densiflora +
Illustrated  +, Endemic  +, Conservation concern  +
Dudleya edulis +
Illustrated  +
Dudleya farinosa +
Endemic  +
Dudleya greenei +
Endemic  +
Dudleya multicaulis +
Endemic  +, Conservation concern  +
Dudleya nesiotica +
Endemic  +, Conservation concern  +
Dudleya palmeri +
Endemic  +
Dudleya parva +
Endemic  +, Conservation concern  +
Dudleya saxosa +
Endemic  +
Dudleya saxosa subsp. aloides +
Endemic  +
Dudleya saxosa subsp. collomiae +
Endemic  +
Dudleya saxosa subsp. saxosa +
Endemic  +
Dudleya stolonifera +
Endemic  +, Conservation concern  +
Dudleya traskiae +
Endemic  +, Conservation concern  +
Dudleya variegata +
Illustrated  +, Conservation concern  +
Dudleya verityi +
Endemic  +, Conservation concern  +
Dudleya virens +
Conservation concern  +
Dudleya virens subsp. hassei +
Conservation concern  +
Dudleya virens subsp. insularis +
Conservation concern  +
Dudleya virens subsp. virens +
Conservation concern  +
Dudleya viscida +
Endemic  +, Conservation concern  +
Dulichium arundinaceum +
Illustrated  +, Endemic  +
Dulichium arundinaceum var. arundinaceum +
Illustrated  +, Endemic  +
Dulichium arundinaceum var. boreale +
Illustrated  +, Endemic  +
Dypsis lutescens +
Introduced  +, Illustrated  +
Dysodiopsis tagetoides +
Illustrated  +, Endemic  +
Dysphania ambrosioides +
Weedy  +, Illustrated  +
Dysphania aristata +
Introduced  +
Dysphania botrys +
Weedy  +, Introduced  +, Illustrated  +
Dysphania carinata +
Introduced  +
Dysphania chilensis +
Introduced  +, Illustrated  +
Dysphania cristata +
Introduced  +
Dysphania graveolens +
Illustrated  +
Dysphania multifida +
Introduced  +, Illustrated  +
Dysphania pumilio +
Introduced  +, Illustrated  +
Dyssodia papposa +
Illustrated  +
E
Eastwoodia elegans +
Illustrated  +, Endemic  +
Eatonella nivea +
Illustrated  +, Endemic  +
Ebenopsis ebano +
Illustrated  +
Ecballium +
Introduced  +
Ecballium elaterium +
Introduced  +, Illustrated  +
Echeandia flavescens +
Illustrated  +
Echeveria strictiflora +
Illustrated  +
Echinacea angustifolia +
Endemic  +
Echinacea atrorubens +
Endemic  +
Echinacea laevigata +
Endemic  +, Conservation concern  +
Echinacea pallida +
Illustrated  +, Endemic  +
Echinacea paradoxa +
Endemic  +, Conservation concern  +
Echinacea paradoxa var. neglecta +
Endemic  +, Conservation concern  +
Echinacea paradoxa var. paradoxa +
Endemic  +, Conservation concern  +
Echinacea purpurea +
Illustrated  +, Endemic  +
Echinacea sanguinea +
Endemic  +
Echinacea simulata +
Endemic  +
Echinacea tennesseensis +
Endemic  +, Conservation concern  +
Echinocactus horizonthalonius +
Illustrated  +
Echinocactus polycephalus var. xeranthemoides +
Endemic  +
Echinocereus arizonicus +
Illustrated  +
Echinocereus bonkerae +
Endemic  +
Echinocereus chisosensis +
Endemic  +, Conservation concern  +
Echinocereus davisii +
Illustrated  +, Endemic  +
Echinocereus fasciculatus +
Illustrated  +
Echinocereus pentalophus +
Illustrated  +
Echinocereus poselgeri +
Illustrated  +
Echinocereus reichenbachii +
Conservation concern  +
Echinocereus rigidissimus +
Illustrated  +
Echinocereus rigidissimus var. rigidissimus +
Illustrated  +
Echinocereus triglochidiatus +
Endemic  +
Echinocereus viridiflorus +
Illustrated  +
Echinochloa colona +
Introduced  +
Echinochloa crus-galli +
Introduced  +
Echinochloa frumentacea +
Introduced  +
Echinochloa muricata var. microstachya +
Endemic  +
Echinochloa oryzoides +
Introduced  +
Echinochloa paludigena +
Endemic  +
Echinocystis +
Endemic  +
Echinocystis lobata +
Endemic  +, Illustrated  +
Echinodorus cordifolius +
Illustrated  +
Echinodorus cordifolius subsp. cordifolius +
Illustrated  +
Echinodorus floridanus +
Endemic  +, Conservation concern  +
Echinomastus intertextus +
Illustrated  +
Echinomastus intertextus var. dasyacanthus +
Endemic  +
Echinomastus intertextus var. intertextus +
Illustrated  +
Echinomastus johnsonii +
Illustrated  +, Endemic  +
Echinomastus mariposensis +
Conservation concern  +
Echinomastus warnockii +
Endemic  +
Echinopepon wrightii +
Illustrated  +
Echinophyllum sachalinense +
Illustrated  +
Echinops exaltatus +
Introduced  +, Illustrated  +
Echinops ritro subsp. ruthenicus +
Introduced  +
Echinops sphaerocephalus +
Introduced  +
Echites umbellatus +
Illustrated  +
Eclipta prostrata +
Illustrated  +
Edgeworthia +
Introduced  +
Edgeworthia gardneri +
Introduced  +, Illustrated  +
Egeria densa +
Weedy  +, Introduced  +, Illustrated  +
Egletes viscosa +
Illustrated  +
Ehrharta calycina +
Introduced  +
Ehrharta erecta +
Introduced  +
Eichhornia azurea +
W2  +, W1  +, Introduced  +
Eichhornia crassipes +
W2  +, W1  +, Introduced  +, …
Elaeis guineensis +
Introduced  +, Illustrated  +
Elatine ambigua +
Weedy  +, Introduced  +
Elatine americana +
Endemic  +
Elatine chilensis +
Weedy  +
Elatine heterandra +
Endemic  +
Elatine minima +
Endemic  +
Elatine ojibwayensis +
Endemic  +, Conservation concern  +
Elatine rubella +
Endemic  +, Illustrated  +
Elatine triandra +
Introduced  +, Illustrated  +
Eleocharis acicularis +
W2  +, W1  +, Illustrated  +
Eleocharis albida +
Illustrated  +
Eleocharis ambigens +
Illustrated  +
Eleocharis atropurpurea +
Illustrated  +
Eleocharis baldwinii +
W1  +, Illustrated  +, Endemic  +
Eleocharis bella +
Illustrated  +
Eleocharis bernardina +
Endemic  +, Conservation concern  +
Eleocharis bicolor +
Illustrated  +, Conservation concern  +
Eleocharis bolanderi +
Illustrated  +, Endemic  +
Eleocharis brachycarpa +
Illustrated  +, Conservation concern  +
Eleocharis brittonii +
Illustrated  +, Endemic  +
Eleocharis cellulosa +
W1  +, Illustrated  +
Eleocharis coloradoensis +
Illustrated  +
Eleocharis compressa +
Illustrated  +, Endemic  +
Eleocharis compressa var. acutisquamata +
Illustrated  +, Endemic  +
Eleocharis compressa var. compressa +
Illustrated  +, Endemic  +
Eleocharis cylindrica +
Illustrated  +, Conservation concern  +
Eleocharis decumbens +
Illustrated  +, Endemic  +
Eleocharis diandra +
Illustrated  +, Endemic  +, Conservation concern  +
Eleocharis elliptica +
Illustrated  +, Endemic  +
Eleocharis elongata +
Illustrated  +
Eleocharis engelmannii +
Illustrated  +, Endemic  +
Eleocharis equisetoides +
Illustrated  +, Endemic  +
Eleocharis erythropoda +
Illustrated  +, Endemic  +
Eleocharis fallax +
Illustrated  +, Endemic  +, Conservation concern  +
Eleocharis flavescens +
Illustrated  +
Eleocharis flavescens var. flavescens +
Illustrated  +
Eleocharis flavescens var. olivacea +
Illustrated  +, Endemic  +
Eleocharis geniculata +
Illustrated  +
Eleocharis intermedia +
Illustrated  +, Endemic  +
Eleocharis interstincta +
Illustrated  +
Eleocharis kamtschatica +
Illustrated  +
Eleocharis lanceolata +
Illustrated  +, Endemic  +
Eleocharis macrostachya +
Illustrated  +
Eleocharis mamillata +
Illustrated  +
Eleocharis mamillata subsp. mamillata +
Illustrated  +
Eleocharis melanocarpa +
Illustrated  +, Endemic  +
Eleocharis microcarpa +
Illustrated  +
Eleocharis microcarpa var. filiculmis +
Illustrated  +, Endemic  +
Eleocharis microcarpa var. microcarpa +
Illustrated  +
Eleocharis minima +
Illustrated  +
Eleocharis montana +
Illustrated  +
Eleocharis montevidensis +
Illustrated  +
Eleocharis nana +
Illustrated  +
Eleocharis nigrescens +
Illustrated  +
Eleocharis nitida +
Illustrated  +, Endemic  +
Eleocharis obtusa +
W2  +, W1  +, Illustrated  +
Eleocharis obtusetrigona +
Illustrated  +
Eleocharis ovata +
Illustrated  +
Eleocharis pachycarpa +
Introduced  +, Illustrated  +
Eleocharis palustris +
W2  +, W1  +, Illustrated  +
Eleocharis parishii +
Illustrated  +
Eleocharis parvula +
W1  +, Illustrated  +
Eleocharis quadrangulata +
W1  +, Illustrated  +
Eleocharis quinqueflora +
Illustrated  +
Eleocharis radicans +
Illustrated  +
Eleocharis ravenelii +
Illustrated  +, Conservation concern  +
Eleocharis retroflexa +
Illustrated  +
Eleocharis reverchonii +
Illustrated  +, Endemic  +, Conservation concern  +
Eleocharis robbinsii +
Illustrated  +, Endemic  +
Eleocharis rostellata +
W1  +, Illustrated  +
Eleocharis suksdorfiana +
Illustrated  +, Endemic  +
Eleocharis tenuis +
Illustrated  +, Endemic  +
Eleocharis tenuis var. pseudoptera +
Illustrated  +, Endemic  +
Eleocharis tenuis var. tenuis +
Illustrated  +, Endemic  +
Eleocharis tenuis var. verrucosa +
Illustrated  +, Endemic  +
Eleocharis tortilis +
Illustrated  +, Endemic  +
Eleocharis tricostata +
Illustrated  +, Endemic  +
Eleocharis tuberculosa +
Illustrated  +, Endemic  +
Eleocharis uniglumis +
Illustrated  +
Eleocharis vivipara +
W1  +, Illustrated  +, Endemic  +
Eleocharis wolfii +
Illustrated  +, Endemic  +
Elephantopus elatus +
Endemic  +
Elephantopus nudatus +
Endemic  +
Eleusine coracana +
Introduced  +
Eleusine coracana subsp. africana +
Introduced  +
Eleusine coracana subsp. coracana +
Introduced  +
Eleusine indica +
Introduced  +
Eleusine tristachya +
Introduced  +
Elliottia racemosa +
Endemic  +, Conservation concern  +
Elliottii +
Endemic  +
Elmera racemosa +
Illustrated  +, Endemic  +
Elodea bifoliata +
Endemic  +
Elodea nuttallii +
Illustrated  +
Elodium blandowii +
Illustrated  +
Elodium elodioides +
Endemic  +
Eltroplectris calcarata +
Illustrated  +
Elymus alaskanus subsp. alaskanus +
Endemic  +
Elymus canadensis var. canadensis +
Endemic  +
Elymus canadensis var. robustus +
Endemic  +
Elymus diversiglumis +
Endemic  +
Elymus elymoides subsp. brevifolius +
Endemic  +
Elymus elymoides subsp. californicus +
Endemic  +
Elymus elymoides subsp. hordeoides +
Endemic  +
Elymus glaucus subsp. virescens +
Endemic  +
Elymus hirsutus +
Endemic  +
Elymus hystrix +
Endemic  +
Elymus lanceolatus subsp. lanceolatus +
Endemic  +
Elymus macrourus +
Endemic  +
Elymus repens +
Introduced  +
Elymus riparius +
Endemic  +
Elymus scribneri +
Endemic  +
Elymus sierrae +
Endemic  +
Elymus stebbinsii +
Endemic  +
Elymus stebbinsii subsp. septentrionalis +
Endemic  +
Elymus stebbinsii subsp. stebbinsii +
Endemic  +
Elymus trachycaulus subsp. virescens +
Endemic  +
Elymus villosus +
Endemic  +
Elymus violaceus +
Endemic  +
Elymus virginicus +
Endemic  +
Elymus virginicus var. halophilus +
Endemic  +
Elymus virginicus var. intermedius +
Endemic  +
Elymus virginicus var. jejunus +
Endemic  +
Elymus virginicus var. virginicus +
Endemic  +
Elymus wiegandii +
Endemic  +
Emex australis +
Weedy  +, Introduced  +, Illustrated  +
Emex spinosa +
Weedy  +, Introduced  +
Emilia sonchifolia +
Introduced  +, Illustrated  +
Emorya suaveolens +
Illustrated  +
Empetrum atropurpureum +
Endemic  +
Empetrum eamesii +
Endemic  +
Empetrum nigrum +
Illustrated  +
Encelia farinosa +
Illustrated  +
Encelia nutans +
Endemic  +
Encelia resinifera +
Endemic  +
Encelia scaposa +
Illustrated  +, Endemic  +
Encelia virginensis +
Endemic  +
Enceliopsis argophylla +
Endemic  +
Enceliopsis covillei +
Endemic  +
Enceliopsis nudicaulis +
Illustrated  +, Endemic  +
Encyclia tampensis +
Illustrated  +
Enemion biternatum +
Endemic  +, Illustrated  +
Enemion hallii +
Endemic  +, Illustrated  +
Enemion occidentale +
Endemic  +, Illustrated  +
Enemion savilei +
Endemic  +, Illustrated  +
Enemion stipitatum +
Endemic  +, Illustrated  +
Engelmannia peristenia +
Illustrated  +
Enterolobium +
Introduced  +
Enterolobium contortisiliquum +
Introduced  +, Illustrated  +
Entodon brevisetus +
Endemic  +
Entodon cladorrhizans +
Endemic  +
Entodon concinnus +
Illustrated  +
Entodon seductrix +
Endemic  +
Entodontopsis leucostega +
Illustrated  +
Ephedra californica +
Illustrated  +
Ephedra coryi +
Illustrated  +, Endemic  +
Ephedra cutleri +
Endemic  +
Ephedra fasciculata +
Endemic  +
Ephedra funerea +
Endemic  +, Conservation concern  +
Ephedra nevadensis +
Endemic  +
Ephedra pedunculata +
Conservation concern  +
Ephedra torreyana +
Illustrated  +
Ephedra trifurca +
Illustrated  +
Ephedra viridis +
Endemic  +
Epidendrum floridense +
Illustrated  +, Endemic  +
Epifagus virginiana +
Illustrated  +
Epigaea repens +
Illustrated  +, Endemic  +
Epipactis atrorubens +
Introduced  +
Epipactis helleborine +
Introduced  +, Illustrated  +
Epiphyllum phyllanthus +
Introduced  +, Illustrated  +
Epiphyllum phyllanthus var. hookeri +
Introduced  +, Illustrated  +
Epipterygium tozeri +
Illustrated  +
Epithelantha micromeris +
Illustrated  +
Epithelantha micromeris var. micromeris +
Illustrated  +
Epixiphium wislizeni +
Illustrated  +
Equisetum arvense +
Illustrated  +
Equisetum hyemale +
Illustrated  +
Equisetum hyemale subsp. affine +
Illustrated  +
Equisetum ramosissimum +
Introduced  +
Equisetum ramosissimum subsp. ramosissimum +
Introduced  +
Equisetum scirpoides +
Illustrated  +
Equisetum telmateia subsp. braunii +
Endemic  +
Equisetum variegatum subsp. alaskanum +
Endemic  +
Eragrostis atrovirens +
Introduced  +
Eragrostis barrelieri +
Introduced  +
Eragrostis cilianensis +
Introduced  +
Eragrostis ciliaris +
Introduced  +
Eragrostis ciliaris var. ciliaris +
Introduced  +
Eragrostis ciliaris var. laxa +
Introduced  +
Eragrostis cumingii +
Introduced  +
Eragrostis curvula +
Introduced  +
Eragrostis elongata +
Introduced  +
Eragrostis frankii +
Endemic  +
Eragrostis gangetica +
Introduced  +
Eragrostis lehmanniana +
Introduced  +
Eragrostis lutescens +
Endemic  +
Eragrostis minor +
Introduced  +
Eragrostis pilosa +
Introduced  +
Eragrostis pilosa var. perplexa +
Introduced  +
Eragrostis pilosa var. pilosa +
Introduced  +
Eragrostis refracta +
Endemic  +
Eragrostis scaligera +
Introduced  +
Eragrostis tef +
Introduced  +
Eragrostis trichodes +
Endemic  +
Eragrostis trichophora +
Introduced  +
Eragrostis unioloides +
Introduced  +
Eranthis hyemalis +
Illustrated  +, Introduced  +
Erechtites glomeratus +
Introduced  +
Erechtites hieraciifolius +
Illustrated  +
Erechtites hieraciifolius var. hieraciifolius +
Illustrated  +
Erechtites hieraciifolius var. megalocarpus +
Endemic  +
Erechtites minimus +
Introduced  +
Eremalche parryi +
Endemic  +, Illustrated  +
Eremalche parryi subsp. kernensis +
Conservation concern  +, Endemic  +
Eremalche parryi subsp. parryi +
Endemic  +, Illustrated  +
Eremalche rotundifolia +
Illustrated  +
Eremochloa ophiuroides +
Introduced  +
Eremocrinum albomarginatum +
Illustrated  +, Endemic  +
Eremogone aberrans +
Endemic  +
Eremogone aculeata +
Endemic  +
Eremogone capillaris var. americana +
Endemic  +
Eremogone congesta +
Endemic  +
Eremogone congesta var. cephaloidea +
Endemic  +
Eremogone congesta var. charlestonensis +
Endemic  +
Eremogone congesta var. congesta +
Endemic  +
Eremogone congesta var. crassula +
Endemic  +
Eremogone congesta var. lithophila +
Endemic  +
Eremogone congesta var. prolifera +
Endemic  +
Eremogone congesta var. simulans +
Endemic  +
Eremogone congesta var. subcongesta +
Endemic  +
Eremogone congesta var. suffrutescens +
Endemic  +
Eremogone eastwoodiae +
Endemic  +
Eremogone eastwoodiae var. adenophora +
Endemic  +
Eremogone eastwoodiae var. eastwoodiae +
Endemic  +
Eremogone fendleri +
Illustrated  +, Endemic  +
Eremogone ferrisiae +
Endemic  +
Eremogone franklinii +
Endemic  +
Eremogone franklinii var. franklinii +
Endemic  +
Eremogone franklinii var. thompsonii +
Endemic  +
Eremogone hookeri +
Illustrated  +, Endemic  +
Eremogone hookeri var. hookeri +
Endemic  +
Eremogone hookeri var. pinetorum +
Illustrated  +, Endemic  +
Eremogone kingii +
Endemic  +
Eremogone kingii var. glabrescens +
Endemic  +
Eremogone kingii var. kingii +
Endemic  +
Eremogone macradenia +
Endemic  +
Eremogone macradenia var. arcuifolia +
Endemic  +
Eremogone macradenia var. macradenia +
Endemic  +
Eremogone pumicola +
Endemic  +
Eremogone stenomeres +
Endemic  +, Conservation concern  +
Eremogone ursina +
Endemic  +, Conservation concern  +
Eremopyrum triticeum +
Introduced  +
Erica cinerea +
Introduced  +, Illustrated  +
Erica lusitanica +
Introduced  +
Erica tetralix +
Introduced  +, Illustrated  +
Erica vagans +
Introduced  +
Ericameria albida +
Endemic  +
Ericameria arborescens +
Endemic  +
Ericameria arizonica +
Endemic  +, Conservation concern  +
Ericameria bloomeri +
Endemic  +
Ericameria cervina +
Endemic  +
Ericameria compacta +
Endemic  +, Conservation concern  +
Ericameria cooperi var. cooperi +
Endemic  +
Ericameria crispa +
Endemic  +, Conservation concern  +
Ericameria cuneata +
Illustrated  +
Ericameria cuneata var. cuneata +
Illustrated  +, Endemic  +, Conservation concern  +
Ericameria cuneata var. macrocephala +
Endemic  +, Conservation concern  +
Ericameria cuneata var. spathulata +
Illustrated  +
Ericameria discoidea +
Illustrated  +, Endemic  +
Ericameria ericoides +
Illustrated  +, Endemic  +
Ericameria fasciculata +
Endemic  +, Conservation concern  +
Ericameria gilmanii +
Endemic  +, Conservation concern  +
Ericameria greenei +
Endemic  +
Ericameria lignumviridis +
Endemic  +, Conservation concern  +
Ericameria linearifolia +
Endemic  +
Ericameria linearis +
Endemic  +
Ericameria nana +
Endemic  +
Ericameria nauseosa var. arenaria +
Endemic  +
Ericameria nauseosa var. bigelovii +
Endemic  +
Ericameria nauseosa var. ceruminosa +
Endemic  +
Ericameria nauseosa var. graveolens +
Endemic  +
Ericameria nauseosa var. hololeuca +
Endemic  +
Ericameria nauseosa var. iridis +
Endemic  +, Conservation concern  +
Ericameria nauseosa var. juncea +
Endemic  +
Ericameria nauseosa var. leiosperma +
Endemic  +
Ericameria nauseosa var. mohavensis +
Endemic  +
Ericameria nauseosa var. nana +
Endemic  +
Ericameria nauseosa var. nauseosa +
Endemic  +
Ericameria nauseosa var. nitida +
Endemic  +
Ericameria nauseosa var. psilocarpa +
Endemic  +, Conservation concern  +
Ericameria nauseosa var. salicifolia +
Endemic  +
Ericameria nauseosa var. speciosa +
Endemic  +
Ericameria nauseosa var. texensis +
Endemic  +, Conservation concern  +
Ericameria nauseosa var. turbinata +
Endemic  +
Ericameria nauseosa var. washoensis +
Endemic  +, Conservation concern  +
Ericameria obovata +
Endemic  +
Ericameria ophitidis +
Endemic  +
Ericameria palmeri var. pachylepis +
Endemic  +
Ericameria palmeri var. palmeri +
Conservation concern  +
Ericameria paniculata +
Endemic  +
Ericameria parishii var. parishii +
Endemic  +
Ericameria parryi +
Endemic  +
Ericameria parryi var. affinis +
Endemic  +, Conservation concern  +
Ericameria parryi var. aspera +
Endemic  +
Ericameria parryi var. attenuata +
Endemic  +
Ericameria parryi var. howardii +
Endemic  +
Ericameria parryi var. imula +
Endemic  +
Ericameria parryi var. latior +
Endemic  +
Ericameria parryi var. monocephala +
Endemic  +, Conservation concern  +
Ericameria parryi var. montana +
Endemic  +, Conservation concern  +
Ericameria parryi var. nevadensis +
Endemic  +
Ericameria parryi var. parryi +
Endemic  +
Ericameria parryi var. salmonensis +
Endemic  +
Ericameria parryi var. vulcanica +
Endemic  +
Ericameria pinifolia +
Conservation concern  +
Ericameria resinosa +
Illustrated  +, Endemic  +
Ericameria suffruticosa +
Endemic  +
Ericameria teretifolia +
Endemic  +
Ericameria watsonii +
Endemic  +
Ericameria winwardii +
Endemic  +, Conservation concern  +
Ericameria zionis +
Endemic  +, Conservation concern  +
Erigeron abajoensis +
Endemic  +, Conservation concern  +
Erigeron acomanus +
Endemic  +, Conservation concern  +
Erigeron aequifolius +
Endemic  +, Conservation concern  +
Erigeron algidus +
Endemic  +, Conservation concern  +
Erigeron aliceae +
Endemic  +
Erigeron allocotus +
Endemic  +
Erigeron annuus +
Endemic  +
Erigeron aphanactis +
Endemic  +
Erigeron aphanactis var. aphanactis +
Endemic  +
Erigeron aphanactis var. congestus +
Endemic  +
Erigeron arenarioides +
Illustrated  +, Endemic  +
Erigeron argentatus +
Endemic  +
Erigeron asperugineus +
Endemic  +
Erigeron aureus +
Endemic  +
Erigeron barbellulatus +
Endemic  +
Erigeron basalticus +
Endemic  +, Conservation concern  +
Erigeron bellidiastrum +
Illustrated  +
Erigeron bellidiastrum var. arenarius +
Illustrated  +
Erigeron bellidiastrum var. bellidiastrum +
Illustrated  +, Endemic  +
Erigeron bellidiastrum var. robustus +
Endemic  +
Erigeron biolettii +
Endemic  +
Erigeron blochmaniae +
Endemic  +, Conservation concern  +
Erigeron bloomeri +
Endemic  +
Erigeron bloomeri var. bloomeri +
Endemic  +
Erigeron bloomeri var. nudatus +
Endemic  +
Erigeron breweri +
Illustrated  +, Endemic  +
Erigeron breweri var. bisanctus +
Endemic  +, Conservation concern  +
Erigeron breweri var. breweri +
Illustrated  +, Endemic  +
Erigeron breweri var. covillei +
Endemic  +
Erigeron breweri var. jacinteus +
Endemic  +
Erigeron breweri var. porphyreticus +
Endemic  +
Erigeron caespitosus +
Endemic  +
Erigeron calvus +
Endemic  +, Conservation concern  +
Erigeron canaani +
Endemic  +
Erigeron cascadensis +
Endemic  +
Erigeron cervinus +
Endemic  +
Erigeron chrysopsidis +
Endemic  +
Erigeron chrysopsidis var. austiniae +
Endemic  +
Erigeron chrysopsidis var. brevifolius +
Endemic  +, Conservation concern  +
Erigeron chrysopsidis var. chrysopsidis +
Endemic  +
Erigeron clokeyi +
Endemic  +
Erigeron clokeyi var. clokeyi +
Endemic  +
Erigeron clokeyi var. pinzliae +
Endemic  +
Erigeron compactus +
Endemic  +, Conservation concern  +
Erigeron compositus +
Illustrated  +
Erigeron concinnus +
Illustrated  +, Endemic  +
Erigeron concinnus var. concinnus +
Illustrated  +, Endemic  +
Erigeron concinnus var. condensatus +
Endemic  +
Erigeron concinnus var. subglaber +
Endemic  +
Erigeron consimilis +
Endemic  +
Erigeron corymbosus +
Endemic  +
Erigeron coulteri +
Endemic  +
Erigeron cronquistii +
Endemic  +, Conservation concern  +
Erigeron davisii +
Endemic  +, Conservation concern  +
Erigeron decumbens +
Endemic  +, Conservation concern  +
Erigeron denalii +
Endemic  +
Erigeron disparipilus +
Endemic  +
Erigeron eatonii +
Illustrated  +, Endemic  +
Erigeron eatonii var. eatonii +
Illustrated  +, Endemic  +
Erigeron eatonii var. lavandulus +
Endemic  +
Erigeron eatonii var. nevadincola +
Endemic  +
Erigeron eatonii var. plantagineus +
Endemic  +
Erigeron eatonii var. sonnei +
Endemic  +
Erigeron eatonii var. villosus +
Endemic  +
Erigeron elatior +
Endemic  +
Erigeron elatus +
Endemic  +
Erigeron elegantulus +
Endemic  +
Erigeron elmeri +
Endemic  +
Erigeron engelmannii +
Endemic  +
Erigeron evermannii +
Endemic  +
Erigeron eximius +
Endemic  +
Erigeron filifolius +
Illustrated  +, Endemic  +
Erigeron flabellifolius +
Illustrated  +, Endemic  +
Erigeron flettii +
Endemic  +
Erigeron foliosus var. confinis +
Endemic  +
Erigeron foliosus var. franciscensis +
Endemic  +
Erigeron foliosus var. hartwegii +
Endemic  +
Erigeron foliosus var. mendocinus +
Endemic  +, Conservation concern  +
Erigeron formosissimus +
Endemic  +
Erigeron formosissimus var. formosissimus +
Endemic  +
Erigeron formosissimus var. viscidus +
Endemic  +
Erigeron garrettii +
Endemic  +, Conservation concern  +
Erigeron geiseri +
Endemic  +
Erigeron glabellus +
Endemic  +
Erigeron glabellus var. glabellus +
Endemic  +
Erigeron glabellus var. pubescens +
Endemic  +
Erigeron glacialis +
Illustrated  +, Endemic  +
Erigeron glacialis var. glacialis +
Illustrated  +, Endemic  +
Erigeron glacialis var. hirsutus +
Endemic  +
Erigeron glaucus +
Endemic  +
Erigeron goodrichii +
Endemic  +
Erigeron gracilis +
Endemic  +
Erigeron grandiflorus +
Illustrated  +, Endemic  +
Erigeron greenei +
Endemic  +, Conservation concern  +
Erigeron hessii +
Endemic  +, Conservation concern  +
Erigeron howellii +
Endemic  +, Conservation concern  +
Erigeron hyperboreus +
Endemic  +
Erigeron hyssopifolius +
Illustrated  +, Endemic  +
Erigeron inornatus +
Endemic  +
Erigeron inornatus var. calidipetris +
Endemic  +
Erigeron inornatus var. inornatus +
Endemic  +
Erigeron inornatus var. keilii +
Endemic  +, Conservation concern  +
Erigeron jonesii +
Illustrated  +, Endemic  +
Erigeron kachinensis +
Endemic  +, Conservation concern  +
Erigeron karvinskianus +
Introduced  +, Illustrated  +
Erigeron klamathensis +
Endemic  +
Erigeron kuschei +
Endemic  +, Conservation concern  +
Erigeron lackschewitzii +
Endemic  +
Erigeron lanatus +
Endemic  +
Erigeron lassenianus +
Endemic  +
Erigeron lassenianus var. deficiens +
Endemic  +
Erigeron lassenianus var. lassenianus +
Endemic  +
Erigeron latus +
Endemic  +
Erigeron leibergii +
Illustrated  +, Endemic  +
Erigeron leiomerus +
Illustrated  +, Endemic  +
Erigeron lemmonii +
Endemic  +, Conservation concern  +
Erigeron linearis +
Illustrated  +, Endemic  +
Erigeron lobatus +
Illustrated  +
Erigeron lonchophyllus +
Illustrated  +, Endemic  +
Erigeron maguirei +
Endemic  +, Conservation concern  +
Erigeron mancus +
Endemic  +, Conservation concern  +
Erigeron mariposanus +
Endemic  +, Conservation concern  +
Erigeron melanocephalus +
Endemic  +
Erigeron miser +
Endemic  +, Conservation concern  +
Erigeron muirii +
Endemic  +, Conservation concern  +
Erigeron multiceps +
Conservation concern  +
Erigeron nanus +
Endemic  +
Erigeron nauseosus +
Endemic  +
Erigeron nematophyllus +
Endemic  +
Erigeron neomexicanus +
Illustrated  +
Erigeron nivalis +
Illustrated  +, Endemic  +
Erigeron ochroleucus +
Endemic  +
Erigeron oreganus +
Endemic  +
Erigeron ovinus +
Endemic  +, Conservation concern  +
Erigeron pallens +
Endemic  +
Erigeron parishii +
Endemic  +, Conservation concern  +
Erigeron peregrinus +
Endemic  +
Erigeron peregrinus var. peregrinus +
Endemic  +
Erigeron peregrinus var. thompsonii +
Endemic  +, Conservation concern  +
Erigeron petrophilus +
Endemic  +
Erigeron petrophilus var. petrophilus +
Endemic  +
Erigeron petrophilus var. sierrensis +
Endemic  +
Erigeron petrophilus var. viscidulus +
Endemic  +
Erigeron philadelphicus +
Illustrated  +, Endemic  +
Erigeron philadelphicus var. glaber +
Endemic  +, Conservation concern  +
Erigeron philadelphicus var. philadelphicus +
Illustrated  +, Endemic  +
Erigeron philadelphicus var. provancheri +
Endemic  +, Conservation concern  +
Erigeron pinnatisectus +
Illustrated  +, Endemic  +
Erigeron piperianus +
Endemic  +
Erigeron piscaticus +
Endemic  +, Conservation concern  +
Erigeron poliospermus +
Illustrated  +, Endemic  +
Erigeron poliospermus var. cereus +
Endemic  +
Erigeron poliospermus var. disciformis +
Endemic  +
Erigeron poliospermus var. poliospermus +
Illustrated  +, Endemic  +
Erigeron porsildii +
Endemic  +
Erigeron procumbens +
Illustrated  +
Erigeron pulchellus +
Illustrated  +, Endemic  +
Erigeron pulchellus var. brauniae +
Endemic  +
Erigeron pulchellus var. pulchellus +
Illustrated  +, Endemic  +
Erigeron pulchellus var. tolsteadii +
Endemic  +, Conservation concern  +
Erigeron pulcherrimus +
Endemic  +
Erigeron pumilus +
Endemic  +
Erigeron pumilus var. intermedius +
Endemic  +
Erigeron pumilus var. pumilus +
Endemic  +
Erigeron purpuratus +
Endemic  +
Erigeron pygmaeus +
Endemic  +
Erigeron radicatus +
Endemic  +
Erigeron reductus +
Endemic  +
Erigeron reductus var. angustatus +
Endemic  +
Erigeron reductus var. reductus +
Endemic  +, Conservation concern  +
Erigeron religiosus +
Endemic  +, Conservation concern  +
Erigeron rhizomatus +
Illustrated  +, Endemic  +, Conservation concern  +
Erigeron robustior +
Endemic  +
Erigeron rybius +
Endemic  +
Erigeron rydbergii +
Endemic  +
Erigeron salishii +
Endemic  +, Conservation concern  +
Erigeron salmonensis +
Endemic  +
Erigeron sanctarum +
Endemic  +
Erigeron serpentinus +
Endemic  +, Conservation concern  +
Erigeron sionis +
Illustrated  +, Endemic  +, Conservation concern  +
Erigeron sionis var. sionis +
Illustrated  +, Endemic  +, Conservation concern  +
Erigeron sionis var. trilobatus +
Endemic  +, Conservation concern  +
Erigeron sparsifolius +
Endemic  +
Erigeron strigosus +
Endemic  +
Erigeron strigosus var. calcicola +
Endemic  +
Erigeron strigosus var. dolomiticola +
Endemic  +
Erigeron strigosus var. septentrionalis +
Endemic  +
Erigeron strigosus var. strigosus +
Endemic  +
Erigeron subglaber +
Endemic  +, Conservation concern  +
Erigeron subtrinervis +
Endemic  +
Erigeron supplex +
Endemic  +, Conservation concern  +
Erigeron tener +
Illustrated  +, Endemic  +
Erigeron tenuis +
Illustrated  +, Endemic  +
Erigeron tracyi +
Illustrated  +
Erigeron trifidus +
Endemic  +
Erigeron tweedyi +
Endemic  +
Erigeron uintahensis +
Endemic  +
Erigeron uncialis +
Illustrated  +, Endemic  +, Conservation concern  +
Erigeron uncialis var. conjugans +
Illustrated  +, Endemic  +, Conservation concern  +
Erigeron uncialis var. uncialis +
Endemic  +, Conservation concern  +
Erigeron untermannii +
Endemic  +, Conservation concern  +
Erigeron ursinus +
Illustrated  +, Endemic  +
Erigeron utahensis +
Illustrated  +, Endemic  +
Erigeron vagus +
Endemic  +
Erigeron vernus +
Illustrated  +, Endemic  +
Erigeron vetensis +
Endemic  +
Erigeron vreelandii +
Illustrated  +
Erigeron watsonii +
Illustrated  +, Endemic  +
Erigeron yukonensis +
Endemic  +
Eriobotrya +
Introduced  +
Eriobotrya japonica +
Introduced  +, Illustrated  +
Eriocaulon cinereum +
Introduced  +
Eriocaulon compressum +
Illustrated  +, Endemic  +
Eriocaulon decangulare +
Illustrated  +
Eriocaulon koernickianum +
Illustrated  +, Endemic  +, Conservation concern  +
Eriocaulon lineare +
Endemic  +
Eriocaulon nigrobracteatum +
Illustrated  +, Endemic  +, Conservation concern  +
Eriocaulon parkeri +
Endemic  +
Eriocaulon ravenelii +
Illustrated  +, Endemic  +, Conservation concern  +
Eriocaulon texense +
Endemic  +
Eriochloa contracta +
Endemic  +
Eriochloa michauxii +
Endemic  +
Eriochloa michauxii var. michauxii +
Endemic  +
Eriochloa michauxii var. simpsonii +
Endemic  +
Eriochloa polystachya +
Introduced  +
Eriochloa villosa +
Introduced  +
Eriogonum abertianum +
Illustrated  +
Eriogonum acaule +
Endemic  +, Conservation concern  +
Eriogonum alatum +
Illustrated  +
Eriogonum alatum var. alatum +
Illustrated  +
Eriogonum alatum var. glabriusculum +
Endemic  +
Eriogonum aliquantum +
Endemic  +
Eriogonum allenii +
Endemic  +
Eriogonum alpinum +
Endemic  +, Conservation concern  +
Eriogonum ammophilum +
Endemic  +, Conservation concern  +
Eriogonum ampullaceum +
Endemic  +
Eriogonum androsaceum +
Endemic  +
Eriogonum anemophilum +
Endemic  +, Conservation concern  +
Eriogonum angulosum +
Endemic  +
Eriogonum annuum +
Illustrated  +
Eriogonum apiculatum +
Endemic  +
Eriogonum apricum +
Endemic  +, Conservation concern  +
Eriogonum apricum var. apricum +
Endemic  +, Conservation concern  +
Eriogonum apricum var. prostratum +
Endemic  +, Conservation concern  +
Eriogonum arborescens +
Endemic  +
Eriogonum arcuatum +
Endemic  +
Eriogonum arcuatum var. arcuatum +
Endemic  +
Eriogonum arcuatum var. rupicola +
Endemic  +
Eriogonum arcuatum var. xanthum +
Endemic  +
Eriogonum aretioides +
Endemic  +
Eriogonum argillosum +
Endemic  +
Eriogonum argophyllum +
Endemic  +, Conservation concern  +
Eriogonum baileyi +
Illustrated  +, Endemic  +
Eriogonum baileyi var. baileyi +
Illustrated  +, Endemic  +
Eriogonum baileyi var. praebens +
Endemic  +
Eriogonum bicolor +
Endemic  +
Eriogonum bifurcatum +
Endemic  +, Conservation concern  +
Eriogonum brachyanthum +
Endemic  +
Eriogonum brachypodum +
Endemic  +
Eriogonum brandegeei +
Endemic  +, Conservation concern  +
Eriogonum breedlovei +
Endemic  +
Eriogonum breedlovei var. breedlovei +
Endemic  +
Eriogonum breedlovei var. shevockii +
Endemic  +
Eriogonum brevicaule +
Illustrated  +, Endemic  +
Eriogonum brevicaule var. bannockense +
Endemic  +
Eriogonum brevicaule var. brevicaule +
Illustrated  +, Endemic  +
Eriogonum brevicaule var. caelitum +
Illustrated  +, Endemic  +
Eriogonum brevicaule var. canum +
Endemic  +, Conservation concern  +
Eriogonum brevicaule var. cottamii +
Endemic  +
Eriogonum brevicaule var. laxifolium +
Endemic  +
Eriogonum brevicaule var. micranthum +
Endemic  +
Eriogonum brevicaule var. nanum +
Endemic  +
Eriogonum butterworthianum +
Endemic  +, Conservation concern  +
Eriogonum caespitosum +
Illustrated  +, Endemic  +
Eriogonum capillare +
Endemic  +
Eriogonum cernuum +
Illustrated  +, Endemic  +
Eriogonum chrysops +
Endemic  +, Conservation concern  +
Eriogonum cinereum +
Endemic  +
Eriogonum cithariforme +
Endemic  +
Eriogonum cithariforme var. agninum +
Endemic  +
Eriogonum cithariforme var. cithariforme +
Endemic  +
Eriogonum clavellatum +
Endemic  +, Conservation concern  +
Eriogonum collinum +
Endemic  +
Eriogonum coloradense +
Endemic  +, Conservation concern  +
Eriogonum compositum +
Endemic  +
Eriogonum compositum var. compositum +
Endemic  +
Eriogonum compositum var. lancifolium +
Endemic  +
Eriogonum compositum var. leianthum +
Endemic  +
Eriogonum concinnum +
Endemic  +, Conservation concern  +
Eriogonum congdonii +
Endemic  +
Eriogonum contiguum +
Endemic  +
Eriogonum contortum +
Endemic  +, Conservation concern  +
Eriogonum correllii +
Endemic  +
Eriogonum corymbosum +
Illustrated  +, Endemic  +
Eriogonum corymbosum var. aureum +
Endemic  +, Conservation concern  +
Eriogonum corymbosum var. corymbosum +
Illustrated  +, Endemic  +
Eriogonum corymbosum var. glutinosum +
Endemic  +
Eriogonum corymbosum var. heilii +
Illustrated  +, Endemic  +
Eriogonum corymbosum var. nilesii +
Illustrated  +, Endemic  +
Eriogonum corymbosum var. orbiculatum +
Endemic  +
Eriogonum corymbosum var. revealianum +
Endemic  +
Eriogonum corymbosum var. velutinum +
Endemic  +
Eriogonum covilleanum +
Endemic  +
Eriogonum crocatum +
Endemic  +, Conservation concern  +
Eriogonum cronquistii +
Endemic  +, Conservation concern  +
Eriogonum crosbyae +
Endemic  +, Conservation concern  +
Eriogonum cusickii +
Endemic  +
Eriogonum darrovii +
Endemic  +, Conservation concern  +
Eriogonum dasyanthemum +
Endemic  +
Eriogonum deflexum +
Illustrated  +
Eriogonum deflexum var. baratum +
Endemic  +
Eriogonum deflexum var. deflexum +
Illustrated  +
Eriogonum deflexum var. nevadense +
Endemic  +
Eriogonum desertorum +
Illustrated  +, Endemic  +
Eriogonum diclinum +
Endemic  +
Eriogonum divaricatum +
Illustrated  +, Endemic  +
Eriogonum douglasii +
Endemic  +
Eriogonum douglasii var. douglasii +
Endemic  +
Eriogonum douglasii var. elkoense +
Endemic  +
Eriogonum douglasii var. meridionale +
Endemic  +
Eriogonum eastwoodianum +
Endemic  +
Eriogonum effusum +
Endemic  +
Eriogonum elatum +
Endemic  +
Eriogonum elatum var. elatum +
Endemic  +
Eriogonum elatum var. villosum +
Endemic  +
Eriogonum elegans +
Endemic  +
Eriogonum elongatum +
Illustrated  +
Eriogonum elongatum var. elongatum +
Illustrated  +
Eriogonum ephedroides +
Endemic  +
Eriogonum eremicola +
Endemic  +, Conservation concern  +
Eriogonum eremicum +
Endemic  +
Eriogonum ericifolium +
Endemic  +, Conservation concern  +
Eriogonum esmeraldense +
Endemic  +
Eriogonum esmeraldense var. esmeraldense +
Endemic  +
Eriogonum esmeraldense var. toiyabense +
Endemic  +
Eriogonum exaltatum +
Endemic  +
Eriogonum exilifolium +
Endemic  +, Conservation concern  +
Eriogonum fasciculatum +
Illustrated  +
Eriogonum fasciculatum var. fasciculatum +
Illustrated  +
Eriogonum fasciculatum var. flavoviride +
Illustrated  +
Eriogonum fasciculatum var. foliolosum +
Illustrated  +
Eriogonum fasciculatum var. polifolium +
Illustrated  +
Eriogonum flavum +
Illustrated  +, Endemic  +
Eriogonum flavum var. aquilinum +
Endemic  +
Eriogonum flavum var. flavum +
Illustrated  +, Endemic  +
Eriogonum flavum var. piperi +
Endemic  +
Eriogonum fusiforme +
Endemic  +
Eriogonum giganteum +
Illustrated  +, Endemic  +
Eriogonum giganteum var. compactum +
Endemic  +
Eriogonum giganteum var. formosum +
Endemic  +
Eriogonum giganteum var. giganteum +
Illustrated  +, Endemic  +
Eriogonum gilmanii +
Endemic  +
Eriogonum glandulosum +
Endemic  +, Conservation concern  +
Eriogonum gordonii +
Illustrated  +, Endemic  +
Eriogonum gossypinum +
Endemic  +
Eriogonum gracilipes +
Endemic  +
Eriogonum gracillimum +
Endemic  +
Eriogonum grande var. grande +
Endemic  +
Eriogonum grande var. rubescens +
Endemic  +
Eriogonum grande var. timorum +
Endemic  +
Eriogonum greggii +
Conservation concern  +
Eriogonum havardii +
Endemic  +
Eriogonum heermannii +
Illustrated  +, Endemic  +
Eriogonum heermannii var. argense +
Endemic  +
Eriogonum heermannii var. clokeyi +
Endemic  +
Eriogonum heermannii var. floccosum +
Endemic  +
Eriogonum heermannii var. heermannii +
Endemic  +
Eriogonum heermannii var. humilius +
Illustrated  +, Endemic  +
Eriogonum heermannii var. occidentale +
Endemic  +
Eriogonum heermannii var. subspinosum +
Illustrated  +, Endemic  +
Eriogonum heermannii var. sulcatum +
Endemic  +
Eriogonum helichrysoides +
Endemic  +
Eriogonum heracleoides +
Illustrated  +, Endemic  +
Eriogonum heracleoides var. heracleoides +
Illustrated  +, Endemic  +
Eriogonum heracleoides var. leucophaeum +
Endemic  +
Eriogonum hieracifolium +
Illustrated  +
Eriogonum hirtellum +
Endemic  +, Conservation concern  +
Eriogonum hirtiflorum +
Endemic  +
Eriogonum hoffmannii +
Endemic  +
Eriogonum hoffmannii var. hoffmannii +
Endemic  +
Eriogonum hoffmannii var. robustius +
Endemic  +
Eriogonum holmgrenii +
Endemic  +, Conservation concern  +
Eriogonum hookeri +
Endemic  +
Eriogonum howellianum +
Illustrated  +, Endemic  +
Eriogonum hylophilum +
Endemic  +, Conservation concern  +
Eriogonum incanum +
Endemic  +
Eriogonum inerme +
Endemic  +
Eriogonum inerme var. hispidulum +
Endemic  +
Eriogonum inerme var. inerme +
Endemic  +
Eriogonum inflatum +
Illustrated  +
Eriogonum intrafractum +
Illustrated  +, Endemic  +, Conservation concern  +
Eriogonum jamesii +
Illustrated  +
Eriogonum jamesii var. jamesii +
Illustrated  +
Eriogonum jamesii var. simplex +
Endemic  +
Eriogonum jamesii var. undulatum +
Illustrated  +
Eriogonum jonesii +
Endemic  +
Eriogonum kelloggii +
Endemic  +, Conservation concern  +
Eriogonum kennedyi +
Endemic  +
Eriogonum kennedyi var. alpigenum +
Endemic  +, Conservation concern  +
Eriogonum kennedyi var. austromontanum +
Endemic  +, Conservation concern  +
Eriogonum kennedyi var. kennedyi +
Endemic  +
Eriogonum kennedyi var. pinicola +
Endemic  +
Eriogonum kennedyi var. purpusii +
Endemic  +, Conservation concern  +
Eriogonum kingii +
Endemic  +
Eriogonum lachnogynum +
Illustrated  +, Endemic  +
Eriogonum lachnogynum var. colobum +
Illustrated  +, Endemic  +
Eriogonum lachnogynum var. lachnogynum +
Illustrated  +, Endemic  +
Eriogonum lachnogynum var. sarahiae +
Endemic  +
Eriogonum lancifolium +
Endemic  +, Conservation concern  +
Eriogonum latens +
Endemic  +
Eriogonum latifolium +
Endemic  +
Eriogonum lemmonii +
Endemic  +
Eriogonum leptocladon +
Endemic  +
Eriogonum leptocladon var. leptocladon +
Endemic  +
Eriogonum leptocladon var. papiliunculi +
Endemic  +
Eriogonum leptocladon var. ramosissimum +
Endemic  +
Eriogonum leptophyllum +
Endemic  +
Eriogonum libertini +
Endemic  +
Eriogonum lobbii +
Endemic  +
Eriogonum loganum +
Endemic  +
Eriogonum lonchophyllum +
Endemic  +
Eriogonum longifolium +
Weedy  +, Illustrated  +, Endemic  +
Eriogonum longifolium var. gnaphalifolium +
Endemic  +
Eriogonum longifolium var. harperi +
Endemic  +
Eriogonum longifolium var. longifolium +
Illustrated  +, Endemic  +
Eriogonum luteolum +
Illustrated  +, Endemic  +
Eriogonum luteolum var. caninum +
Endemic  +
Eriogonum luteolum var. luteolum +
Illustrated  +, Endemic  +
Eriogonum luteolum var. pedunculatum +
Endemic  +
Eriogonum luteolum var. saltuarium +
Endemic  +
Eriogonum maculatum +
Illustrated  +
Eriogonum mancum +
Endemic  +
Eriogonum marifolium +
Illustrated  +, Endemic  +
Eriogonum marifolium var. cupulatum +
Endemic  +
Eriogonum marifolium var. marifolium +
Illustrated  +, Endemic  +
Eriogonum mensicola +
Endemic  +
Eriogonum microtheca +
Illustrated  +, Endemic  +
Eriogonum microtheca var. alpinum +
Endemic  +
Eriogonum microtheca var. ambiguum +
Endemic  +
Eriogonum microtheca var. arceuthinum +
Illustrated  +, Endemic  +
Eriogonum microtheca var. corymbosoides +
Endemic  +, Conservation concern  +
Eriogonum microtheca var. johnstonii +
Endemic  +, Conservation concern  +
Eriogonum microtheca var. lacus-ursi +
Illustrated  +, Endemic  +
Eriogonum microtheca var. lapidicola +
Endemic  +
Eriogonum microtheca var. laxiflorum +
Illustrated  +, Endemic  +
Eriogonum microtheca var. microtheca +
Endemic  +
Eriogonum microtheca var. panamintense +
Endemic  +
Eriogonum microtheca var. phoeniceum +
Endemic  +
Eriogonum microtheca var. schoolcraftii +
Illustrated  +, Endemic  +
Eriogonum microtheca var. simpsonii +
Endemic  +
Eriogonum mohavense +
Illustrated  +, Endemic  +, Conservation concern  +
Eriogonum molestum +
Endemic  +, Conservation concern  +
Eriogonum multiflorum +
Endemic  +
Eriogonum multiflorum var. multiflorum +
Endemic  +
Eriogonum multiflorum var. riograndis +
Endemic  +
Eriogonum natum +
Endemic  +, Conservation concern  +
Eriogonum nealleyi +
Endemic  +, Conservation concern  +
Eriogonum nervulosum +
Endemic  +, Conservation concern  +
Eriogonum nidularium +
Endemic  +
Eriogonum niveum +
Endemic  +
Eriogonum nortonii +
Endemic  +, Conservation concern  +
Eriogonum novonudum +
Endemic  +
Eriogonum nudum +
Illustrated  +
Eriogonum nudum var. auriculatum +
Endemic  +
Eriogonum nudum var. decurrens +
Endemic  +
Eriogonum nudum var. deductum +
Endemic  +
Eriogonum nudum var. indictum +
Endemic  +
Eriogonum nudum var. murinum +
Endemic  +, Conservation concern  +
Eriogonum nudum var. nudum +
Illustrated  +, Endemic  +
Eriogonum nudum var. oblongifolium +
Endemic  +
Eriogonum nudum var. paralinum +
Endemic  +
Eriogonum nudum var. pauciflorum +
Endemic  +
Eriogonum nudum var. pubiflorum +
Endemic  +
Eriogonum nudum var. regirivum +
Endemic  +, Conservation concern  +
Eriogonum nudum var. scapigerum +
Endemic  +
Eriogonum nudum var. westonii +
Endemic  +
Eriogonum nummulare +
Endemic  +
Eriogonum nutans +
Endemic  +
Eriogonum nutans var. glabratum +
Endemic  +
Eriogonum nutans var. nutans +
Endemic  +
Eriogonum ochrocephalum +
Endemic  +
Eriogonum ochrocephalum var. calcareum +
Endemic  +
Eriogonum ochrocephalum var. ochrocephalum +
Endemic  +
Eriogonum ordii +
Endemic  +
Eriogonum ostlundii +
Endemic  +, Conservation concern  +
Eriogonum ovalifolium +
Illustrated  +, Endemic  +
Eriogonum ovalifolium var. caelestinum +
Endemic  +
Eriogonum ovalifolium var. depressum +
Endemic  +
Eriogonum ovalifolium var. eximium +
Endemic  +
Eriogonum ovalifolium var. monarchense +
Illustrated  +, Endemic  +
Eriogonum ovalifolium var. nivale +
Endemic  +
Eriogonum ovalifolium var. ochroleucum +
Endemic  +
Eriogonum ovalifolium var. ovalifolium +
Illustrated  +, Endemic  +
Eriogonum ovalifolium var. pansum +
Endemic  +
Eriogonum ovalifolium var. purpureum +
Endemic  +
Eriogonum ovalifolium var. vineum +
Endemic  +, Conservation concern  +
Eriogonum ovalifolium var. williamsiae +
Endemic  +, Conservation concern  +
Eriogonum palmerianum +
Endemic  +
Eriogonum panamintense +
Endemic  +
Eriogonum panguicense +
Endemic  +
Eriogonum panguicense var. alpestre +
Endemic  +
Eriogonum panguicense var. panguicense +
Endemic  +
Eriogonum parvifolium +
Endemic  +
Eriogonum pauciflorum +
Illustrated  +, Endemic  +
Eriogonum pendulum +
Endemic  +
Eriogonum pharnaceoides var. cervinum +
Endemic  +
Eriogonum plumatella +
Endemic  +
Eriogonum polypodum +
Endemic  +
Eriogonum prattenianum +
Endemic  +
Eriogonum prattenianum var. avium +
Endemic  +
Eriogonum prattenianum var. prattenianum +
Endemic  +
Eriogonum prociduum +
Endemic  +
Eriogonum prociduum var. mystrium +
Endemic  +
Eriogonum prociduum var. prociduum +
Endemic  +
Eriogonum pulchrum +
Endemic  +
Eriogonum pusillum +
Endemic  +
Eriogonum pyrolifolium +
Endemic  +
Eriogonum pyrolifolium var. coryphaeum +
Endemic  +
Eriogonum pyrolifolium var. pyrolifolium +
Endemic  +
Eriogonum racemosum +
Illustrated  +, Endemic  +
Eriogonum ripleyi +
Endemic  +, Conservation concern  +
Eriogonum rixfordii +
Endemic  +, Conservation concern  +
Eriogonum robustum +
Endemic  +, Conservation concern  +
Eriogonum rosense +
Endemic  +
Eriogonum rosense var. beatleyae +
Endemic  +
Eriogonum rosense var. rosense +
Endemic  +
Eriogonum rubricaule +
Endemic  +
Eriogonum rupinum +
Endemic  +
Eriogonum salicornioides +
Endemic  +
Eriogonum saxatile +
Illustrated  +, Endemic  +
Eriogonum scabrellum +
Endemic  +
Eriogonum scopulorum +
Endemic  +
Eriogonum shockleyi +
Illustrated  +, Endemic  +
Eriogonum siskiyouense +
Endemic  +
Eriogonum smithii +
Endemic  +
Eriogonum soredium +
Endemic  +, Conservation concern  +
Eriogonum spathulatum +
Endemic  +
Eriogonum spergulinum +
Illustrated  +, Endemic  +
Eriogonum spergulinum var. pratense +
Endemic  +
Eriogonum spergulinum var. reddingianum +
Illustrated  +, Endemic  +
Eriogonum spergulinum var. spergulinum +
Endemic  +
Eriogonum sphaerocephalum +
Illustrated  +, Endemic  +
Eriogonum sphaerocephalum var. fasciculifolium +
Endemic  +
Eriogonum sphaerocephalum var. halimioides +
Endemic  +
Eriogonum sphaerocephalum var. sphaerocephalum +
Illustrated  +, Endemic  +
Eriogonum sphaerocephalum var. sublineare +
Endemic  +
Eriogonum strictum +
Illustrated  +, Endemic  +
Eriogonum strictum var. anserinum +
Endemic  +
Eriogonum strictum var. greenei +
Endemic  +
Eriogonum strictum var. proliferum +
Illustrated  +, Endemic  +
Eriogonum strictum var. strictum +
Endemic  +
Eriogonum subreniforme +
Endemic  +
Eriogonum suffruticosum +
Endemic  +
Eriogonum temblorense +
Endemic  +
Eriogonum tenellum +
Illustrated  +
Eriogonum tenellum var. platyphyllum +
Illustrated  +
Eriogonum tenellum var. ramosissimum +
Endemic  +
Eriogonum tenellum var. tenellum +
Illustrated  +
Eriogonum ternatum +
Endemic  +
Eriogonum thomasii +
Illustrated  +
Eriogonum thompsoniae +
Endemic  +
Eriogonum thompsoniae var. albiflorum +
Endemic  +
Eriogonum thompsoniae var. atwoodii +
Endemic  +, Conservation concern  +
Eriogonum thompsoniae var. thompsoniae +
Endemic  +
Eriogonum thornei +
Endemic  +, Conservation concern  +
Eriogonum thymoides +
Endemic  +
Eriogonum tiehmii +
Endemic  +, Conservation concern  +
Eriogonum tomentosum +
Endemic  +
Eriogonum tripodum +
Endemic  +
Eriogonum truncatum +
Endemic  +, Conservation concern  +
Eriogonum tumulosum +
Endemic  +
Eriogonum twisselmannii +
Endemic  +, Conservation concern  +
Eriogonum umbellatum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. ahartii +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. argus +
Endemic  +
Eriogonum umbellatum var. aureum +
Endemic  +
Eriogonum umbellatum var. bahiiforme +
Endemic  +
Eriogonum umbellatum var. canifolium +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. chlorothamnus +
Endemic  +
Eriogonum umbellatum var. cladophorum +
Endemic  +
Eriogonum umbellatum var. cognatum +
Endemic  +
Eriogonum umbellatum var. covillei +
Endemic  +
Eriogonum umbellatum var. desereticum +
Endemic  +
Eriogonum umbellatum var. devestivum +
Endemic  +
Eriogonum umbellatum var. dichrocephalum +
Endemic  +
Eriogonum umbellatum var. dumosum +
Endemic  +
Eriogonum umbellatum var. ellipticum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. furcosum +
Endemic  +
Eriogonum umbellatum var. glaberrimum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. goodmanii +
Endemic  +
Eriogonum umbellatum var. haussknechtii +
Endemic  +
Eriogonum umbellatum var. humistratum +
Endemic  +
Eriogonum umbellatum var. hypoleium +
Endemic  +
Eriogonum umbellatum var. juniporinum +
Endemic  +
Eriogonum umbellatum var. lautum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. majus +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. minus +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. modocense +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. mohavense +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. munzii +
Endemic  +
Eriogonum umbellatum var. nelsoniorum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. nevadense +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. polyanthum +
Endemic  +
Eriogonum umbellatum var. porteri +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. ramulosum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. sandbergii +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. smallianum +
Endemic  +
Eriogonum umbellatum var. speciosum +
Endemic  +
Eriogonum umbellatum var. stragulum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. subaridum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. torreyanum +
Endemic  +
Eriogonum umbellatum var. umbellatum +
Illustrated  +, Endemic  +
Eriogonum umbellatum var. vernum +
Endemic  +
Eriogonum umbellatum var. versicolor +
Illustrated  +, Endemic  +
Eriogonum ursinum +
Endemic  +
Eriogonum ursinum var. erubescens +
Endemic  +
Eriogonum ursinum var. ursinum +
Endemic  +
Eriogonum vestitum +
Illustrated  +, Endemic  +
Eriogonum villiflorum +
Endemic  +
Eriogonum vimineum +
Endemic  +
Eriogonum viridescens +
Endemic  +
Eriogonum viridulum +
Endemic  +
Eriogonum viscidulum +
Endemic  +, Conservation concern  +
Eriogonum visheri +
Endemic  +
Eriogonum watsonii +
Endemic  +
Eriogonum wetherillii +
Endemic  +
Eriogonum wootonii +
Endemic  +
Eriogonum wrightii +
Illustrated  +
Eriogonum wrightii var. membranaceum +
Illustrated  +
Eriogonum wrightii var. nodosum +
Illustrated  +
Eriogonum wrightii var. olanchense +
Endemic  +
Eriogonum wrightii var. subscaposum +
Endemic  +
Eriogonum wrightii var. trachygonum +
Endemic  +
Eriogonum wrightii var. wrightii +
Illustrated  +
Eriogonum zionis +
Endemic  +
Eriogonum zionis var. coccineum +
Endemic  +, Conservation concern  +
Eriogonum zionis var. zionis +
Endemic  +
Eriophorum angustifolium +
Illustrated  +
Eriophorum angustifolium subsp. angustifolium +
Illustrated  +
Eriophorum angustifolium subsp. triste +
Illustrated  +
Eriophorum brachyantherum +
Illustrated  +
Eriophorum callitrix +
Illustrated  +
Eriophorum chamissonis +
Illustrated  +
Eriophorum crinigerum +
Illustrated  +, Endemic  +
Eriophorum gracile +
Illustrated  +
Eriophorum scheuchzeri +
Illustrated  +
Eriophorum tenellum +
Illustrated  +, Endemic  +
Eriophorum vaginatum +
Illustrated  +
Eriophorum virginicum +
Illustrated  +, Endemic  +
Eriophorum viridicarinatum +
Illustrated  +, Endemic  +
Eriophyllum ambiguum +
Endemic  +
Eriophyllum ambiguum var. ambiguum +
Endemic  +
Eriophyllum ambiguum var. paleaceum +
Endemic  +
Eriophyllum confertiflorum +
Illustrated  +
Eriophyllum confertiflorum var. confertiflorum +
Illustrated  +
Eriophyllum confertiflorum var. tanacetiflorum +
Endemic  +, Conservation concern  +
Eriophyllum congdonii +
Endemic  +, Conservation concern  +
Eriophyllum jepsonii +
Endemic  +, Conservation concern  +
Eriophyllum lanatum +
Illustrated  +
Eriophyllum lanatum var. achilleoides +
Illustrated  +
Eriophyllum lanatum var. arachnoideum +
Endemic  +
Eriophyllum lanatum var. croceum +
Endemic  +
Eriophyllum lanatum var. grandiflorum +
Illustrated  +
Eriophyllum lanatum var. hallii +
Endemic  +
Eriophyllum lanatum var. integrifolium +
Endemic  +
Eriophyllum lanatum var. lanatum +
Endemic  +
Eriophyllum lanatum var. lanceolatum +
Endemic  +
Eriophyllum lanatum var. leucophyllum +
Endemic  +
Eriophyllum lanatum var. obovatum +
Endemic  +, Conservation concern  +
Eriophyllum latilobum +
Endemic  +, Conservation concern  +
Eriophyllum mohavense +
Endemic  +
Eriophyllum multicaule +
Illustrated  +, Endemic  +
Eriophyllum nubigenum +
Endemic  +, Conservation concern  +
Eriophyllum staechadifolium +
Illustrated  +, Endemic  +
Eriophyllum wallacei +
Illustrated  +
Errazurizia +
Endemic  +
Errazurizia rotundata +
Illustrated  +, Endemic  +, Conservation concern  +
Eruca vesicaria +
Weedy  +, Introduced  +, Illustrated  +
Eruca vesicaria subsp. sativa +
Weedy  +, Introduced  +, Illustrated  +
Erucastrum gallicum +
Weedy  +, Introduced  +, Illustrated  +
Erysimum ammophilum +
Endemic  +, Conservation concern  +
Erysimum arenicola +
Endemic  +
Erysimum asperum +
Weedy  +, Illustrated  +, Endemic  +
Erysimum capitatum var. capitatum +
Conservation concern  +
Erysimum cheiranthoides +
Weedy  +, Introduced  +
Erysimum cheiri +
Introduced  +
Erysimum coarctatum +
Endemic  +
Erysimum concinnum +
Endemic  +
Erysimum franciscanum +
Illustrated  +, Endemic  +
Erysimum hieraciifolium +
Weedy  +, Introduced  +
Erysimum inconspicuum +
Weedy  +, Illustrated  +, Endemic  +
Erysimum insulare +
Endemic  +
Erysimum menziesii +
Endemic  +, Conservation concern  +
Erysimum occidentale +
Endemic  +
Erysimum perenne +
Endemic  +
Erysimum repandum +
Weedy  +, Introduced  +
Erysimum suffrutescens +
Endemic  +
Erysimum teretifolium +
Endemic  +, Conservation concern  +
Erythranthe acutidens +
Endemic  +, Conservation concern  +, Illustrated  +
Erythranthe alsinoides +
Endemic  +
Erythranthe ampliata +
Endemic  +
Erythranthe androsacea +
Endemic  +
Erythranthe arenaria +
Endemic  +, Illustrated  +
Erythranthe arenicola +
Endemic  +, Conservation concern  +
Erythranthe arvensis +
Illustrated  +
Erythranthe barbata +
Endemic  +
Erythranthe bicolor +
Endemic  +
Erythranthe brachystylis +
Endemic  +, Conservation concern  +
Erythranthe breviflora +
Endemic  +
Erythranthe breweri +
Endemic  +, Illustrated  +
Erythranthe caespitosa +
Endemic  +
Erythranthe calcicola +
Endemic  +, Conservation concern  +
Erythranthe carsonensis +
Endemic  +, Conservation concern  +
Erythranthe charlestonensis +
Endemic  +
Erythranthe chinatiensis +
Endemic  +, Conservation concern  +
Erythranthe cinnabarina +
Endemic  +
Erythranthe corallina +
Endemic  +, Illustrated  +
Erythranthe cordata +
Endemic  +
Erythranthe decora +
Endemic  +, Illustrated  +
Erythranthe dentata +
Endemic  +, Illustrated  +
Erythranthe diffusa +
Conservation concern  +
Erythranthe discolor +
Endemic  +, Conservation concern  +
Erythranthe eastwoodiae +
Endemic  +
Erythranthe erubescens +
Endemic  +
Erythranthe exigua +
Conservation concern  +
Erythranthe filicaulis +
Endemic  +, Conservation concern  +
Erythranthe filicifolia +
Endemic  +, Conservation concern  +
Erythranthe gemmipara +
Endemic  +, Conservation concern  +
Erythranthe geniculata +
Endemic  +
Erythranthe glaucescens +
Endemic  +
Erythranthe gracilipes +
Endemic  +, Conservation concern  +
Erythranthe grandis +
Endemic  +
Erythranthe grayi +
Endemic  +, Conservation concern  +
Erythranthe hallii +
Endemic  +
Erythranthe hardhamiae +
Endemic  +, Conservation concern  +
Erythranthe hymenophylla +
Endemic  +, Conservation concern  +
Erythranthe inconspicua +
Endemic  +
Erythranthe inflatula +
Endemic  +
Erythranthe jungermannioides +
Endemic  +
Erythranthe laciniata +
Endemic  +
Erythranthe lewisii +
Endemic  +
Erythranthe linearifolia +
Endemic  +, Illustrated  +
Erythranthe marmorata +
Endemic  +, Conservation concern  +
Erythranthe michiganensis +
Endemic  +, Conservation concern  +
Erythranthe microphylla +
Endemic  +, Illustrated  +
Erythranthe minor +
Endemic  +
Erythranthe montioides +
Endemic  +, Conservation concern  +, Illustrated  +
Erythranthe moschata +
Endemic  +
Erythranthe norrisii +
Endemic  +, Conservation concern  +
Erythranthe nudata +
Endemic  +
Erythranthe palmeri +
Endemic  +
Erythranthe pardalis +
Endemic  +, Illustrated  +
Erythranthe patula +
Endemic  +
Erythranthe percaulis +
Endemic  +, Conservation concern  +
Erythranthe primuloides +
Endemic  +
Erythranthe ptilota +
Endemic  +, Illustrated  +
Erythranthe pulsiferae +
Endemic  +
Erythranthe purpurea +
Conservation concern  +
Erythranthe regni +
Endemic  +, Conservation concern  +
Erythranthe rhodopetra +
Endemic  +, Conservation concern  +
Erythranthe scouleri +
Endemic  +, Conservation concern  +
Erythranthe shevockii +
Endemic  +, Conservation concern  +
Erythranthe sierrae +
Endemic  +, Conservation concern  +
Erythranthe suksdorfii +
Endemic  +
Erythranthe taylorii +
Endemic  +, Conservation concern  +
Erythranthe thermalis +
Endemic  +, Conservation concern  +
Erythranthe tilingii +
Endemic  +
Erythranthe trinitiensis +
Endemic  +, Conservation concern  +
Erythranthe utahensis +
Endemic  +
Erythranthe washingtonensis +
Endemic  +
Erythranthe willisii +
Endemic  +, Conservation concern  +, Illustrated  +
Erythrina herbacea +
Illustrated  +
Erythronium albidum +
Endemic  +
Erythronium americanum +
Illustrated  +, Endemic  +
Erythronium americanum subsp. americanum +
Illustrated  +, Endemic  +
Erythronium americanum subsp. harperi +
Endemic  +
Erythronium californicum +
Illustrated  +, Endemic  +
Erythronium citrinum +
Endemic  +
Erythronium elegans +
Endemic  +, Conservation concern  +
Erythronium grandiflorum +
Illustrated  +, Endemic  +
Erythronium grandiflorum subsp. candidum +
Endemic  +
Erythronium grandiflorum subsp. grandiflorum +
Endemic  +
Erythronium helenae +
Illustrated  +, Endemic  +
Erythronium hendersonii +
Illustrated  +, Endemic  +
Erythronium klamathense +
Endemic  +
Erythronium mesochoreum +
Illustrated  +, Endemic  +
Erythronium montanum +
Illustrated  +, Endemic  +
Erythronium multiscapideum +
Endemic  +
Erythronium oregonum +
Endemic  +
Erythronium pluriflorum +
Endemic  +, Conservation concern  +
Erythronium propullans +
Illustrated  +, Endemic  +, Conservation concern  +
Erythronium purpurascens +
Illustrated  +, Endemic  +
Erythronium pusaterii +
Endemic  +, Conservation concern  +
Erythronium revolutum +
Illustrated  +, Endemic  +
Erythronium rostratum +
Illustrated  +, Endemic  +
Erythronium tuolumnense +
Illustrated  +, Endemic  +, Conservation concern  +
Erythronium umbilicatum +
Illustrated  +, Endemic  +
Erythronium umbilicatum subsp. monostolum +
Endemic  +
Erythronium umbilicatum subsp. umbilicatum +
Illustrated  +, Endemic  +
Erythrostemon caudatus +
Illustrated  +
Erythrostemon gilliesii +
Weedy  +, Introduced  +
Erythrostemon phyllanthoides +
Illustrated  +, Conservation concern  +
Eschscholzia californica +
W2  +, Illustrated  +
Eschscholzia californica subsp. californica +
Illustrated  +
Eschscholzia californica subsp. mexicana +
W2  +, Illustrated  +
Eschscholzia glyptosperma +
Endemic  +, Illustrated  +
Eschscholzia hypecoides +
Endemic  +
Eschscholzia lemmonii +
Endemic  +
Eschscholzia lemmonii subsp. kernensis +
Conservation concern  +, Endemic  +
Eschscholzia lemmonii subsp. lemmonii +
Endemic  +, Illustrated  +
Eschscholzia lobbii +
Endemic  +, Illustrated  +
Eschscholzia minutiflora +
Illustrated  +
Eschscholzia rhombipetala +
Conservation concern  +, Endemic  +
Eubotrys racemosa +
Illustrated  +, Endemic  +
Eubotrys recurva +
Endemic  +
Eucephalus breweri +
Endemic  +
Eucephalus elegans +
Illustrated  +, Endemic  +
Eucephalus engelmannii +
Illustrated  +, Endemic  +
Eucephalus glabratus +
Endemic  +
Eucephalus glaucescens +
Endemic  +, Conservation concern  +
Eucephalus gormanii +
Endemic  +
Eucephalus ledophyllus +
Endemic  +
Eucephalus ledophyllus var. covillei +
Endemic  +
Eucephalus ledophyllus var. ledophyllus +
Endemic  +
Eucephalus paucicapitatus +
Endemic  +
Eucephalus tomentellus +
Endemic  +
Eucephalus vialis +
Endemic  +, Conservation concern  +
Euchiton gymnocephalus +
Introduced  +
Euchiton involucratus +
Introduced  +
Euchiton sphaericus +
Introduced  +, Illustrated  +
Euclidium syriacum +
Weedy  +, Introduced  +, Illustrated  +
Eucnide bartonioides var. edwardsiana +
Endemic  +
Eucnide urens +
Illustrated  +
Eucommia +
Introduced  +
Eucommia ulmoides +
Introduced  +, Illustrated  +
Eulophia alta +
Illustrated  +
Euonymus alatus +
Introduced  +, Illustrated  +
Euonymus americanus +
Endemic  +
Euonymus atropurpureus +
Weedy  +, Endemic  +
Euonymus europaeus +
Weedy  +, Introduced  +
Euonymus fortunei +
Introduced  +
Euonymus obovatus +
Endemic  +
Euonymus occidentalis +
Endemic  +
Euonymus occidentalis var. occidentalis +
Endemic  +
Euonymus occidentalis var. parishii +
Endemic  +
Eupatorium album +
Endemic  +
Eupatorium album var. album +
Endemic  +
Eupatorium album var. subvenosum +
Endemic  +
Eupatorium album var. vaseyi +
Endemic  +
Eupatorium altissimum +
Endemic  +
Eupatorium anomalum +
Endemic  +, Conservation concern  +
Eupatorium capillifolium +
Illustrated  +, Endemic  +
Eupatorium compositifolium +
Endemic  +
Eupatorium godfreyanum +
Endemic  +
Eupatorium hyssopifolium +
Endemic  +
Eupatorium hyssopifolium var. hyssopifolium +
Endemic  +
Eupatorium hyssopifolium var. laciniatum +
Endemic  +
Eupatorium lancifolium +
Endemic  +
Eupatorium leptophyllum +
Endemic  +
Eupatorium leucolepis +
Endemic  +
Eupatorium leucolepis var. leucolepis +
Endemic  +
Eupatorium leucolepis var. novaeangliae +
Endemic  +
Eupatorium linearifolium +
Endemic  +
Eupatorium mikanioides +
Endemic  +
Eupatorium mohrii +
Endemic  +
Eupatorium perfoliatum +
Endemic  +
Eupatorium petaloideum +
Endemic  +
Eupatorium pilosum +
Endemic  +
Eupatorium resinosum +
Endemic  +
Eupatorium rotundifolium +
Endemic  +
Eupatorium rotundifolium var. ovatum +
Endemic  +
Eupatorium rotundifolium var. rotundifolium +
Endemic  +
Eupatorium rotundifolium var. scabridum +
Endemic  +
Eupatorium semiserratum +
Endemic  +
Eupatorium serotinum +
Illustrated  +, Endemic  +
Eupatorium sessilifolium +
Illustrated  +, Endemic  +
Euphorbia aaron-rossii +
Endemic  +, Conservation concern  +
Euphorbia agraria +
Introduced  +
Euphorbia albomarginata +
Weedy  +
Euphorbia antisyphilitica +
Illustrated  +
Euphorbia astyla +
Conservation concern  +
Euphorbia austrotexana +
Endemic  +, Conservation concern  +, Illustrated  +
Euphorbia austrotexana var. austrotexana +
Endemic  +, Conservation concern  +, Illustrated  +
Euphorbia austrotexana var. carrii +
Endemic  +, Conservation concern  +
Euphorbia bicolor +
Endemic  +
Euphorbia bifurcata +
Illustrated  +
Euphorbia bilobata +
Weedy  +, Illustrated  +
Euphorbia blodgettii +
Endemic  +
Euphorbia chaetocalyx var. triligulata +
Conservation concern  +
Euphorbia commutata +
Endemic  +, Illustrated  +
Euphorbia conferta +
Endemic  +
Euphorbia cordifolia +
Endemic  +
Euphorbia corollata +
Weedy  +, Endemic  +, Illustrated  +
Euphorbia crenulata +
Endemic  +
Euphorbia cumulicola +
Endemic  +, Conservation concern  +
Euphorbia cuphosperma +
Weedy  +
Euphorbia curtisii +
Endemic  +
Euphorbia cyathophora +
Weedy  +
Euphorbia cyparissias +
Weedy  +, Introduced  +
Euphorbia deltoidea +
Endemic  +, Conservation concern  +
Euphorbia deltoidea subsp. adhaerens +
Endemic  +, Conservation concern  +
Euphorbia deltoidea subsp. deltoidea +
Endemic  +, Conservation concern  +
Euphorbia deltoidea subsp. pinetorum +
Endemic  +, Conservation concern  +
Euphorbia deltoidea subsp. serpyllum +
Endemic  +, Conservation concern  +
Euphorbia dendroides +
Introduced  +
Euphorbia discoidalis +
Endemic  +
Euphorbia eriantha +
Illustrated  +
Euphorbia exigua +
Introduced  +
Euphorbia exserta +
Endemic  +
Euphorbia exstipulata +
Illustrated  +
Euphorbia falcata +
Introduced  +
Euphorbia floridana +
Endemic  +
Euphorbia garberi +
Endemic  +, Conservation concern  +
Euphorbia georgiana +
Endemic  +, Conservation concern  +
Euphorbia geyeri var. geyeri +
Endemic  +
Euphorbia geyeri var. wheeleriana +
Conservation concern  +
Euphorbia glyptosperma +
Weedy  +, Illustrated  +
Euphorbia golondrina +
Conservation concern  +
Euphorbia graminea +
Introduced  +
Euphorbia helioscopia +
Weedy  +, Introduced  +
Euphorbia heterophylla +
Weedy  +, Introduced  +, Illustrated  +
Euphorbia hexagona +
Endemic  +, Illustrated  +
Euphorbia hirta +
Weedy  +, Introduced  +
Euphorbia hooveri +
Endemic  +, Conservation concern  +
Euphorbia humistrata +
Weedy  +, Endemic  +
Euphorbia hyssopifolia +
Weedy  +
Euphorbia indivisa +
Illustrated  +
Euphorbia innocua +
Endemic  +
Euphorbia inundata +
Endemic  +, Illustrated  +
Euphorbia inundata var. garrettii +
Endemic  +
Euphorbia inundata var. inundata +
Endemic  +, Illustrated  +
Euphorbia ipecacuanhae +
Endemic  +
Euphorbia jaegeri +
Endemic  +, Conservation concern  +
Euphorbia jejuna +
Conservation concern  +
Euphorbia lasiocarpa +
Weedy  +, Introduced  +
Euphorbia lathyris +
Weedy  +, Introduced  +
Euphorbia longicruris +
Endemic  +
Euphorbia lurida +
Illustrated  +
Euphorbia maculata +
Weedy  +
Euphorbia marginata +
Weedy  +, Illustrated  +
Euphorbia meganaesos +
Endemic  +
Euphorbia mendezii +
Weedy  +, Introduced  +
Euphorbia mercurialina +
Endemic  +
Euphorbia micromera +
Weedy  +
Euphorbia missurica +
Endemic  +
Euphorbia myrsinites +
Weedy  +, Introduced  +
Euphorbia nephradenia +
Endemic  +, Conservation concern  +
Euphorbia nutans +
Weedy  +, Illustrated  +
Euphorbia oblongata +
Weedy  +, Introduced  +
Euphorbia ocellata +
Endemic  +
Euphorbia ocellata subsp. ocellata +
Endemic  +
Euphorbia ocellata subsp. rattanii +
Endemic  +
Euphorbia ouachitana +
Endemic  +
Euphorbia parishii +
Endemic  +
Euphorbia peplidion +
Endemic  +
Euphorbia peplus +
Weedy  +, Introduced  +, Illustrated  +
Euphorbia pergamena +
Conservation concern  +
Euphorbia pinetorum +
Endemic  +, Conservation concern  +
Euphorbia platyphyllos +
Weedy  +, Introduced  +
Euphorbia platysperma +
Conservation concern  +
Euphorbia polycarpa +
Illustrated  +
Euphorbia polycarpa var. polycarpa +
Illustrated  +
Euphorbia polygonifolia +
Endemic  +
Euphorbia polyphylla +
Endemic  +
Euphorbia porteriana +
Endemic  +, Conservation concern  +
Euphorbia prostrata +
Weedy  +
Euphorbia pubentissima +
Endemic  +
Euphorbia purpurea +
Endemic  +
Euphorbia radians +
Illustrated  +
Euphorbia rayturneri +
Endemic  +, Conservation concern  +
Euphorbia roemeriana +
Endemic  +
Euphorbia rosescens +
Endemic  +, Conservation concern  +
Euphorbia schizoloba +
Endemic  +
Euphorbia serpens +
Weedy  +
Euphorbia serrata +
Weedy  +, Introduced  +
Euphorbia setiloba +
Illustrated  +
Euphorbia spathulata +
Weedy  +, Illustrated  +
Euphorbia strictior +
Endemic  +
Euphorbia telephioides +
Endemic  +, Conservation concern  +
Euphorbia terracina +
Weedy  +, Introduced  +
Euphorbia tetrapora +
Endemic  +
Euphorbia texana +
Endemic  +
Euphorbia tithymaloides +
Illustrated  +
Euphorbia tithymaloides subsp. smallii +
Illustrated  +
Euphorbia trichotoma +
Conservation concern  +
Euphorbia vallis-mortae +
Endemic  +
Euphorbia velleriflora +
Weedy  +, Introduced  +
Euphorbia vermiculata +
Weedy  +
Euphorbia virgata +
Weedy  +, Introduced  +, Illustrated  +
Euphorbia yaquiana +
Endemic  +
Euphrasia disjuncta +
Endemic  +
Euphrasia farlowii +
Endemic  +, Illustrated  +
Euphrasia frigida +
Endemic  +
Euphrasia hudsoniana +
Endemic  +, Illustrated  +
Euphrasia micrantha +
Introduced  +
Euphrasia nemorosa +
Introduced  +
Euphrasia oakesii +
Endemic  +
Euphrasia oakesii var. oakesii +
Endemic  +
Euphrasia oakesii var. williamsii +
Endemic  +
Euphrasia ostenfeldii +
Illustrated  +
Euphrasia randii +
Endemic  +
Euphrasia stricta +
Introduced  +
Euphrasia stricta var. brevipila +
Introduced  +
Euphrasia stricta var. stricta +
Introduced  +
Euphrasia subarctica +
Endemic  +
Euphrasia suborbicularis +
Endemic  +
Euphrasia tetraquetra +
Weedy  +, Introduced  +
Euphrasia vinacea +
Endemic  +
Eurhynchiastrum pulchellum +
Illustrated  +
Eurhynchiastrum pulchellum var. barnesii +
Endemic  +, Illustrated  +
Eurhynchiastrum pulchellum var. pulchellum +
Illustrated  +
Eurybia avita +
Endemic  +
Eurybia chlorolepis +
Endemic  +
Eurybia compacta +
Illustrated  +, Endemic  +
Eurybia conspicua +
Endemic  +
Eurybia divaricata +
Endemic  +
Eurybia eryngiifolia +
Endemic  +
Eurybia furcata +
Endemic  +
Eurybia hemispherica +
Illustrated  +, Endemic  +
Eurybia integrifolia +
Illustrated  +, Endemic  +
Eurybia jonesiae +
Endemic  +
Eurybia macrophylla +
Endemic  +
Eurybia merita +
Endemic  +
Eurybia mirabilis +
Endemic  +, Conservation concern  +
Eurybia paludosa +
Endemic  +
Eurybia radula +
Endemic  +
Eurybia radulina +
Endemic  +
Eurybia saxicastelli +
Endemic  +, Conservation concern  +
Eurybia schreberi +
Illustrated  +, Endemic  +
Eurybia spectabilis +
Endemic  +
Eurybia spinulosa +
Endemic  +, Conservation concern  +
Eurybia surculosa +
Endemic  +
Eustachys distichophylla +
Introduced  +
Eustachys floridana +
Endemic  +
Eustachys glauca +
Endemic  +
Eustachys neglecta +
Endemic  +
Eustachys retusa +
Introduced  +
Eustoma exaltatum +
Illustrated  +
Eustoma exaltatum subsp. exaltatum +
Illustrated  +
Eustoma exaltatum subsp. russellianum +
Endemic  +
Euthamia caroliniana +
Illustrated  +, Endemic  +
Euthamia graminifolia +
Illustrated  +, Endemic  +
Euthamia gymnospermoides +
Endemic  +
Euthamia leptocephala +
Endemic  +
Eutrema edwardsii +
Illustrated  +
Eutrochium dubium +
Endemic  +
Eutrochium fistulosum +
Endemic  +
Eutrochium maculatum +
Endemic  +
Eutrochium maculatum var. bruneri +
Endemic  +
Eutrochium maculatum var. foliosum +
Endemic  +
Eutrochium maculatum var. maculatum +
Endemic  +
Eutrochium purpureum +
Illustrated  +, Endemic  +
Eutrochium purpureum var. holzingeri +
Endemic  +
Eutrochium purpureum var. purpureum +
Illustrated  +, Endemic  +
Eutrochium steelei +
Endemic  +
Evolvulus arenarius +
Endemic  +
Evolvulus grisebachii +
Conservation concern  +
Evolvulus nuttallianus +
Illustrated  +
Exochorda +
Introduced  +
Exochorda racemosa +
Introduced  +, Illustrated  +
Eysenhardtia spinosa +
Conservation concern  +
Eysenhardtia texana +
Illustrated  +
F
Fabronia pusilla +
Illustrated  +
Facelis retusa +
Illustrated  +
Fagonia laevis +
Illustrated  +
Fagonia longipes +
Illustrated  +
Fagopyrum esculentum +
Introduced  +, Illustrated  +
Fagopyrum tataricum +
Introduced  +
Fagus grandifolia +
Illustrated  +, Endemic  +
Fallopia baldschuanica +
Introduced  +
Fallopia cilinodis +
Weedy  +, Endemic  +
Fallopia convolvulus +
Weedy  +, Introduced  +
Fallopia dumetorum +
Introduced  +
Fallopia japonica +
Weedy  +, Introduced  +, Illustrated  +
Fallopia japonica var. japonica +
Weedy  +, Introduced  +, Illustrated  +
Fallopia sachalinensis +
Weedy  +, Introduced  +
Fallopia scandens +
Weedy  +, Endemic  +
Fallugia paradoxa +
Illustrated  +
Fatoua villosa +
Introduced  +, Illustrated  +
Fendlera rupicola +
Illustrated  +
Fendlerella utahensis +
Illustrated  +
Ferocactus cylindraceus +
Illustrated  +
Ferocactus emoryi +
Illustrated  +
Ferocactus hamatacanthus +
Illustrated  +
Ferocactus hamatacanthus var. hamatacanthus +
Illustrated  +
Ferocactus hamatacanthus var. sinuatus +
Illustrated  +
Ferocactus viridescens +
Illustrated  +
Ferocactus viridescens var. viridescens +
Illustrated  +
Ferocactus wislizeni +
Illustrated  +
Festuca brachyphylla subsp. breviculmis +
Endemic  +
Festuca brachyphylla subsp. coloradensis +
Endemic  +
Festuca californica +
Endemic  +
Festuca californica subsp. californica +
Endemic  +
Festuca californica subsp. hitchcockiana +
Endemic  +
Festuca californica subsp. parishii +
Endemic  +
Festuca dasyclada +
Endemic  +
Festuca elmeri +
Endemic  +
Festuca filiformis +
Introduced  +
Festuca hyperborea +
Endemic  +
Festuca idahoensis +
Endemic  +
Festuca minutiflora +
Endemic  +
Festuca occidentalis +
Endemic  +
Festuca ovina +
Introduced  +
Festuca paradoxa +
Endemic  +
Festuca prolifera +
Endemic  +
Festuca roemeri +
Endemic  +
Festuca rubra subsp. commutata +
Introduced  +
Festuca rubra subsp. rubra +
Introduced  +
Festuca rubra subsp. vallicola +
Endemic  +
Festuca sororia +
Endemic  +
Festuca subulata +
Endemic  +
Festuca subuliflora +
Endemic  +
Festuca thurberi +
Endemic  +
Festuca trachyphylla +
Introduced  +
Festuca versuta +
Endemic  +
Festuca viridula +
Endemic  +
Ficus americana +
Introduced  +
Ficus aurea +
Illustrated  +
Ficus benghalensis +
Introduced  +, Illustrated  +
Ficus benjamina +
Introduced  +, Illustrated  +
Ficus carica +
Introduced  +, Illustrated  +, W1  +
Ficus elastica +
Introduced  +
Ficus microcarpa +
Introduced  +, Illustrated  +
Ficus pumila +
Introduced  +
Ficus religiosa +
Introduced  +
Filago pyramidata var. pyramidata +
Introduced  +, Illustrated  +
Filago vulgaris +
Introduced  +, Illustrated  +
Filipendula occidentalis +
Conservation concern  +, Endemic  +
Filipendula rubra +
Endemic  +, Illustrated  +
Filipendula ulmaria +
Introduced  +
Filipendula vulgaris +
Introduced  +
Fimbristylis annua +
W1  +, Illustrated  +
Fimbristylis autumnalis +
W1  +, Illustrated  +, Endemic  +
Fimbristylis caroliniana +
Illustrated  +
Fimbristylis castanea +
Illustrated  +
Fimbristylis cymosa +
Illustrated  +
Fimbristylis decipiens +
Illustrated  +, Endemic  +
Fimbristylis dichotoma +
W1  +, Introduced  +, Illustrated  +
Fimbristylis miliacea +
W2  +, W1  +, Introduced  +, …
Fimbristylis perpusilla +
Illustrated  +, Endemic  +, Conservation concern  +
Fimbristylis puberula +
Illustrated  +, Endemic  +
Fimbristylis puberula var. interior +
Illustrated  +, Endemic  +
Fimbristylis puberula var. puberula +
Illustrated  +, Endemic  +
Fimbristylis schoenoides +
Introduced  +, Illustrated  +
Fimbristylis squarrosa +
Introduced  +, Illustrated  +
Fimbristylis thermalis +
Illustrated  +
Fimbristylis tomentosa +
Introduced  +, Illustrated  +
Fimbristylis vahlii +
Illustrated  +
Firmiana +
Introduced  +
Firmiana simplex +
Introduced  +, Illustrated  +
Flacourtia indica +
Introduced  +, Illustrated  +
Flaveria bidentis +
Introduced  +
Flaveria brownii +
Endemic  +
Flaveria campestris +
Illustrated  +, Endemic  +
Flaveria chlorifolia +
Illustrated  +
Flaveria floridana +
Endemic  +
Flaveria mcdougallii +
Endemic  +
Flaveria trinervia +
Illustrated  +
Fleischmannia incarnata +
Illustrated  +
Floerkea proserpinacoides +
Illustrated  +, Endemic  +
Florestina tripteris +
Illustrated  +
Flourensia cernua +
Illustrated  +
Flueggea +
Introduced  +
Flueggea virosa +
Introduced  +, Illustrated  +
Flueggea virosa subsp. virosa +
Introduced  +, Illustrated  +
Flyriella parryi +
Illustrated  +
Fontinalis antipyretica +
Illustrated  +
Fontinalis howellii +
Endemic  +
Fontinalis neomexicana +
Endemic  +, Illustrated  +
Fontinalis novae-angliae +
Endemic  +
Fontinalis redfearnii +
Endemic  +
Fontinalis sphagnifolia +
Endemic  +
Fontinalis welchiana +
Endemic  +, Illustrated  +
Forsstroemia producta +
Illustrated  +
Fothergilla gardenii +
Endemic  +, Illustrated  +
Fothergilla major +
Endemic  +, Illustrated  +
Fragaria chiloensis subsp. lucida +
Endemic  +
Fragaria chiloensis subsp. pacifica +
Endemic  +
Fragaria vesca +
Illustrated  +
Fragaria vesca subsp. americana +
Endemic  +, Illustrated  +
Fragaria vesca subsp. bracteata +
Illustrated  +
Fragaria vesca subsp. californica +
Illustrated  +
Fragaria vesca subsp. vesca +
Illustrated  +
Fragaria virginiana +
Endemic  +, Illustrated  +
Fragaria virginiana subsp. glauca +
Endemic  +
Fragaria virginiana subsp. grayana +
Endemic  +
Fragaria virginiana subsp. platypetala +
Endemic  +
Fragaria virginiana subsp. virginiana +
Endemic  +, Illustrated  +
Frangula alnus +
Introduced  +
Frangula betulifolia +
Illustrated  +
Frangula californica subsp. californica +
Endemic  +
Frangula californica subsp. crassifolia +
Endemic  +
Frangula californica subsp. cuspidata +
Endemic  +
Frangula californica subsp. occidentalis +
Endemic  +
Frangula caroliniana +
Endemic  +
Frangula obovata +
Endemic  +
Frangula purshiana +
Endemic  +
Frangula purshiana subsp. anonifolia +
Endemic  +
Frangula purshiana subsp. purshiana +
Endemic  +
Frangula purshiana subsp. ultramafica +
Endemic  +
Frangula rubra +
Endemic  +
Frangula rubra subsp. modocensis +
Endemic  +
Frangula rubra subsp. nevadensis +
Endemic  +
Frangula rubra subsp. obtusissima +
Endemic  +
Frangula rubra subsp. rubra +
Endemic  +
Frangula rubra subsp. yosemitana +
Endemic  +
Frankenia jamesii +
Endemic  +
Frankenia johnstonii +
Conservation concern  +
Frankenia pulverulenta +
Introduced  +
Frankenia salina +
Illustrated  +
Franklinia alatamaha +
Illustrated  +, Endemic  +
Frasera ackermaniae +
Endemic  +, Conservation concern  +
Frasera albicaulis +
Illustrated  +, Endemic  +
Frasera albicaulis var. albicaulis +
Illustrated  +, Endemic  +
Frasera albicaulis var. cusickii +
Endemic  +
Frasera albicaulis var. idahoensis +
Endemic  +, Conservation concern  +
Frasera albicaulis var. modocensis +
Endemic  +
Frasera albicaulis var. nitida +
Endemic  +
Frasera albomarginata +
Endemic  +
Frasera albomarginata var. albomarginata +
Endemic  +
Frasera albomarginata var. induta +
Endemic  +
Frasera caroliniensis +
Illustrated  +, Endemic  +
Frasera coloradensis +
Endemic  +, Conservation concern  +
Frasera fastigiata +
Endemic  +
Frasera gypsicola +
Endemic  +, Conservation concern  +
Frasera montana +
Endemic  +
Frasera neglecta +
Endemic  +
Frasera paniculata +
Endemic  +
Frasera puberulenta +
Endemic  +
Frasera tubulosa +
Endemic  +
Frasera umpquaensis +
Endemic  +, Conservation concern  +
Freesia alba +
Introduced  +, Illustrated  +
Freesia laxa +
Introduced  +
Fremontodendron californicum +
Introduced  +, Illustrated  +
Fremontodendron decumbens +
Conservation concern  +, Endemic  +
Fremontodendron mexicanum +
Conservation concern  +
Fritillaria affinis +
Illustrated  +, Endemic  +
Fritillaria agrestis +
Illustrated  +, Endemic  +
Fritillaria atropurpurea +
Illustrated  +, Endemic  +
Fritillaria biflora +
Endemic  +
Fritillaria biflora var. biflora +
Endemic  +
Fritillaria biflora var. ineziana +
Endemic  +
Fritillaria brandegeei +
Endemic  +, Conservation concern  +
Fritillaria eastwoodiae +
Endemic  +
Fritillaria falcata +
Endemic  +, Conservation concern  +
Fritillaria gentneri +
Endemic  +, Conservation concern  +
Fritillaria glauca +
Endemic  +
Fritillaria liliacea +
Endemic  +, Conservation concern  +
Fritillaria micrantha +
Endemic  +
Fritillaria ojaiensis +
Endemic  +, Conservation concern  +
Fritillaria pinetorum +
Endemic  +
Fritillaria pluriflora +
Endemic  +, Conservation concern  +
Fritillaria pudica +
Illustrated  +, Endemic  +
Fritillaria purdyi +
Endemic  +
Fritillaria recurva +
Illustrated  +, Endemic  +
Fritillaria striata +
Endemic  +, Conservation concern  +
Fritillaria viridea +
Endemic  +
Froelichia drummondii +
Endemic  +
Froelichia floridana +
Illustrated  +
Froelichia gracilis +
Illustrated  +
Fryxellia +
Conservation concern  +
Fryxellia pygmaea +
Conservation concern  +, Illustrated  +
Fuirena breviseta +
W1  +, Illustrated  +
Fuirena bushii +
Illustrated  +, Endemic  +
Fuirena longa +
Illustrated  +, Endemic  +
Fuirena pumila +
W1  +, Illustrated  +, Endemic  +
Fuirena scirpoidea +
W1  +, Illustrated  +
Fuirena simplex +
W1  +, Illustrated  +
Fuirena simplex var. aristulata +
Illustrated  +, Endemic  +
Fuirena simplex var. simplex +
Illustrated  +
Fuirena squarrosa +
W1  +, Illustrated  +, Endemic  +
Fumaria capreolata +
Introduced  +
Fumaria officinalis +
W2  +, Introduced  +, Illustrated  +
Fumaria vaillantii +
Introduced  +
Funastrum cynanchoides +
Weedy  +, Illustrated  +
Funastrum utahense +
Endemic  +
Furcraea foetida +
Introduced  +, Illustrated  +
Furcraea selloa +
Introduced  +
G
Gaillardia aestivalis +
Endemic  +
Gaillardia amblyodon +
Endemic  +
Gaillardia aristata +
Illustrated  +, Endemic  +
Gaillardia multiceps +
Endemic  +
Gaillardia parryi +
Endemic  +
Gaillardia pulchella +
Illustrated  +
Gaillardia spathulata +
Endemic  +
Galactia brachypoda +
Illustrated  +
Galactia elliottii +
Endemic  +
Galactia erecta +
Endemic  +
Galactia fasciculata +
Endemic  +
Galactia floridana +
Illustrated  +, Endemic  +
Galactia microphylla +
Endemic  +
Galactia minor +
Endemic  +
Galactia mollis +
Endemic  +
Galactia pinetorum +
Endemic  +, Conservation concern  +
Galactia regularis +
Illustrated  +, Endemic  +
Galactia smallii +
Endemic  +, Conservation concern  +
Galactia volubilis +
Illustrated  +, Endemic  +
Galearis spectabilis +
Illustrated  +, Endemic  +
Galega +
Introduced  +
Galega officinalis +
Weedy  +, Introduced  +, Illustrated  +
Galenia pubescens +
Introduced  +, Illustrated  +
Galenia secunda +
Introduced  +
Galinsoga parviflora +
Weedy  +, Illustrated  +
Galinsoga parviflora var. parviflora +
Weedy  +, Introduced  +, Illustrated  +
Galinsoga parviflora var. semicalva +
Weedy  +, Illustrated  +
Galinsoga quadriradiata +
Weedy  +, Introduced  +, Illustrated  +
Galphimia angustifolia +
Illustrated  +
Gambelia +
Conservation concern  +
Gambelia speciosa +
Conservation concern  +, Illustrated  +
Gamochaeta calviceps +
Illustrated  +
Gamochaeta coarctata +
Introduced  +, Illustrated  +
Gamochaeta pensylvanica +
Illustrated  +
Gamochaeta simplicicaulis +
Introduced  +
Gamochaeta stachydifolia +
Introduced  +
Gamochaeta ustulata +
Endemic  +
Garberia heterophylla +
Illustrated  +, Endemic  +, Conservation concern  +
Garrya buxifolia +
Endemic  +
Garrya elliptica +
Endemic  +
Garrya fremontii +
Endemic  +
Garrya veatchii +
Illustrated  +
Garrya wrightii +
Illustrated  +
Gastridium phleoides +
Introduced  +
Gaultheria hispidula +
Endemic  +
Gaultheria humifusa +
Endemic  +
Gaultheria ovatifolia +
Endemic  +
Gaultheria procumbens +
Endemic  +
Gaultheria shallon +
Illustrated  +, Endemic  +
Gaylussacia baccata +
Endemic  +
Gaylussacia brachycera +
Endemic  +
Gaylussacia dumosa +
Endemic  +
Gaylussacia frondosa +
Illustrated  +, Endemic  +
Gaylussacia mosieri +
Endemic  +
Gaylussacia nana +
Endemic  +
Gaylussacia ursina +
Illustrated  +, Endemic  +
Gazania linearis +
Introduced  +, Illustrated  +
Gelsemium rankinii +
Illustrated  +, Endemic  +
Gelsemium sempervirens +
Illustrated  +
Gemmabryum californicum +
Endemic  +
Gemmabryum exile +
Illustrated  +
Gemmabryum valparaisense +
Illustrated  +
Genista +
Introduced  +
Genista canariensis +
Weedy  +, Introduced  +
Genista linifolia +
Introduced  +
Genista maderensis +
Introduced  +
Genista monspessulana +
Weedy  +, Introduced  +
Genista tinctoria +
Introduced  +, Illustrated  +
Genistidium dumosum +
Illustrated  +, Conservation concern  +
Gentiana affinis +
Endemic  +
Gentiana affinis var. affinis +
Endemic  +
Gentiana affinis var. ovata +
Endemic  +
Gentiana algida +
Illustrated  +
Gentiana andrewsii +
Illustrated  +, Endemic  +
Gentiana andrewsii var. andrewsii +
Illustrated  +, Endemic  +
Gentiana andrewsii var. dakotica +
Endemic  +
Gentiana austromontana +
Endemic  +
Gentiana autumnalis +
Illustrated  +, Endemic  +
Gentiana calycosa +
Endemic  +
Gentiana catesbaei +
Endemic  +
Gentiana clausa +
Endemic  +
Gentiana decora +
Endemic  +
Gentiana douglasiana +
Endemic  +
Gentiana flavida +
Endemic  +
Gentiana fremontii +
Endemic  +
Gentiana glauca +
Illustrated  +
Gentiana latidens +
Endemic  +, Conservation concern  +
Gentiana linearis +
Endemic  +
Gentiana newberryi +
Endemic  +
Gentiana newberryi var. newberryi +
Endemic  +
Gentiana newberryi var. tiogana +
Endemic  +
Gentiana parryi +
Endemic  +
Gentiana pennelliana +
Endemic  +, Conservation concern  +
Gentiana platypetala +
Endemic  +
Gentiana plurisetosa +
Endemic  +, Conservation concern  +
Gentiana prostrata +
Illustrated  +
Gentiana prostrata var. prostrata +
Illustrated  +
Gentiana puberulenta +
Endemic  +
Gentiana rubricaulis +
Endemic  +
Gentiana saponaria +
Endemic  +
Gentiana sceptrum +
Endemic  +
Gentiana setigera +
Endemic  +, Conservation concern  +
Gentiana villosa +
Endemic  +
Gentianella amarella +
Illustrated  +
Gentianella amarella subsp. acuta +
Illustrated  +
Gentianella heterosepala subsp. heterosepala +
Endemic  +
Gentianella propinqua subsp. aleutica +
Endemic  +, Conservation concern  +
Gentianella quinquefolia +
Illustrated  +, Endemic  +
Gentianella quinquefolia subsp. occidentalis +
Endemic  +
Gentianella quinquefolia subsp. quinquefolia +
Illustrated  +, Endemic  +
Gentianella tortuosa +
Endemic  +
Gentianella wislizeni +
Conservation concern  +
Gentianopsis barbellata +
Endemic  +
Gentianopsis crinita +
Illustrated  +, Endemic  +
Gentianopsis detonsa subsp. nesophila +
Endemic  +
Gentianopsis detonsa subsp. raupii +
Endemic  +
Gentianopsis detonsa subsp. yukonensis +
Endemic  +
Gentianopsis holopetala +
Endemic  +
Gentianopsis simplex +
Endemic  +
Gentianopsis thermalis +
Endemic  +
Gentianopsis virgata +
Endemic  +
Gentianopsis virgata subsp. macounii +
Endemic  +
Gentianopsis virgata subsp. victorinii +
Endemic  +, Conservation concern  +
Gentianopsis virgata subsp. virgata +
Endemic  +
Geocarpon minimum +
Illustrated  +, Endemic  +, Conservation concern  +
Geocaulon +
Endemic  +
Geocaulon lividum +
Endemic  +, Illustrated  +
Geraea canescens +
Illustrated  +
Geum aleppicum +
Illustrated  +
Geum geniculatum +
Conservation concern  +, Endemic  +
Geum laciniatum +
Endemic  +
Geum macrophyllum var. perincisum +
Endemic  +
Geum peckii +
Conservation concern  +, Endemic  +
Geum radiatum +
Conservation concern  +, Endemic  +
Geum schofieldii +
Conservation concern  +, Endemic  +
Geum triflorum +
Illustrated  +
Geum triflorum var. ciliatum +
Endemic  +
Geum triflorum var. triflorum +
Illustrated  +
Geum urbanum +
Introduced  +
Geum vernum +
Endemic  +, Illustrated  +
Geum virginianum +
Endemic  +
Gibasis pellucida +
Introduced  +, Illustrated  +
Gillenia +
Endemic  +
Gillenia stipulata +
Endemic  +, Illustrated  +
Gillenia trifoliata +
Endemic  +
Gilmania luteola +
Illustrated  +, Endemic  +, Conservation concern  +
Glabra +
Endemic  +
Gladiolus communis +
Introduced  +
Gladiolus dalenii +
Introduced  +, Illustrated  +
Gladiolus dalenii subsp. dalenii +
Introduced  +, Illustrated  +
Gladiolus italicus +
Introduced  +
Gladiolus tristis +
Introduced  +
Glandulicactus uncinatus +
Illustrated  +
Glandulicactus uncinatus var. wrightii +
Illustrated  +
Glaucium corniculatum +
Introduced  +, W2  +
Glaucium flavum +
Introduced  +, Illustrated  +
Glebionis coronaria +
Introduced  +
Glebionis segetum +
Introduced  +, Illustrated  +
Gleditsia +
Endemic  +
Gleditsia aquatica +
Endemic  +
Gleditsia triacanthos +
Weedy  +, Illustrated  +, Endemic  +
Glinus lotoides +
Introduced  +, Illustrated  +
Glinus radiatus +
Illustrated  +
Gliricidia +
Introduced  +
Gliricidia sepium +
Introduced  +, Illustrated  +
Glochidion +
Introduced  +
Glochidion puberum +
Introduced  +, Illustrated  +
Glossopetalon clokeyi +
Conservation concern  +, Endemic  +
Glossopetalon pungens +
Conservation concern  +, Endemic  +
Glossopetalon spinescens +
Illustrated  +
Glossopetalon spinescens var. aridum +
Endemic  +, Illustrated  +
Glossopetalon spinescens var. meionandrum +
Endemic  +
Glossopetalon spinescens var. microphyllum +
Endemic  +
Glossopetalon spinescens var. planitierum +
Endemic  +
Glossopetalon spinescens var. spinescens +
Illustrated  +
Glossopetalon texense +
Conservation concern  +, Endemic  +
Glossostigma +
Introduced  +
Glossostigma cleistanthum +
Introduced  +, Illustrated  +
Glyceria acutiflora +
Endemic  +
Glyceria canadensis +
Endemic  +
Glyceria canadensis var. canadensis +
Endemic  +
Glyceria canadensis var. laxa +
Endemic  +
Glyceria declinata +
Introduced  +
Glyceria elata +
Endemic  +
Glyceria fluitans +
Introduced  +
Glyceria grandis +
Endemic  +
Glyceria grandis var. grandis +
Endemic  +
Glyceria grandis var. komarovii +
Endemic  +
Glyceria leptostachya +
Endemic  +
Glyceria maxima +
Introduced  +
Glyceria melicaria +
Endemic  +
Glyceria nubigena +
Endemic  +
Glyceria obtusa +
Endemic  +
Glyceria pulchella +
Endemic  +
Glyceria septentrionalis +
Endemic  +
Glyceria septentrionalis var. arkansana +
Endemic  +
Glyceria septentrionalis var. septentrionalis +
Endemic  +
Glycine +
Introduced  +
Glycine max +
Weedy  +, Introduced  +, Illustrated  +
Glycyrrhiza glabra +
Introduced  +
Glycyrrhiza lepidota +
Weedy  +, Illustrated  +
Glyptopleura marginata +
Endemic  +
Glyptopleura setulosa +
Illustrated  +, Endemic  +
Gnaphalium uliginosum +
Introduced  +, Illustrated  +
Gochnatia hypoleuca +
Illustrated  +
Gollania turgens +
Illustrated  +
Gomphrena caespitosa +
Illustrated  +
Gomphrena globosa +
Introduced  +
Gomphrena haageana +
Illustrated  +
Gomphrena nealleyi +
Illustrated  +, Endemic  +
Gonolobus suberosus +
Illustrated  +, Endemic  +
Gonolobus suberosus var. granulatus +
Endemic  +
Gonolobus suberosus var. suberosus +
Illustrated  +, Endemic  +
Gonolobus taylorianus +
Introduced  +
Goodmania luteola +
Illustrated  +, Endemic  +
Goodyera oblongifolia +
Illustrated  +
Goodyera pubescens +
Endemic  +
Goodyera repens +
Illustrated  +
Goodyera tesselata +
Endemic  +
Gordonia lasianthus +
Illustrated  +, Endemic  +
Gossypianthus lanuginosus +
Illustrated  +
Gossypianthus lanuginosus var. lanuginosus +
Illustrated  +
Gossypianthus lanuginosus var. tenuiflorus +
Endemic  +
Gossypium armourianum +
Introduced  +
Gossypium hirsutum +
Introduced  +, Weedy  +
Gossypium thurberi +
Illustrated  +
Gouania lupuloides +
Illustrated  +
Grammitis nimbata +
Illustrated  +
Graptopetalum bartramii +
Illustrated  +
Gratiola amphiantha +
Endemic  +, Conservation concern  +
Gratiola brevifolia +
Endemic  +
Gratiola ebracteata +
Endemic  +
Gratiola floridana +
Endemic  +
Gratiola graniticola +
Endemic  +
Gratiola heterosepala +
Endemic  +, Conservation concern  +
Gratiola lutea +
Endemic  +
Gratiola neglecta +
Endemic  +, Illustrated  +
Gratiola quartermaniae +
Endemic  +
Gratiola ramosa +
Endemic  +
Gratiola torreyi +
Endemic  +
Gratiola virginiana +
Endemic  +
Gratiola viscidula +
Endemic  +, Illustrated  +
Grayia spinosa +
Illustrated  +, Endemic  +
Grindelia adenodonta +
Endemic  +
Grindelia arizonica +
Illustrated  +
Grindelia ciliata +
Illustrated  +, Endemic  +
Grindelia decumbens +
Endemic  +
Grindelia fraxinipratensis +
Endemic  +, Conservation concern  +
Grindelia havardii +
Endemic  +
Grindelia hirsutula +
Endemic  +
Grindelia howellii +
Endemic  +, Conservation concern  +
Grindelia integrifolia +
Endemic  +
Grindelia lanceolata +
Endemic  +
Grindelia microcephala +
Endemic  +
Grindelia squarrosa +
Illustrated  +
Grindelia subalpina +
Endemic  +
Groutiella tumidula +
Illustrated  +
Grusonia clavata +
Illustrated  +, Endemic  +
Grusonia emoryi +
Illustrated  +
Grusonia kunzei +
Illustrated  +
Grusonia parishii +
Endemic  +
Grusonia pulchella +
Illustrated  +, Endemic  +
Guaiacum angustifolium +
Illustrated  +
Guaiacum sanctum +
Conservation concern  +
Guapira discolor +
Illustrated  +
Guardiola platyphylla +
Illustrated  +
Guilandina bonduc +
Weedy  +, Introduced  +
Guilandina major +
Illustrated  +
Guilleminea densa +
Weedy  +, Illustrated  +
Guilleminea densa var. aggregata +
Illustrated  +
Guizotia abyssinica +
Introduced  +, Illustrated  +
Gundlachia triantha +
Illustrated  +
Gutierrezia petradoria +
Endemic  +
Gutierrezia pomariensis +
Endemic  +
Gutierrezia sarothrae +
Illustrated  +
Gutierrezia serotina +
Endemic  +
Gutierrezia wrightii +
Illustrated  +
Guzmania monostachia +
Illustrated  +
Guzmania monostachia var. monostachia +
Illustrated  +
Guzmania monostachia var. variegata +
Illustrated  +
Gyminda latifolia +
Illustrated  +
Gymnanthes lucida +
Illustrated  +
Gymnocarpium jessoense +
Illustrated  +
Gymnocarpium jessoense subsp. parvulum +
Illustrated  +
Gymnocarpium robertianum +
Illustrated  +
Gymnocladus +
Endemic  +
Gymnocladus dioicus +
Illustrated  +, Endemic  +
Gymnopogon brevifolius +
Endemic  +
Gymnopogon chapmanianus +
Endemic  +
Gymnosperma glutinosum +
Illustrated  +
Gynerium sagittatum +
Introduced  +
Gynura aurantiaca +
Introduced  +, Illustrated  +
Gypsophila elegans +
Introduced  +
Gypsophila muralis +
Introduced  +
Gypsophila paniculata +
Weedy  +, Introduced  +, Illustrated  +
Gypsophila scorzonerifolia +
Introduced  +, Illustrated  +
Gyrandra blumbergiana +
Illustrated  +, Endemic  +, Conservation concern  +
H
Habenaria odontopetala +
Illustrated  +
Habenaria quinqueseta +
Illustrated  +
Habenaria repens +
Illustrated  +
Habranthus robustus +
Introduced  +
Habranthus tubispathus +
Illustrated  +
Hackelochloa granularis +
Introduced  +
Hageniella micans +
Illustrated  +
Hainardia cylindrica +
Introduced  +
Halenia deflexa +
Illustrated  +, Endemic  +
Halesia carolina +
Illustrated  +, Endemic  +
Halesia diptera +
Illustrated  +, Endemic  +
Halimodendron +
Introduced  +
Halimodendron halodendron +
Introduced  +, Illustrated  +
Halodule wrightii +
Illustrated  +
Halogeton glomeratus +
Weedy  +, Introduced  +, Illustrated  +
Halophila engelmannii +
Illustrated  +
Halophila johnsonii +
Endemic  +, Conservation concern  +
Hamamelis vernalis +
Endemic  +
Hamamelis virginiana +
Illustrated  +, Endemic  +
Hamatocactus bicolor +
Illustrated  +
Hamatocaulis lapponicus +
Illustrated  +
Haplocladium angustifolium +
Illustrated  +
Haplodontium macrocarpum +
Illustrated  +
Haplodontium tehamense +
Endemic  +, Illustrated  +
Haplophyton crooksii +
Illustrated  +
Harmonia doris-nilesiae +
Endemic  +, Conservation concern  +
Harmonia hallii +
Illustrated  +, Endemic  +, Conservation concern  +
Harmonia nutans +
Endemic  +, Conservation concern  +
Harmonia stebbinsii +
Endemic  +, Conservation concern  +
Harperocallis flava +
Illustrated  +, Endemic  +, Conservation concern  +
Harrimanella stelleriana +
Illustrated  +
Harrisella porrecta +
Illustrated  +
Harrisia aboriginum +
Illustrated  +, Endemic  +, Conservation concern  +
Harrisia fragrans +
Endemic  +, Conservation concern  +
Harrisia simpsonii +
Endemic  +, Conservation concern  +
Hartwrightia floridana +
Illustrated  +, Endemic  +, Conservation concern  +
Hasteola robertiorum +
Endemic  +
Hasteola suaveolens +
Illustrated  +, Endemic  +
Hastingsia alba +
Illustrated  +, Endemic  +
Hastingsia atropurpurea +
Endemic  +, Conservation concern  +
Hastingsia bracteosa +
Endemic  +, Conservation concern  +
Hastingsia serpentinicola +
Endemic  +
Havardia pallens +
Illustrated  +
Hazardia brickellioides +
Endemic  +
Hazardia detonsa +
Endemic  +
Hazardia squarrosa +
Illustrated  +
Hazardia squarrosa var. grindelioides +
Illustrated  +
Hazardia squarrosa var. obtusa +
Endemic  +
Hazardia squarrosa var. squarrosa +
Endemic  +
Hazardia whitneyi +
Illustrated  +, Endemic  +
Hazardia whitneyi var. discoidea +
Endemic  +
Hazardia whitneyi var. whitneyi +
Illustrated  +, Endemic  +
Hecastocleis shockleyi +
Illustrated  +, Endemic  +
Hechtia glomerata +
Illustrated  +
Hedwigia ciliata +
Illustrated  +
Hedwigia detonsa +
Endemic  +, Illustrated  +
Hedwigia stellata +
Illustrated  +
Hedychium coronarium +
Introduced  +, Illustrated  +
Hedypnois cretica +
Introduced  +, Illustrated  +
Hedysarum boreale +
Endemic  +
Hedysarum boreale subsp. boreale +
Endemic  +
Hedysarum boreale subsp. mackenziei +
Endemic  +
Hedysarum occidentale +
Illustrated  +, Endemic  +
Hedysarum occidentale var. canone +
Endemic  +
Hedysarum occidentale var. occidentale +
Illustrated  +, Endemic  +
Hedysarum sulphurescens +
Endemic  +
Helenium autumnale +
Illustrated  +, Endemic  +
Helenium bigelovii +
Endemic  +
Helenium bolanderi +
Endemic  +
Helenium brevifolium +
Endemic  +
Helenium campestre +
Endemic  +
Helenium drummondii +
Endemic  +
Helenium flexuosum +
Endemic  +
Helenium linifolium +
Endemic  +
Helenium pinnatifidum +
Endemic  +
Helenium vernale +
Illustrated  +, Endemic  +
Helenium virginicum +
Endemic  +, Conservation concern  +
Helianthella californica +
Endemic  +
Helianthella californica subsp. californica +
Endemic  +
Helianthella californica subsp. nevadensis +
Endemic  +
Helianthella californica subsp. shastensis +
Endemic  +
Helianthella castanea +
Endemic  +
Helianthella microcephala +
Endemic  +
Helianthella parryi +
Endemic  +
Helianthella uniflora +
Endemic  +
Helianthus agrestis +
Illustrated  +, Endemic  +
Helianthus angustifolius +
Endemic  +
Helianthus annuus +
Illustrated  +
Helianthus anomalus +
Endemic  +
Helianthus argophyllus +
Endemic  +
Helianthus arizonensis +
Endemic  +
Helianthus atrorubens +
Illustrated  +, Endemic  +
Helianthus bolanderi +
Endemic  +
Helianthus carnosus +
Endemic  +, Conservation concern  +
Helianthus cusickii +
Endemic  +
Helianthus debilis +
Endemic  +
Helianthus debilis subsp. cucumerifolius +
Endemic  +
Helianthus debilis subsp. debilis +
Endemic  +
Helianthus debilis subsp. silvestris +
Endemic  +
Helianthus debilis subsp. tardiflorus +
Endemic  +
Helianthus debilis subsp. vestitus +
Endemic  +, Conservation concern  +
Helianthus decapetalus +
Endemic  +
Helianthus divaricatus +
Endemic  +
Helianthus eggertii +
Endemic  +, Conservation concern  +
Helianthus floridanus +
Endemic  +
Helianthus giganteus +
Endemic  +
Helianthus glaucophyllus +
Endemic  +
Helianthus grosseserratus +
Endemic  +
Helianthus heterophyllus +
Endemic  +
Helianthus laevigatus +
Endemic  +
Helianthus longifolius +
Endemic  +
Helianthus maximiliani +
Illustrated  +
Helianthus microcephalus +
Endemic  +
Helianthus mollis +
Endemic  +
Helianthus neglectus +
Endemic  +, Conservation concern  +
Helianthus niveus +
Conservation concern  +
Helianthus niveus subsp. tephrodes +
Conservation concern  +
Helianthus nuttallii subsp. nuttallii +
Endemic  +
Helianthus nuttallii subsp. parishii +
Endemic  +, Conservation concern  +
Helianthus nuttallii subsp. rydbergii +
Endemic  +
Helianthus occidentalis +
Endemic  +
Helianthus occidentalis subsp. occidentalis +
Endemic  +
Helianthus occidentalis subsp. plantagineus +
Endemic  +
Helianthus paradoxus +
Endemic  +, Conservation concern  +
Helianthus pauciflorus +
Endemic  +
Helianthus pauciflorus subsp. pauciflorus +
Endemic  +
Helianthus pauciflorus subsp. subrhomboideus +
Endemic  +
Helianthus petiolaris +
Illustrated  +, Endemic  +
Helianthus petiolaris subsp. fallax +
Endemic  +
Helianthus petiolaris subsp. petiolaris +
Illustrated  +, Endemic  +
Helianthus porteri +
Illustrated  +, Endemic  +
Helianthus praecox subsp. hirtus +
Endemic  +, Conservation concern  +
Helianthus praecox subsp. praecox +
Endemic  +, Conservation concern  +
Helianthus praecox subsp. runyonii +
Endemic  +
Helianthus pumilus +
Endemic  +
Helianthus radula +
Illustrated  +, Endemic  +
Helianthus resinosus +
Illustrated  +, Endemic  +
Helianthus salicifolius +
Endemic  +
Helianthus schweinitzii +
Endemic  +, Conservation concern  +
Helianthus silphioides +
Endemic  +
Helianthus simulans +
Endemic  +
Helianthus smithii +
Endemic  +, Conservation concern  +
Helianthus strumosus +
Endemic  +
Helianthus tuberosus +
Endemic  +
Helianthus verticillatus +
Endemic  +, Conservation concern  +
Heliconia latispatha +
Introduced  +, Illustrated  +
Helictotrichon mortonianum +
Endemic  +
Heliomeris multiflora +
Illustrated  +
Heliomeris multiflora var. brevifolia +
Endemic  +
Heliomeris multiflora var. multiflora +
Illustrated  +
Heliomeris multiflora var. nevadensis +
Illustrated  +
Heliomeris soliceps +
Endemic  +, Conservation concern  +
Heliopsis gracilis +
Endemic  +
Heliopsis helianthoides +
Illustrated  +, Endemic  +
Heliopsis helianthoides var. helianthoides +
Endemic  +
Heliopsis helianthoides var. scabra +
Illustrated  +, Endemic  +
Helleborus viridis +
Introduced  +, Illustrated  +
Helminthotheca echioides +
Introduced  +, Illustrated  +
Helonias bullata +
Illustrated  +, Endemic  +
Hemarthria altissima +
Introduced  +
Hemerocallis fulva +
Introduced  +, Illustrated  +
Hemerocallis lilioasphodelus +
Introduced  +
Hemitomes congestum +
Illustrated  +, Endemic  +
Hemizonella minima +
Illustrated  +, Endemic  +
Hemizonia congesta +
Illustrated  +, Endemic  +
Hemizonia congesta subsp. calyculata +
Endemic  +, Conservation concern  +
Hemizonia congesta subsp. clevelandii +
Endemic  +
Hemizonia congesta subsp. congesta +
Endemic  +, Conservation concern  +
Hemizonia congesta subsp. lutescens +
Endemic  +
Hemizonia congesta subsp. luzulifolia +
Illustrated  +, Endemic  +
Hemizonia congesta subsp. tracyi +
Endemic  +, Conservation concern  +
Henicodium geniculatum +
Illustrated  +
Herbertia lahue +
Illustrated  +
Herissantia crispa +
Illustrated  +
Hermannia pauciflora +
Conservation concern  +, Illustrated  +
Hermbstaedtia odorata +
Introduced  +, Illustrated  +
Herniaria glabra +
Introduced  +
Herniaria hirsuta +
Introduced  +, Illustrated  +
Herniaria hirsuta var. cinerea +
Introduced  +, Illustrated  +
Herniaria hirsuta var. hirsuta +
Introduced  +, Illustrated  +
Herpetineuron toccoae +
Illustrated  +
Herrickia glauca +
Endemic  +
Herrickia glauca var. glauca +
Endemic  +
Herrickia glauca var. pulchra +
Endemic  +
Herrickia horrida +
Illustrated  +, Endemic  +, Conservation concern  +
Herrickia kingii +
Endemic  +
Herrickia kingii var. barnebyana +
Endemic  +
Herrickia kingii var. kingii +
Endemic  +
Herrickia wasatchensis +
Endemic  +
Herzogiella adscendens +
Illustrated  +
Herzogiella striatella +
Illustrated  +
Hesperaloe parviflora +
Illustrated  +
Hesperevax acaulis +
Endemic  +
Hesperevax acaulis var. acaulis +
Endemic  +
Hesperevax acaulis var. ambusticola +
Endemic  +
Hesperevax acaulis var. robustior +
Endemic  +
Hesperevax caulescens +
Illustrated  +, Endemic  +
Hesperevax sparsiflora +
Illustrated  +, Endemic  +
Hesperevax sparsiflora var. brevifolia +
Endemic  +
Hesperevax sparsiflora var. sparsiflora +
Illustrated  +, Endemic  +
Hesperis matronalis +
Weedy  +, Introduced  +, Illustrated  +
Hesperocallis undulata +
Illustrated  +, Endemic  +
Hesperocnide tenella +
Illustrated  +
Hesperolinon adenophyllum +
Endemic  +, Conservation concern  +
Hesperolinon bicarpellatum +
Endemic  +, Conservation concern  +
Hesperolinon breweri +
Endemic  +, Conservation concern  +
Hesperolinon californicum +
Endemic  +
Hesperolinon clevelandii +
Endemic  +
Hesperolinon congestum +
Endemic  +, Conservation concern  +
Hesperolinon didymocarpum +
Endemic  +, Conservation concern  +
Hesperolinon disjunctum +
Endemic  +, Illustrated  +
Hesperolinon drymarioides +
Endemic  +, Conservation concern  +
Hesperolinon sharsmithiae +
Endemic  +, Conservation concern  +
Hesperolinon spergulinum +
Endemic  +
Hesperolinon tehamense +
Endemic  +, Conservation concern  +, Illustrated  +
Hesperomecon linearis +
Endemic  +, Illustrated  +
Hesperoyucca newberryi +
Endemic  +
Hesperoyucca whipplei +
Illustrated  +
Heteranthera dubia +
W2  +, W1  +, Illustrated  +
Heteranthera limosa +
W2  +, W1  +
Heteranthera mexicana +
Illustrated  +
Heteranthera reniformis +
W2  +, W1  +
Heterocladium dimorphum +
Illustrated  +
Heterocladium macounii +
Illustrated  +
Heterocladium procurrens +
Endemic  +, Illustrated  +
Heteromeles +
Endemic  +
Heteromeles arbutifolia +
Illustrated  +
Heterophyllium affine +
Illustrated  +
Heteropogon contortus +
Introduced  +
Heteropogon melanocarpus +
Introduced  +
Heteropterys +
Introduced  +
Heteropterys brachiata +
Introduced  +, Illustrated  +
Heterosavia bahamensis +
Illustrated  +
Heterotheca camporum +
Endemic  +
Heterotheca camporum var. camporum +
Endemic  +
Heterotheca camporum var. glandulissima +
Endemic  +
Heterotheca canescens +
Endemic  +
Heterotheca fulcrata var. amplifolia +
Endemic  +
Heterotheca fulcrata var. fulcrata +
Endemic  +
Heterotheca grandiflora +
Endemic  +
Heterotheca jonesii +
Endemic  +, Conservation concern  +
Heterotheca oregona +
Endemic  +
Heterotheca oregona var. compacta +
Endemic  +
Heterotheca oregona var. oregona +
Endemic  +
Heterotheca oregona var. rudis +
Endemic  +
Heterotheca oregona var. scaberrima +
Endemic  +
Heterotheca pumila +
Endemic  +
Heterotheca rutteri +
Conservation concern  +
Heterotheca sessiliflora +
Illustrated  +
Heterotheca sessiliflora subsp. bolanderi +
Endemic  +, Conservation concern  +
Heterotheca sessiliflora subsp. echioides +
Illustrated  +, Endemic  +
Heterotheca sessiliflora subsp. fastigiata +
Endemic  +
Heterotheca sessiliflora subsp. sessiliflora +
Illustrated  +
Heterotheca shevockii +
Endemic  +, Conservation concern  +
Heterotheca stenophylla +
Endemic  +
Heterotheca stenophylla var. angustifolia +
Endemic  +
Heterotheca stenophylla var. stenophylla +
Endemic  +
Heterotheca subaxillaris +
Illustrated  +
Heterotheca subaxillaris subsp. latifolia +
Illustrated  +
Heterotheca subaxillaris subsp. subaxillaris +
Illustrated  +
Heterotheca villosa +
Illustrated  +, Endemic  +
Heterotheca villosa var. ballardii +
Endemic  +
Heterotheca villosa var. depressa +
Endemic  +, Conservation concern  +
Heterotheca villosa var. foliosa +
Endemic  +
Heterotheca villosa var. minor +
Illustrated  +, Endemic  +
Heterotheca villosa var. nana +
Endemic  +
Heterotheca villosa var. pedunculata +
Endemic  +
Heterotheca villosa var. scabra +
Endemic  +
Heterotheca villosa var. sierrablancensis +
Illustrated  +, Endemic  +
Heterotheca villosa var. villosa +
Endemic  +
Heterotheca viscida +
Endemic  +
Heterotheca zionensis +
Endemic  +, Conservation concern  +
Heuchera abramsii +
Endemic  +
Heuchera americana +
Illustrated  +, Endemic  +
Heuchera americana var. americana +
Illustrated  +, Endemic  +
Heuchera americana var. hirsuticaulis +
Endemic  +
Heuchera americana var. hispida +
Illustrated  +, Endemic  +
Heuchera bracteata +
Endemic  +
Heuchera brevistaminea +
Endemic  +, Conservation concern  +
Heuchera caespitosa +
Endemic  +, Conservation concern  +
Heuchera chlorantha +
Endemic  +
Heuchera cylindrica +
Illustrated  +, Endemic  +
Heuchera eastwoodiae +
Endemic  +
Heuchera elegans +
Endemic  +
Heuchera glabra +
Endemic  +
Heuchera glomerulata +
Endemic  +
Heuchera hallii +
Endemic  +
Heuchera hirsutissima +
Endemic  +, Conservation concern  +
Heuchera longiflora +
Endemic  +
Heuchera maxima +
Endemic  +, Conservation concern  +
Heuchera merriamii +
Endemic  +
Heuchera micrantha +
Illustrated  +, Endemic  +
Heuchera micrantha var. diversifolia +
Endemic  +
Heuchera micrantha var. erubescens +
Illustrated  +, Endemic  +
Heuchera micrantha var. hartwegii +
Endemic  +
Heuchera micrantha var. macropetala +
Illustrated  +, Endemic  +
Heuchera micrantha var. micrantha +
Endemic  +
Heuchera novamexicana +
Endemic  +
Heuchera parishii +
Endemic  +, Conservation concern  +
Heuchera parviflora +
Endemic  +
Heuchera parviflora var. parviflora +
Endemic  +
Heuchera parviflora var. puberula +
Endemic  +
Heuchera parvifolia +
Illustrated  +, Endemic  +
Heuchera pilosissima +
Endemic  +
Heuchera pubescens +
Endemic  +
Heuchera pulchella +
Endemic  +, Conservation concern  +
Heuchera richardsonii +
Illustrated  +, Endemic  +
Heuchera rubescens +
Illustrated  +
Heuchera villosa +
Endemic  +
Heuchera villosa var. arkansana +
Endemic  +
Heuchera villosa var. villosa +
Endemic  +
Hexalectris revoluta +
Illustrated  +, Conservation concern  +
Hexalectris warnockii +
Illustrated  +, Conservation concern  +
Hexastylis arifolia +
Illustrated  +, Endemic  +
Hexastylis arifolia var. arifolia +
Endemic  +, Illustrated  +
Hexastylis arifolia var. callifolia +
Endemic  +
Hexastylis arifolia var. ruthii +
Endemic  +
Hexastylis contracta +
Endemic  +
Hexastylis lewisii +
Endemic  +
Hexastylis minor +
Endemic  +, Illustrated  +
Hexastylis naniflora +
Conservation concern  +, Endemic  +
Hexastylis rhombiformis +
Conservation concern  +, Endemic  +
Hexastylis shuttleworthii +
Illustrated  +, Endemic  +
Hexastylis shuttleworthii var. harperi +
Conservation concern  +, Endemic  +
Hexastylis shuttleworthii var. shuttleworthii +
Endemic  +, Illustrated  +
Hexastylis speciosa +
Conservation concern  +, Endemic  +
Hexastylis virginica +
Endemic  +
Hibiscus acetosella +
Introduced  +
Hibiscus aculeatus +
Endemic  +, Illustrated  +
Hibiscus coccineus +
Endemic  +
Hibiscus coulteri +
Illustrated  +
Hibiscus dasycalyx +
Conservation concern  +, Endemic  +
Hibiscus grandiflorus +
Illustrated  +
Hibiscus laevis +
Endemic  +
Hibiscus mutabilis +
Introduced  +
Hibiscus radiatus +
Introduced  +
Hibiscus rosa-sinensis +
Introduced  +
Hibiscus schizopetalus +
Introduced  +
Hibiscus syriacus +
Introduced  +
Hibiscus trionum +
Introduced  +, Weedy  +
Hieracium albiflorum +
Illustrated  +
Hieracium argutum +
Endemic  +
Hieracium aurantiacum +
Introduced  +
Hieracium brevipilum +
Endemic  +
Hieracium caespitosum +
Introduced  +, Illustrated  +
Hieracium flagellare +
Introduced  +
Hieracium greenei +
Endemic  +
Hieracium gronovii +
Illustrated  +
Hieracium horridum +
Endemic  +
Hieracium longiberbe +
Endemic  +
Hieracium longipilum +
Endemic  +
Hieracium murorum +
Introduced  +
Hieracium nudicaule +
Endemic  +
Hieracium paniculatum +
Endemic  +
Hieracium parryi +
Endemic  +
Hieracium pilosella +
Introduced  +
Hieracium piloselloides +
Introduced  +
Hieracium robinsonii +
Endemic  +
Hieracium sabaudum +
Introduced  +
Hieracium scabrum +
Illustrated  +, Endemic  +
Hieracium scouleri +
Endemic  +
Hieracium traillii +
Endemic  +
Hieracium triste +
Endemic  +
Hieracium umbellatum +
Illustrated  +
Hieracium venosum +
Endemic  +
Hilaria jamesii +
Endemic  +
Hippeastrum puniceum +
Introduced  +, Illustrated  +
Hippocratea volubilis +
Illustrated  +
Hippomane mancinella +
Illustrated  +
Hippuris lanceolata +
Illustrated  +
Hippuris montana +
Endemic  +
Hippuris tetraphylla +
Illustrated  +
Hippuris vulgaris +
Weedy  +, Illustrated  +
Hiptage +
Introduced  +
Hiptage benghalensis +
Introduced  +, Illustrated  +
Hirschfeldia incana +
Weedy  +, Introduced  +, Illustrated  +
Hoffmannseggia glauca +
Weedy  +, Illustrated  +
Hoffmannseggia repens +
Endemic  +
Hoffmannseggia tenella +
Endemic  +, Conservation concern  +
Hoita macrostachya +
Illustrated  +, Endemic  +
Hoita strobilina +
Endemic  +, Conservation concern  +
Hollisteria lanata +
Illustrated  +, Endemic  +
Holmgrenanthe +
Endemic  +, Conservation concern  +
Holmgrenanthe petrophila +
Endemic  +, Conservation concern  +, Illustrated  +
Holocarpha heermannii +
Endemic  +
Holocarpha macradenia +
Endemic  +, Conservation concern  +
Holocarpha obconica +
Endemic  +
Holocarpha virgata +
Illustrated  +, Endemic  +
Holocarpha virgata subsp. elongata +
Endemic  +, Conservation concern  +
Holocarpha virgata subsp. virgata +
Illustrated  +, Endemic  +
Holodiscus discolor +
Weedy  +, Illustrated  +
Holodiscus discolor var. discolor +
Illustrated  +
Holodiscus discolor var. dumosus +
Weedy  +, Illustrated  +
Holodiscus microphyllus var. glabrescens +
Endemic  +
Holosteum umbellatum +
Weedy  +, Introduced  +, Illustrated  +
Holosteum umbellatum subsp. umbellatum +
Weedy  +, Introduced  +, Illustrated  +
Holozonia filipes +
Illustrated  +, Endemic  +
Homalia trichomanoides +
Illustrated  +
Homalia trichomanoides var. trichomanoides +
Illustrated  +
Homaliadelphus sharpii +
Illustrated  +
Homalotheciella subcapillata +
Endemic  +, Illustrated  +
Homalothecium aeneum +
Endemic  +
Homalothecium californicum +
Endemic  +
Homalothecium fulgescens +
Endemic  +
Homalothecium megaptilum +
Endemic  +
Homalothecium nevadense +
Endemic  +
Homalothecium nuttallii +
Endemic  +, Illustrated  +
Homomallium mexicanum +
Illustrated  +
Homomallium mexicanum var. latifolium +
Illustrated  +
Homomallium mexicanum var. mexicanum +
Illustrated  +
Honckenya peploides +
Illustrated  +
Honckenya peploides subsp. diffusa +
Illustrated  +
Honckenya peploides subsp. major +
Illustrated  +
Honckenya peploides subsp. robusta +
Illustrated  +, Endemic  +
Hookeria acutifolia +
Illustrated  +
Hookeria lucens +
Illustrated  +
Hordeum brachyantherum subsp. californicum +
Endemic  +
Hordeum depressum +
Endemic  +
Hordeum marinum +
Introduced  +
Hordeum marinum subsp. gussoneanum +
Introduced  +
Hordeum marinum subsp. marinum +
Introduced  +
Hordeum murinum +
Introduced  +
Hordeum murinum subsp. glaucum +
Introduced  +
Hordeum murinum subsp. leporinum +
Introduced  +
Hordeum murinum subsp. murinum +
Introduced  +
Hordeum vulgare +
Introduced  +
Horkelia bolanderi +
Conservation concern  +, Endemic  +
Horkelia californica +
Endemic  +, Illustrated  +
Horkelia californica var. californica +
Endemic  +, Illustrated  +
Horkelia californica var. elata +
Endemic  +
Horkelia californica var. frondosa +
Endemic  +
Horkelia congesta +
Conservation concern  +, Endemic  +
Horkelia congesta var. congesta +
Conservation concern  +, Endemic  +
Horkelia congesta var. nemorosa +
Conservation concern  +, Endemic  +
Horkelia cuneata +
Endemic  +
Horkelia cuneata var. cuneata +
Endemic  +
Horkelia cuneata var. puberula +
Conservation concern  +, Endemic  +
Horkelia cuneata var. sericea +
Conservation concern  +, Endemic  +
Horkelia daucifolia +
Endemic  +
Horkelia daucifolia var. caruifolia +
Endemic  +
Horkelia daucifolia var. daucifolia +
Endemic  +
Horkelia daucifolia var. indicta +
Conservation concern  +, Endemic  +
Horkelia fusca +
Endemic  +, Illustrated  +
Horkelia fusca var. brownii +
Endemic  +
Horkelia fusca var. capitata +
Endemic  +
Horkelia fusca var. filicoides +
Endemic  +
Horkelia fusca var. fusca +
Endemic  +
Horkelia fusca var. parviflora +
Endemic  +, Illustrated  +
Horkelia fusca var. pseudocapitata +
Endemic  +
Horkelia fusca var. tenella +
Endemic  +
Horkelia hendersonii +
Conservation concern  +, Endemic  +
Horkelia hispidula +
Conservation concern  +, Endemic  +
Horkelia howellii +
Conservation concern  +, Endemic  +, Illustrated  +
Horkelia marinensis +
Conservation concern  +, Endemic  +
Horkelia parryi +
Conservation concern  +, Endemic  +
Horkelia rydbergii +
Endemic  +
Horkelia sect. Capitatae +
Endemic  +
Horkelia sect. Hispidulae +
Conservation concern  +, Endemic  +
Horkelia sect. Parryae +
Conservation concern  +, Endemic  +
Horkelia sect. Tridentatae +
Endemic  +
Horkelia sericata +
Conservation concern  +, Endemic  +
Horkelia tenuiloba +
Conservation concern  +, Endemic  +
Horkelia tridentata +
Endemic  +
Horkelia tridentata var. flavescens +
Endemic  +
Horkelia tridentata var. tridentata +
Endemic  +
Horkelia truncata +
Conservation concern  +
Horkelia tularensis +
Conservation concern  +, Endemic  +
Horkelia wilderae +
Conservation concern  +, Endemic  +
Horkelia yadonii +
Conservation concern  +, Endemic  +
Horkeliella +
Endemic  +
Horkeliella congdonis +
Endemic  +
Horkeliella purpurascens +
Endemic  +, Illustrated  +
Horsfordia alata +
Illustrated  +
Horsfordia newberryi +
Illustrated  +
Hosackia alamosana +
Conservation concern  +
Hosackia crassifolia var. otayensis +
Endemic  +, Conservation concern  +
Hosackia gracilis +
Endemic  +
Hosackia incana +
Endemic  +
Hosackia oblongifolia var. cuprea +
Endemic  +, Conservation concern  +
Hosackia pinnata +
Illustrated  +, Endemic  +
Hosackia rosea +
Endemic  +
Hosackia stipularis +
Endemic  +
Hosackia stipularis var. ottleyi +
Endemic  +
Hosackia stipularis var. stipularis +
Endemic  +
Hosackia yollabolliensis +
Endemic  +
Hosta lancifolia +
Introduced  +
Hosta plantaginea +
W1  +, Introduced  +, Illustrated  +
Hosta ventricosa +
Introduced  +
Hottonia inflata +
Illustrated  +, Endemic  +
Hovenia +
Introduced  +
Hovenia dulcis +
Introduced  +, Illustrated  +
Howelliella +
Endemic  +
Howelliella ovata +
Endemic  +, Illustrated  +
Hudsonia +
Endemic  +
Hudsonia ericoides +
Endemic  +
Hudsonia montana +
Conservation concern  +, Endemic  +
Hudsonia tomentosa +
Endemic  +, Illustrated  +
Hulsea algida +
Endemic  +
Hulsea brevifolia +
Endemic  +
Hulsea californica +
Endemic  +, Conservation concern  +
Hulsea heterochroma +
Illustrated  +, Endemic  +
Hulsea nana +
Endemic  +
Hulsea vestita +
Illustrated  +, Endemic  +
Hulsea vestita subsp. callicarpha +
Endemic  +
Hulsea vestita subsp. gabrielensis +
Endemic  +
Hulsea vestita subsp. inyoensis +
Endemic  +, Conservation concern  +
Hulsea vestita subsp. parryi +
Endemic  +
Hulsea vestita subsp. pygmaea +
Illustrated  +, Endemic  +, Conservation concern  +
Hulsea vestita subsp. vestita +
Endemic  +
Hulteniella integrifolia +
Illustrated  +
Humulus japonicus +
Introduced  +, W1  +
Humulus lupulus +
Endemic  +, Illustrated  +
Humulus lupulus var. lupuloides +
Endemic  +
Humulus lupulus var. lupulus +
Introduced  +, Illustrated  +
Humulus lupulus var. neomexicanus +
Endemic  +, Illustrated  +
Humulus lupulus var. pubescens +
Endemic  +
Hunzikeria texana +
Illustrated  +
Huperzia selago +
Illustrated  +
Hura +
Introduced  +
Hura crepitans +
Introduced  +, Illustrated  +
Hyacinthoides hispanica +
Introduced  +
Hyacinthoides non-scripta +
Introduced  +, Illustrated  +
Hybanthus concolor +
Endemic  +
Hybanthus linearifolius +
Introduced  +
Hybanthus parviflorus +
Introduced  +
Hybanthus verticillatus +
Illustrated  +
Hydrangea arborescens +
Endemic  +
Hydrangea cinerea +
Endemic  +
Hydrangea paniculata +
Introduced  +
Hydrangea quercifolia +
Endemic  +, Illustrated  +
Hydrangea radiata +
Endemic  +
Hydrastis canadensis +
Endemic  +, Illustrated  +
Hydrilla verticillata +
Weedy  +, Introduced  +, Illustrated  +
Hydrocharis morsus-ranae +
Introduced  +, Illustrated  +
Hydrocleys nymphoides +
Introduced  +, Illustrated  +
Hydrolea corymbosa +
Endemic  +
Hydrolea ovata +
Endemic  +
Hydrolea quadrivalvis +
Illustrated  +, Endemic  +
Hydrolea uniflora +
Weedy  +, Endemic  +
Hygroamblystegium varium +
Illustrated  +
Hygroamblystegium varium subsp. noterophilum +
Endemic  +
Hygroamblystegium varium subsp. varium +
Illustrated  +
Hygroamblystegium varium var. humile +
Illustrated  +
Hygroamblystegium varium var. varium +
Illustrated  +
Hygrohypnum alpinum +
Illustrated  +
Hygrohypnum bestii +
Illustrated  +
Hygrohypnum closteri +
Endemic  +
Hygrohypnum duriusculum +
Illustrated  +
Hygrohypnum molle +
Illustrated  +
Hygrohypnum ochraceum +
Illustrated  +
Hygrohypnum polare +
Illustrated  +
Hygrohypnum smithii +
Illustrated  +
Hygrohypnum styriacum +
Illustrated  +
Hylocereus undatus +
Introduced  +, Illustrated  +
Hylocomiastrum pyrenaicum +
Illustrated  +
Hylocomiastrum umbratum +
Illustrated  +
Hylocomium splendens +
Illustrated  +
Hylodesmum nudiflorum +
Endemic  +
Hylodesmum pauciflorum +
Illustrated  +, Endemic  +
Hymenocallis choctawensis +
Endemic  +
Hymenocallis coronaria +
Illustrated  +, Endemic  +
Hymenocallis crassifolia +
Endemic  +
Hymenocallis duvalensis +
Endemic  +
Hymenocallis godfreyi +
Endemic  +, Conservation concern  +
Hymenocallis henryae +
Endemic  +, Conservation concern  +
Hymenocallis henryae var. glaucifolia +
Endemic  +, Conservation concern  +
Hymenocallis henryae var. henryae +
Endemic  +, Conservation concern  +
Hymenocallis latifolia +
Endemic  +
Hymenocallis liriosme +
Endemic  +
Hymenocallis occidentalis +
Illustrated  +, Endemic  +
Hymenocallis occidentalis var. eulae +
Endemic  +
Hymenocallis occidentalis var. occidentalis +
Illustrated  +, Endemic  +
Hymenocallis palmeri +
Endemic  +
Hymenocallis puntagordensis +
Endemic  +, Conservation concern  +
Hymenocallis rotata +
Illustrated  +, Endemic  +, Conservation concern  +
Hymenocallis tridentata +
Endemic  +
Hymenopappus artemisiifolius +
Endemic  +
Hymenopappus artemisiifolius var. artemisiifolius +
Endemic  +
Hymenopappus artemisiifolius var. riograndensis +
Endemic  +
Hymenopappus biennis +
Endemic  +
Hymenopappus carrizoanus +
Endemic  +, Conservation concern  +
Hymenopappus filifolius +
Illustrated  +
Hymenopappus filifolius var. cinereus +
Illustrated  +, Endemic  +
Hymenopappus filifolius var. eriopodus +
Endemic  +
Hymenopappus filifolius var. filifolius +
Endemic  +
Hymenopappus filifolius var. idahoensis +
Endemic  +
Hymenopappus filifolius var. lugens +
Illustrated  +
Hymenopappus filifolius var. luteus +
Endemic  +
Hymenopappus filifolius var. megacephalus +
Endemic  +
Hymenopappus filifolius var. nanus +
Endemic  +
Hymenopappus filifolius var. nudipes +
Endemic  +
Hymenopappus filifolius var. parvulus +
Endemic  +
Hymenopappus filifolius var. pauciflorus +
Endemic  +
Hymenopappus filifolius var. polycephalus +
Endemic  +
Hymenopappus filifolius var. tomentosus +
Endemic  +
Hymenopappus flavescens var. flavescens +
Endemic  +
Hymenopappus newberryi +
Illustrated  +, Endemic  +
Hymenopappus radiatus +
Endemic  +
Hymenopappus tenuifolius +
Endemic  +
Hymenophyllum tayloriae +
Illustrated  +, Endemic  +
Hymenophyllum tunbrigense +
Illustrated  +
Hymenothrix loomisii +
Endemic  +
Hymenothrix wrightii +
Illustrated  +
Hymenoxys ambigens +
Endemic  +, Conservation concern  +
Hymenoxys ambigens var. ambigens +
Endemic  +, Conservation concern  +
Hymenoxys ambigens var. floribunda +
Endemic  +, Conservation concern  +
Hymenoxys ambigens var. neomexicana +
Endemic  +, Conservation concern  +
Hymenoxys bigelovii +
Endemic  +
Hymenoxys brandegeei +
Endemic  +
Hymenoxys cooperi +
Endemic  +
Hymenoxys grandiflora +
Illustrated  +, Endemic  +
Hymenoxys helenioides +
Endemic  +
Hymenoxys hoopesii +
Illustrated  +, Endemic  +
Hymenoxys jamesii +
Endemic  +, Conservation concern  +
Hymenoxys lemmonii +
Endemic  +
Hymenoxys odorata +
Illustrated  +
Hymenoxys quinquesquamata +
Endemic  +
Hymenoxys richardsonii +
Endemic  +
Hymenoxys richardsonii var. floribunda +
Endemic  +
Hymenoxys richardsonii var. richardsonii +
Endemic  +
Hymenoxys rusbyi +
Endemic  +
Hymenoxys subintegra +
Endemic  +
Hymenoxys texana +
Endemic  +, Conservation concern  +
Hymenoxys vaseyi +
Endemic  +, Conservation concern  +
Hyoscyamus +
Introduced  +
Hyoscyamus albus +
Introduced  +
Hyoscyamus niger +
Weedy  +, Introduced  +, Illustrated  +
Hyparrhenia hirta +
Introduced  +
Hyparrhenia rufa +
Introduced  +
Hypericum adpressum +
Endemic  +
Hypericum apocynifolium +
Endemic  +
Hypericum ascyron +
Illustrated  +
Hypericum ascyron subsp. pyramidatum +
Illustrated  +
Hypericum boreale +
Endemic  +
Hypericum brachyphyllum +
Endemic  +
Hypericum buckleyi +
Endemic  +
Hypericum canadense +
Endemic  +, Weedy  +, Illustrated  +
Hypericum canariense +
Introduced  +, Weedy  +
Hypericum chapmanii +
Endemic  +
Hypericum cistifolium +
Endemic  +, Illustrated  +
Hypericum concinnum +
Endemic  +
Hypericum crux-andreae +
Endemic  +, Illustrated  +
Hypericum cumulicola +
Conservation concern  +, Endemic  +
Hypericum densiflorum +
Endemic  +
Hypericum denticulatum +
Endemic  +, Illustrated  +
Hypericum dolabriforme +
Endemic  +
Hypericum drummondii +
Endemic  +, Weedy  +
Hypericum edisonianum +
Conservation concern  +, Endemic  +
Hypericum ellipticum +
Endemic  +
Hypericum fasciculatum +
Endemic  +, Illustrated  +
Hypericum frondosum +
Endemic  +, Weedy  +, Illustrated  +
Hypericum galioides +
Endemic  +
Hypericum gentianoides +
Endemic  +, Weedy  +
Hypericum graveolens +
Endemic  +
Hypericum harperi +
Endemic  +
Hypericum hypericoides subsp. multicaule +
Endemic  +
Hypericum kalmianum +
Endemic  +
Hypericum lissophloeus +
Conservation concern  +, Endemic  +
Hypericum lloydii +
Endemic  +
Hypericum lobocarpum +
Endemic  +
Hypericum maculatum +
Introduced  +
Hypericum maculatum subsp. obtusiusculum +
Introduced  +
Hypericum majus +
Endemic  +
Hypericum microsepalum +
Endemic  +
Hypericum mutilum +
Weedy  +, Endemic  +
Hypericum mutilum subsp. latisepalum +
Endemic  +
Hypericum mutilum subsp. mutilum +
Weedy  +, Endemic  +
Hypericum myrtifolium +
Endemic  +
Hypericum nitidum subsp. exile +
Conservation concern  +
Hypericum nudiflorum +
Endemic  +
Hypericum perforatum +
Introduced  +, Weedy  +
Hypericum perforatum subsp. perforatum +
Introduced  +, Weedy  +
Hypericum prolificum +
Endemic  +, Weedy  +
Hypericum pseudomaculatum +
Endemic  +, Illustrated  +
Hypericum punctatum +
Endemic  +, Weedy  +
Hypericum sect. Webbia +
Introduced  +
Hypericum setosum +
Endemic  +
Hypericum sphaerocarpum +
Endemic  +
Hypericum suffruticosum +
Endemic  +
Hypericum tenuifolium +
Endemic  +
Hypericum virgatum +
Endemic  +, Illustrated  +
Hypericum ×mitchellianum +
Endemic  +
Hypnum andoi +
Illustrated  +
Hypnum callichroum +
Illustrated  +
Hypnum circinale +
Endemic  +
Hypnum cupressiforme +
Illustrated  +
Hypnum cupressiforme var. cupressiforme +
Illustrated  +
Hypnum cupressiforme var. filiforme +
Illustrated  +
Hypnum cupressiforme var. julaceum +
Illustrated  +
Hypnum cupressiforme var. subjulaceum +
Illustrated  +
Hypnum curvifolium +
Endemic  +
Hypnum dieckei +
Illustrated  +
Hypnum fujiyamae +
Illustrated  +
Hypnum jutlandicum +
Illustrated  +
Hypnum lindbergii +
Illustrated  +
Hypnum plicatulum +
Illustrated  +
Hypnum revolutum +
Illustrated  +
Hypnum revolutum var. ravaudii +
Illustrated  +
Hypnum revolutum var. revolutum +
Illustrated  +
Hypochaeris chillensis +
Introduced  +
Hypochaeris glabra +
Introduced  +
Hypochaeris microcephala +
Introduced  +
Hypochaeris microcephala var. albiflora +
Introduced  +
Hypochaeris radicata +
Introduced  +, Illustrated  +
Hypolepis repens +
Illustrated  +
Hypopterygium flavolimbatum +
Illustrated  +
Hypoxis curtissii +
Illustrated  +, Endemic  +
Hypoxis hirsuta +
Illustrated  +, Endemic  +
Hypoxis juncea +
Endemic  +
Hypoxis rigida +
Endemic  +
Hypoxis sessilis +
Endemic  +
I
Iberis amara +
Introduced  +
Iberis umbellata +
Introduced  +
Ibervillea lindheimeri +
Illustrated  +
Idahoa scapigera +
Illustrated  +, Endemic  +
Iliamna +
Endemic  +
Iliamna bakeri +
Endemic  +
Iliamna corei +
Conservation concern  +, Endemic  +
Iliamna crandallii +
Endemic  +
Iliamna grandiflora +
Endemic  +
Iliamna latibracteata +
Endemic  +
Iliamna longisepala +
Endemic  +
Iliamna remota +
Endemic  +
Iliamna rivularis +
Endemic  +, Illustrated  +
Illicium floridanum +
Illustrated  +
Illicium parviflorum +
Conservation concern  +, Endemic  +
Imbribryum miniatum +
Illustrated  +
Imperata brasiliensis +
Introduced  +
Indigofera caroliniana +
Endemic  +
Indigofera colutea +
Introduced  +
Indigofera decora +
Introduced  +
Indigofera hirsuta +
Weedy  +, Introduced  +
Indigofera kirilowii +
Introduced  +
Indigofera miniata +
Illustrated  +
Indigofera oxycarpa +
Conservation concern  +
Indigofera pilosa +
Weedy  +, Introduced  +
Indigofera spicata +
Weedy  +, Introduced  +
Indigofera suffruticosa +
Introduced  +, Illustrated  +
Indigofera texana +
Endemic  +
Indigofera tinctoria +
Introduced  +
Inula britannica +
Introduced  +
Inula helenium +
Introduced  +, Illustrated  +
Iodanthus pinnatifidus +
Illustrated  +, Endemic  +
Ionactis alpina +
Illustrated  +, Endemic  +
Ionactis caelestis +
Endemic  +, Conservation concern  +
Ionactis elegans +
Endemic  +, Conservation concern  +
Ionactis linariifolia +
Endemic  +
Ionactis stenomeres +
Endemic  +
Ionopsis utricularioides +
Illustrated  +
Ipomoea alba +
Weedy  +, Introduced  +
Ipomoea amnicola +
Introduced  +
Ipomoea aquatica +
Weedy  +, Introduced  +
Ipomoea asarifolia +
Introduced  +
Ipomoea batatas +
Introduced  +
Ipomoea cairica +
Weedy  +, Introduced  +
Ipomoea carnea +
Weedy  +, Introduced  +
Ipomoea carnea subsp. fistulosa +
Weedy  +, Introduced  +
Ipomoea coccinea +
Weedy  +, Endemic  +
Ipomoea cordatotriloba +
Weedy  +, Illustrated  +
Ipomoea cordatotriloba var. cordatotriloba +
Weedy  +
Ipomoea cordatotriloba var. torreyana +
Weedy  +, Illustrated  +
Ipomoea hederacea +
Weedy  +, Illustrated  +
Ipomoea hederifolia +
Weedy  +
Ipomoea indica +
Weedy  +
Ipomoea lacunosa +
Weedy  +, Endemic  +
Ipomoea leptophylla +
Illustrated  +, Endemic  +
Ipomoea macrorhiza +
Endemic  +
Ipomoea microdactyla +
Conservation concern  +
Ipomoea muricata +
Weedy  +, Introduced  +
Ipomoea nil +
Weedy  +, Introduced  +
Ipomoea pandurata +
Weedy  +, Illustrated  +, Endemic  +
Ipomoea pes-caprae +
Weedy  +
Ipomoea pes-caprae subsp. brasiliensis +
Weedy  +
Ipomoea purpurea +
Weedy  +, Introduced  +, Illustrated  +
Ipomoea quamoclit +
Weedy  +, Illustrated  +
Ipomoea sagittata +
Illustrated  +
Ipomoea setosa +
Introduced  +
Ipomoea shumardiana +
Endemic  +, Conservation concern  +
Ipomoea sloteri +
Endemic  +
Ipomoea tenuiloba var. lemmonii +
Endemic  +
Ipomoea tenuissima +
Endemic  +
Ipomoea tricolor +
Weedy  +, Introduced  +
Ipomoea triloba +
Weedy  +, Introduced  +
Ipomoea wrightii +
Weedy  +, Introduced  +
Iresine leptoclada +
Illustrated  +
Iresine rhizomatosa +
Illustrated  +, Endemic  +
Iris bracteata +
Endemic  +
Iris brevicaulis +
Illustrated  +, Endemic  +
Iris chrysophylla +
Endemic  +
Iris cristata +
Illustrated  +, Endemic  +
Iris douglasiana +
Illustrated  +, Endemic  +
Iris fernaldii +
Endemic  +
Iris fulva +
Illustrated  +, Endemic  +
Iris germanica +
Introduced  +
Iris giganticaerulea +
Illustrated  +, Endemic  +
Iris hartwegii +
Endemic  +
Iris hexagona +
Illustrated  +, Endemic  +
Iris hookeri +
Illustrated  +, Endemic  +
Iris innominata +
Endemic  +
Iris lacustris +
Endemic  +
Iris longipetala +
Endemic  +
Iris macrosiphon +
Illustrated  +, Endemic  +
Iris missouriensis +
W2  +, Illustrated  +
Iris munzii +
Endemic  +
Iris prismatica +
Endemic  +
Iris pseudacorus +
W2  +, W1  +, Introduced  +, …
Iris pumila +
Introduced  +
Iris purdyi +
Endemic  +
Iris savannarum +
Illustrated  +, Endemic  +
Iris sibirica +
Introduced  +
Iris tenax +
Endemic  +
Iris tenuis +
Endemic  +, Conservation concern  +
Iris tenuissima +
Endemic  +
Iris tridentata +
Illustrated  +, Endemic  +
Iris verna +
Endemic  +
Iris verna var. smalliana +
Endemic  +
Iris verna var. verna +
Endemic  +
Iris versicolor +
W2  +, W1  +, Illustrated  +, …
Iris virginica +
Illustrated  +, Endemic  +
Isatis tinctoria +
Weedy  +, Introduced  +, Illustrated  +
Ismelia carinata +
Introduced  +, Illustrated  +
Isocarpha oppositifolia +
Illustrated  +
Isocarpha oppositifolia var. achyranthes +
Illustrated  +
Isocoma acradenia +
Illustrated  +
Isocoma acradenia var. acradenia +
Illustrated  +
Isocoma acradenia var. bracteosa +
Endemic  +
Isocoma acradenia var. eremophila +
Illustrated  +
Isocoma arguta +
Endemic  +, Conservation concern  +
Isocoma humilis +
Endemic  +, Conservation concern  +
Isocoma menziesii var. decumbens +
Conservation concern  +
Isocoma menziesii var. vernonioides +
Conservation concern  +
Isocoma pluriflora +
Illustrated  +
Isocoma rusbyi +
Endemic  +
Isocoma tenuisecta +
Illustrated  +
Isolepis carinata +
Illustrated  +, Endemic  +
Isolepis cernua +
Illustrated  +
Isolepis pseudosetacea +
Illustrated  +
Isolepis setacea +
Introduced  +, Illustrated  +
Isopterygiopsis muelleriana +
Illustrated  +
Isopterygiopsis pulchella +
Illustrated  +
Isopterygium tenerum +
Illustrated  +
Isothecium cardotii +
Endemic  +, Illustrated  +
Isothecium cristatum +
Endemic  +
Isothecium myosuroides +
Illustrated  +
Isothecium stoloniferum +
Endemic  +
Isotria medeoloides +
Endemic  +, Conservation concern  +
Isotria verticillata +
Illustrated  +, Endemic  +
Itea virginica +
Illustrated  +, Endemic  +
Iva angustifolia +
Endemic  +
Iva axillaris +
Illustrated  +, Endemic  +
Iva frutescens +
Illustrated  +, Endemic  +
Iva microcephala +
Endemic  +
Ivesia aperta +
Conservation concern  +, Endemic  +
Ivesia aperta var. aperta +
Conservation concern  +, Endemic  +
Ivesia aperta var. canina +
Conservation concern  +, Endemic  +
Ivesia argyrocoma +
Conservation concern  +
Ivesia argyrocoma var. argyrocoma +
Conservation concern  +
Ivesia arizonica +
Conservation concern  +, Endemic  +, Illustrated  +
Ivesia arizonica var. arizonica +
Conservation concern  +, Endemic  +, Illustrated  +
Ivesia arizonica var. saxosa +
Conservation concern  +, Endemic  +
Ivesia baileyi +
Endemic  +
Ivesia baileyi var. baileyi +
Endemic  +, Conservation concern  +
Ivesia baileyi var. beneolens +
Endemic  +
Ivesia callida +
Conservation concern  +, Endemic  +
Ivesia campestris +
Endemic  +
Ivesia cryptocaulis +
Conservation concern  +, Endemic  +
Ivesia gordonii +
Endemic  +, Illustrated  +
Ivesia gordonii var. alpicola +
Endemic  +
Ivesia gordonii var. gordonii +
Endemic  +, Illustrated  +
Ivesia gordonii var. ursinorum +
Endemic  +
Ivesia gordonii var. wasatchensis +
Endemic  +
Ivesia jaegeri +
Conservation concern  +, Endemic  +
Ivesia kingii +
Conservation concern  +, Endemic  +, Illustrated  +
Ivesia kingii var. eremica +
Conservation concern  +, Endemic  +
Ivesia kingii var. kingii +
Conservation concern  +, Endemic  +, Illustrated  +
Ivesia longibracteata +
Conservation concern  +, Endemic  +
Ivesia lycopodioides +
Endemic  +
Ivesia lycopodioides var. lycopodioides +
Endemic  +
Ivesia lycopodioides var. megalopetala +
Endemic  +
Ivesia lycopodioides var. scandularis +
Endemic  +
Ivesia muirii +
Endemic  +
Ivesia multifoliolata +
Conservation concern  +, Endemic  +
Ivesia paniculata +
Conservation concern  +, Endemic  +
Ivesia patellifera +
Conservation concern  +, Endemic  +
Ivesia pickeringii +
Conservation concern  +, Endemic  +
Ivesia pityocharis +
Conservation concern  +, Endemic  +
Ivesia pygmaea +
Endemic  +
Ivesia rhypara +
Conservation concern  +, Endemic  +
Ivesia rhypara var. rhypara +
Conservation concern  +, Endemic  +
Ivesia rhypara var. shellyi +
Conservation concern  +, Endemic  +
Ivesia sabulosa +
Conservation concern  +, Endemic  +, Illustrated  +
Ivesia santolinoides +
Endemic  +, Illustrated  +
Ivesia sect. Comarella +
Conservation concern  +, Endemic  +
Ivesia sect. Stellariopsis +
Endemic  +
Ivesia sericoleuca +
Conservation concern  +, Endemic  +
Ivesia setosa +
Endemic  +
Ivesia shockleyi +
Conservation concern  +, Endemic  +
Ivesia shockleyi var. ostleri +
Conservation concern  +, Endemic  +
Ivesia shockleyi var. shockleyi +
Conservation concern  +, Endemic  +
Ivesia tweedyi +
Conservation concern  +, Endemic  +
Ivesia unguiculata +
Conservation concern  +, Endemic  +
Ivesia utahensis +
Conservation concern  +, Endemic  +
Ivesia webberi +
Conservation concern  +, Endemic  +
Iwatsukiella leucotricha +
Illustrated  +
Ixeris stolonifera +
Introduced  +, Illustrated  +
Ixophorus unisetus +
Introduced  +
J
Jaborosa +
Introduced  +
Jaborosa integrifolia +
Introduced  +, Illustrated  +
Jacquemontia curtissii +
Illustrated  +, Endemic  +, Conservation concern  +
Jacquemontia reclinata +
Endemic  +, Conservation concern  +
Jacquemontia tamnifolia +
Weedy  +
Jacquinia keyensis +
Illustrated  +
Jaegerina scariosa +
Illustrated  +
Jaltomata procumbens +
Illustrated  +
Jamesia americana +
Illustrated  +
Jamesia americana var. americana +
Illustrated  +
Jamesia americana var. macrocalyx +
Endemic  +, Conservation concern  +, Illustrated  +
Jamesia americana var. rosea +
Endemic  +
Jamesia americana var. zionis +
Endemic  +, Conservation concern  +
Jamesia tetrapetala +
Endemic  +, Conservation concern  +
Jamesianthus alabamensis +
Illustrated  +, Endemic  +
Jatropha cuneata +
Illustrated  +
Jatropha curcas +
Introduced  +
Jatropha dioica +
Illustrated  +
Jatropha dioica var. dioica +
Illustrated  +
Jatropha dioica var. graminea +
Illustrated  +
Jatropha gossypiifolia +
Weedy  +, Introduced  +
Jatropha integerrima +
Introduced  +
Jatropha macrorhiza +
Illustrated  +
Jatropha multifida +
Introduced  +
Jaumea carnosa +
Illustrated  +
Jefea brevifolia +
Illustrated  +
Jeffersonia diphylla +
Endemic  +, Illustrated  +
Jensia rammii +
Endemic  +
Jensia yosemitana +
Illustrated  +, Endemic  +, Conservation concern  +
Jepsonia heterandra +
Endemic  +, Conservation concern  +
Jepsonia malvifolia +
Conservation concern  +
Jepsonia parryi +
Illustrated  +
Johanneshowellia puberula +
Illustrated  +, Endemic  +
Juglans californica +
Endemic  +, Illustrated  +
Juglans cinerea +
Conservation concern  +, Endemic  +, Illustrated  +
Juglans hindsii +
Conservation concern  +, Endemic  +, Illustrated  +
Juglans major +
Illustrated  +
Juglans major var. major +
Illustrated  +
Juglans microcarpa +
Illustrated  +
Juglans nigra +
Endemic  +, Illustrated  +
Juncus acuminatus +
Illustrated  +
Juncus acutus +
Illustrated  +
Juncus acutus subsp. leopoldii +
Illustrated  +
Juncus anthelatus +
Endemic  +
Juncus arcticus +
Illustrated  +
Juncus arcticus var. alaskanus +
Illustrated  +
Juncus arcticus var. balticus +
Illustrated  +
Juncus arcticus var. mexicanus +
Illustrated  +
Juncus articulatus +
Illustrated  +
Juncus biglumis +
Illustrated  +
Juncus brachycarpus +
Endemic  +
Juncus brachycephalus +
Endemic  +
Juncus brachyphyllus +
Endemic  +
Juncus bryoides +
Illustrated  +
Juncus bufonius +
Weedy  +, Illustrated  +
Juncus bulbosus +
Introduced  +
Juncus caesariensis +
Illustrated  +, Endemic  +
Juncus canadensis +
Illustrated  +, Endemic  +
Juncus capillaris +
Endemic  +
Juncus capitatus +
Introduced  +, Illustrated  +
Juncus castaneus +
Illustrated  +
Juncus chlorocephalus +
Endemic  +
Juncus compressus +
Introduced  +
Juncus confusus +
Illustrated  +, Endemic  +
Juncus coriaceus +
Endemic  +
Juncus covillei var. obtusatus +
Endemic  +
Juncus diffusissimus +
Endemic  +
Juncus drummondii +
Illustrated  +, Endemic  +
Juncus dubius +
Endemic  +
Juncus dudleyi +
Illustrated  +
Juncus effusus +
Weedy  +, Illustrated  +, Endemic  +
Juncus elliottii +
Endemic  +
Juncus ensifolius +
Illustrated  +
Juncus ensifolius var. ensifolius +
Illustrated  +
Juncus ensifolius var. montanus +
Illustrated  +
Juncus filiformis +
Illustrated  +
Juncus filipendulus +
Endemic  +
Juncus georgianus +
Endemic  +
Juncus gerardii +
Illustrated  +
Juncus greenei +
Illustrated  +, Endemic  +
Juncus gymnocarpus +
Endemic  +
Juncus hallii +
Endemic  +
Juncus hemiendytus +
Illustrated  +, Endemic  +
Juncus hemiendytus var. abjectus +
Endemic  +
Juncus hemiendytus var. hemiendytus +
Illustrated  +, Endemic  +
Juncus howellii +
Endemic  +
Juncus inflexus +
Weedy  +, Introduced  +
Juncus interior +
Illustrated  +, Endemic  +
Juncus kelloggii +
Endemic  +
Juncus leiospermus +
Illustrated  +, Endemic  +, Conservation concern  +
Juncus lesueurii +
Endemic  +
Juncus longistylis +
Illustrated  +, Endemic  +
Juncus luciensis +
Endemic  +
Juncus macrandrus +
Endemic  +
Juncus macrophyllus +
Illustrated  +, Endemic  +, Conservation concern  +
Juncus marginatus +
Illustrated  +
Juncus megacephalus +
Endemic  +
Juncus mertensianus +
Illustrated  +, Endemic  +
Juncus militaris +
Illustrated  +, Endemic  +
Juncus nevadensis +
Illustrated  +, Endemic  +
Juncus nodatus +
Endemic  +
Juncus occidentalis +
Endemic  +
Juncus orthophyllus +
Endemic  +
Juncus oxymeris +
Endemic  +
Juncus parryi +
Endemic  +
Juncus pelocarpus +
Illustrated  +, Endemic  +
Juncus pervetus +
Endemic  +
Juncus phaeocephalus +
Weedy  +
Juncus polycephalus +
Endemic  +
Juncus regelii +
Endemic  +
Juncus roemerianus +
Illustrated  +, Endemic  +
Juncus scirpoides +
Illustrated  +, Endemic  +
Juncus secundus +
Endemic  +
Juncus squarrosus +
Introduced  +
Juncus subcaudatus +
Endemic  +
Juncus subtilis +
Endemic  +
Juncus supiniformis +
Endemic  +
Juncus tenuis +
Weedy  +, Illustrated  +
Juncus texanus +
Endemic  +
Juncus textilis +
Endemic  +
Juncus tiehmii +
Illustrated  +, Conservation concern  +
Juncus torreyi +
Illustrated  +
Juncus trifidus +
Illustrated  +
Juncus triformis +
Illustrated  +, Endemic  +, Conservation concern  +
Juncus triglumis var. albescens +
Illustrated  +
Juncus trigonocarpus +
Illustrated  +, Endemic  +
Juncus tweedyi +
Illustrated  +, Endemic  +
Juncus uncialis +
Endemic  +
Juncus validus +
Endemic  +
Juncus validus var. fascinatus +
Endemic  +
Juncus validus var. validus +
Endemic  +
Juncus vaseyi +
Illustrated  +, Endemic  +
Juniperus ashei +
Illustrated  +
Juniperus communis +
Illustrated  +
Juniperus communis var. depressa +
Illustrated  +, Endemic  +
Juniperus communis var. megistocarpa +
Endemic  +
Juniperus communis var. montana +
Endemic  +
Juniperus horizontalis +
Endemic  +
Juniperus monosperma +
Illustrated  +, Endemic  +
Juniperus occidentalis +
Endemic  +
Juniperus occidentalis var. australis +
Endemic  +
Juniperus occidentalis var. occidentalis +
Endemic  +
Juniperus osteosperma +
Endemic  +
Juniperus virginiana +
Illustrated  +, Endemic  +
Juniperus virginiana var. silicicola +
Illustrated  +, Endemic  +
Juniperus virginiana var. virginiana +
Illustrated  +, Endemic  +
K
Kallstroemia grandiflora +
Weedy  +
Kallstroemia parviflora +
Illustrated  +
Kallstroemia perennans +
Conservation concern  +, Endemic  +
Kalmia angustifolia +
Weedy  +, Endemic  +
Kalmia angustifolia var. angustifolia +
Weedy  +, Endemic  +
Kalmia angustifolia var. carolina +
Endemic  +
Kalmia cuneata +
Endemic  +
Kalmia hirsuta +
Endemic  +
Kalmia latifolia +
Endemic  +
Kalmia microphylla +
Endemic  +
Kalmia microphylla var. microphylla +
Endemic  +
Kalmia microphylla var. occidentalis +
Endemic  +
Kalmia polifolia +
Endemic  +
Kalmiopsis leachiana +
Illustrated  +, Endemic  +, Conservation concern  +
Karwinskia humboldtiana +
Illustrated  +
Keckiella antirrhinoides +
Illustrated  +
Keckiella antirrhinoides var. antirrhinoides +
Illustrated  +
Keckiella antirrhinoides var. microphylla +
Illustrated  +
Keckiella breviflora +
Endemic  +
Keckiella breviflora var. breviflora +
Endemic  +
Keckiella breviflora var. glabrisepala +
Endemic  +
Keckiella cordifolia +
Illustrated  +
Keckiella corymbosa +
Endemic  +
Keckiella lemmonii +
Endemic  +
Keckiella rothrockii +
Endemic  +
Keckiella rothrockii var. jacintensis +
Endemic  +
Keckiella rothrockii var. rothrockii +
Endemic  +
Keckiella ternata var. septentrionalis +
Endemic  +
Kelseya +
Endemic  +
Kelseya uniflora +
Endemic  +, Illustrated  +
Kerria +
Introduced  +
Kerria japonica +
Introduced  +, Illustrated  +
Kickxia +
Introduced  +
Kickxia elatine +
Weedy  +, Introduced  +, Illustrated  +
Kickxia spuria +
Weedy  +, Introduced  +
Kindbergia oregana +
Endemic  +, Illustrated  +
Kindbergia praelonga +
Illustrated  +
Koanophyllon villosum +
Illustrated  +
Kobresia myosuroides +
Illustrated  +
Kobresia sibirica +
Illustrated  +
Kobresia simpliciuscula +
Illustrated  +
Kochia americana +
Weedy  +, Illustrated  +
Kochia californica +
Endemic  +
Kochia scoparia +
Weedy  +, Introduced  +, Illustrated  +
Kochia scoparia subsp. scoparia +
Weedy  +, Introduced  +, Illustrated  +
Koeberlinia spinosa +
Illustrated  +
Koeberlinia spinosa var. spinosa +
Illustrated  +
Koeberlinia spinosa var. tenuispina +
Illustrated  +
Koeberlinia spinosa var. wivaggii +
Illustrated  +
Koeleria pyramidata +
Introduced  +
Koenigia islandica +
Illustrated  +
Kopsiopsis hookeri +
Endemic  +
Kopsiopsis strobilacea +
Illustrated  +
Kosteletzkya depressa +
Illustrated  +
Krameria lanceolata +
Illustrated  +
Krapovickasia +
Introduced  +
Krapovickasia physaloides +
Introduced  +, Illustrated  +
Krascheninnikovia lanata +
Illustrated  +
Krigia biflora +
Endemic  +
Krigia cespitosa +
Illustrated  +
Krigia cespitosa var. cespitosa +
Illustrated  +
Krigia cespitosa var. gracilis +
Endemic  +
Krigia dandelion +
Endemic  +
Krigia montana +
Endemic  +
Krigia occidentalis +
Endemic  +
Krigia virginica +
Endemic  +
Krigia wrightii +
Illustrated  +, Endemic  +
Krugiodendron ferreum +
Illustrated  +
Kummerowia +
Introduced  +
Kummerowia stipulacea +
Weedy  +, Introduced  +, Illustrated  +
Kummerowia striata +
Weedy  +, Introduced  +
Kyhosia bolanderi +
Illustrated  +, Endemic  +
Kyllinga brevifolia +
W2  +, W1  +, Illustrated  +
Kyllinga gracillima +
Introduced  +, Illustrated  +
Kyllinga odorata +
W2  +, Illustrated  +
Kyllinga pumila +
Illustrated  +
Kyllinga squamulata +
Introduced  +, Illustrated  +
L
Lablab +
Introduced  +
Lablab purpureus +
Introduced  +, Illustrated  +
Laburnum +
Introduced  +
Laburnum anagyroides +
Introduced  +, Illustrated  +
Laburnum ×watereri +
Introduced  +
Lachnanthes caroliniana +
W2  +, W1  +, Illustrated  +
Lachnocaulon anceps +
Illustrated  +
Lachnocaulon beyrichianum +
Endemic  +, Conservation concern  +
Lachnocaulon digynum +
Endemic  +
Lachnocaulon engleri +
Illustrated  +, Endemic  +, Conservation concern  +
Lachnocaulon minus +
Endemic  +
Lackeya +
Endemic  +
Lackeya multiflora +
Illustrated  +, Endemic  +
Lactuca biennis +
Illustrated  +, Endemic  +
Lactuca canadensis +
Illustrated  +
Lactuca floridana +
Endemic  +
Lactuca hirsuta +
Endemic  +
Lactuca ludoviciana +
Endemic  +
Lactuca saligna +
Introduced  +
Lactuca sativa +
Introduced  +
Lactuca serriola +
Introduced  +, Illustrated  +
Lactuca virosa +
Introduced  +
Ladeania +
Endemic  +
Ladeania juncea +
Endemic  +
Ladeania lanceolata +
Illustrated  +, Endemic  +
Lagascea decipiens +
Illustrated  +
Lagascea decipiens var. decipiens +
Illustrated  +
Lagenaria +
Introduced  +
Lagenaria siceraria +
Introduced  +, Illustrated  +
Lagenaria siceraria subsp. siceraria +
Introduced  +, Illustrated  +
Lagophylla dichotoma +
Endemic  +
Lagophylla glandulosa +
Endemic  +
Lagophylla minor +
Endemic  +
Lagophylla ramosissima +
Illustrated  +, Endemic  +
Lagotis glauca +
Illustrated  +
Lagotis glauca subsp. glauca +
Illustrated  +
Lagotis glauca subsp. lanceolata +
Illustrated  +
Lagunaria +
Introduced  +
Lagunaria patersonia +
Introduced  +, Illustrated  +
Laportea aestuans +
Introduced  +
Laportea canadensis +
Illustrated  +
Lapsana communis +
Introduced  +, Illustrated  +
Lapsanastrum apogonoides +
Introduced  +, Illustrated  +
Larix laricina +
Endemic  +
Larix lyallii +
Endemic  +
Larix occidentalis +
Illustrated  +, Endemic  +
Larrea tridentata +
Weedy  +, Illustrated  +
Lasianthaea podocephala +
Illustrated  +
Lastarriaea coriacea +
Illustrated  +
Lasthenia burkei +
Endemic  +, Conservation concern  +
Lasthenia californica +
Illustrated  +, Endemic  +
Lasthenia californica subsp. bakeri +
Endemic  +, Conservation concern  +
Lasthenia californica subsp. californica +
Illustrated  +, Endemic  +
Lasthenia californica subsp. macrantha +
Illustrated  +, Endemic  +
Lasthenia chrysantha +
Endemic  +
Lasthenia conjugens +
Endemic  +, Conservation concern  +
Lasthenia debilis +
Endemic  +
Lasthenia ferrisiae +
Endemic  +
Lasthenia fremontii +
Endemic  +
Lasthenia glaberrima +
Illustrated  +, Endemic  +
Lasthenia glabrata +
Endemic  +
Lasthenia glabrata subsp. coulteri +
Endemic  +
Lasthenia glabrata subsp. glabrata +
Endemic  +
Lasthenia gracilis +
Illustrated  +
Lasthenia leptalea +
Endemic  +
Lasthenia maritima +
Endemic  +
Lasthenia microglossa +
Endemic  +
Lasthenia minor +
Endemic  +
Lasthenia ornduffii +
Endemic  +, Conservation concern  +
Lasthenia platycarpha +
Endemic  +
Lathyrus angulatus +
Weedy  +, Introduced  +, Illustrated  +
Lathyrus aphaca +
Introduced  +
Lathyrus biflorus +
Endemic  +, Conservation concern  +
Lathyrus brachycalyx +
Endemic  +
Lathyrus brachycalyx var. brachycalyx +
Endemic  +
Lathyrus brachycalyx var. zionis +
Endemic  +
Lathyrus brownii +
Endemic  +
Lathyrus cicera +
Weedy  +, Introduced  +
Lathyrus decaphyllus +
Illustrated  +
Lathyrus decaphyllus var. decaphyllus +
Illustrated  +
Lathyrus decaphyllus var. incanus +
Endemic  +
Lathyrus delnorticus +
Endemic  +
Lathyrus glandulosus +
Endemic  +
Lathyrus graminifolius +
Illustrated  +
Lathyrus grimesii +
Endemic  +, Conservation concern  +
Lathyrus hirsutus +
Weedy  +, Introduced  +
Lathyrus hitchcockianus +
Endemic  +, Conservation concern  +
Lathyrus holochlorus +
Endemic  +, Conservation concern  +
Lathyrus japonicus var. maritimus +
Endemic  +
Lathyrus japonicus var. pellitus +
Endemic  +
Lathyrus jepsonii +
Endemic  +
Lathyrus jepsonii var. californicus +
Endemic  +
Lathyrus jepsonii var. jepsonii +
Illustrated  +, Endemic  +, Conservation concern  +
Lathyrus laetivirens +
Endemic  +
Lathyrus lanszwertii +
Endemic  +
Lathyrus lanszwertii var. aridus +
Endemic  +
Lathyrus lanszwertii var. bijugatus +
Endemic  +
Lathyrus lanszwertii var. lanszwertii +
Endemic  +
Lathyrus lanszwertii var. leucanthus +
Endemic  +
Lathyrus lanszwertii var. pallescens +
Endemic  +
Lathyrus latifolius +
Weedy  +, Introduced  +
Lathyrus littoralis +
Endemic  +
Lathyrus nevadensis +
Endemic  +
Lathyrus nevadensis var. cusickii +
Endemic  +
Lathyrus nevadensis var. nevadensis +
Endemic  +
Lathyrus nevadensis var. parkeri +
Endemic  +
Lathyrus nissolia +
Introduced  +
Lathyrus ochroleucus +
Illustrated  +, Endemic  +
Lathyrus odoratus +
Weedy  +, Introduced  +
Lathyrus palustris +
Weedy  +, Endemic  +
Lathyrus pauciflorus +
Illustrated  +
Lathyrus pauciflorus var. pauciflorus +
Illustrated  +
Lathyrus pauciflorus var. utahensis +
Illustrated  +, Endemic  +
Lathyrus polyphyllus +
Endemic  +
Lathyrus pratensis +
Weedy  +, Introduced  +
Lathyrus rigidus +
Endemic  +
Lathyrus sphaericus +
Introduced  +
Lathyrus sulphureus var. argillaceus +
Conservation concern  +
Lathyrus sulphureus var. sulphureus +
Endemic  +
Lathyrus sylvestris +
Introduced  +
Lathyrus tingitanus +
Weedy  +, Introduced  +
Lathyrus torreyi +
Endemic  +
Lathyrus tracyi +
Endemic  +
Lathyrus tuberosus +
Weedy  +, Introduced  +
Lathyrus venosus +
Illustrated  +
Lathyrus venosus var. arkansanus +
Endemic  +
Lathyrus venosus var. intonsus +
Illustrated  +, Endemic  +
Lathyrus venosus var. venosus +
Endemic  +
Lathyrus vestitus var. ochropetalus +
Endemic  +
Launaea intybacea +
Introduced  +, Illustrated  +
Lavatera +
Introduced  +
Lavatera olbia +
Introduced  +
Lavatera thuringiaca +
Introduced  +, Illustrated  +
Lavatera trimestris +
Introduced  +
Layia carnosa +
Endemic  +, Conservation concern  +
Layia chrysanthemoides +
Endemic  +
Layia discoidea +
Endemic  +, Conservation concern  +
Layia fremontii +
Endemic  +
Layia gaillardioides +
Endemic  +
Layia glandulosa +
Illustrated  +
Layia heterotricha +
Endemic  +, Conservation concern  +
Layia hieracioides +
Endemic  +
Layia jonesii +
Endemic  +, Conservation concern  +
Layia leucopappa +
Endemic  +, Conservation concern  +
Layia munzii +
Endemic  +, Conservation concern  +
Layia pentachaeta +
Endemic  +
Layia pentachaeta subsp. albida +
Endemic  +
Layia pentachaeta subsp. pentachaeta +
Endemic  +
Layia platyglossa +
Illustrated  +
Layia septentrionalis +
Endemic  +, Conservation concern  +
Leavenworthia aurea +
Endemic  +, Conservation concern  +
Leavenworthia stylosa +
Illustrated  +, Endemic  +
Leavenworthia texana +
Endemic  +, Conservation concern  +
Leavenworthia torulosa +
Endemic  +
Leavenworthia uniflora +
Endemic  +
Lechea cernua +
Endemic  +
Lechea deckertii +
Endemic  +
Lechea divaricata +
Conservation concern  +, Endemic  +
Lechea intermedia +
Endemic  +
Lechea intermedia var. depauperata +
Conservation concern  +, Endemic  +
Lechea intermedia var. intermedia +
Endemic  +
Lechea intermedia var. juniperina +
Endemic  +
Lechea intermedia var. laurentiana +
Endemic  +
Lechea lakelae +
Conservation concern  +, Endemic  +
Lechea maritima +
Endemic  +
Lechea maritima var. maritima +
Endemic  +
Lechea maritima var. subcylindrica +
Endemic  +
Lechea maritima var. virginica +
Endemic  +
Lechea mensalis +
Conservation concern  +
Lechea minor +
Endemic  +
Lechea mucronata +
Endemic  +, Illustrated  +
Lechea pulchella +
Endemic  +
Lechea pulchella var. moniliformis +
Endemic  +
Lechea pulchella var. pulchella +
Endemic  +
Lechea pulchella var. ramosissima +
Endemic  +
Lechea racemulosa +
Endemic  +
Lechea san-sabeana +
Endemic  +, Illustrated  +
Lechea sessiliflora +
Endemic  +
Lechea stricta +
Endemic  +
Lechea tenuifolia +
Endemic  +, Illustrated  +
Leersia hexandra +
Endemic  +
Leersia lenticularis +
Endemic  +
Leersia virginica +
Endemic  +
Leibnitzia lyrata +
Illustrated  +
Leitneria floridana +
Conservation concern  +, Endemic  +, Illustrated  +
Lemna aequinoctialis +
Weedy  +, Illustrated  +
Lemna gibba +
Weedy  +, Illustrated  +
Lemna minor +
Weedy  +, Illustrated  +
Lemna minuta +
Weedy  +, Illustrated  +
Lemna obscura +
Weedy  +, Illustrated  +
Lemna perpusilla +
Weedy  +, Illustrated  +, Endemic  +
Lemna trisulca +
Weedy  +, Illustrated  +
Lemna turionifera +
Weedy  +, Illustrated  +
Lemna valdiviana +
Weedy  +, Illustrated  +
Lenophyllum texanum +
Illustrated  +
Lens +
Introduced  +
Lens culinaris +
Introduced  +, Illustrated  +
Leontodon autumnalis +
Introduced  +, Illustrated  +
Leontodon hispidus +
Introduced  +
Leontodon saxatilis subsp. longirostris +
Introduced  +
Leontodon saxatilis subsp. saxatilis +
Introduced  +
Lepanthopsis melanantha +
Illustrated  +
Lepidium acutidens +
Illustrated  +
Lepidium austrinum +
Weedy  +, Illustrated  +
Lepidium barnebyanum +
Illustrated  +, Endemic  +, Conservation concern  +
Lepidium campestre +
Weedy  +, Introduced  +, Illustrated  +
Lepidium davisii +
Illustrated  +, Endemic  +
Lepidium densiflorum +
Weedy  +, Illustrated  +
Lepidium dictyotum +
Illustrated  +
Lepidium draba +
Weedy  +, Introduced  +, Illustrated  +
Lepidium flavum +
Illustrated  +
Lepidium fremontii +
Illustrated  +, Endemic  +
Lepidium heterophyllum +
Introduced  +, Illustrated  +
Lepidium jaredii +
Illustrated  +, Endemic  +, Conservation concern  +
Lepidium lasiocarpum +
Weedy  +, Illustrated  +
Lepidium lasiocarpum subsp. lasiocarpum +
Weedy  +, Illustrated  +
Lepidium lasiocarpum subsp. wrightii +
Weedy  +, Illustrated  +
Lepidium latifolium +
Weedy  +, Introduced  +, Illustrated  +
Lepidium latipes +
Illustrated  +
Lepidium montanum +
Illustrated  +, Endemic  +
Lepidium nitidum +
Weedy  +, Illustrated  +
Lepidium oblongum +
Weedy  +, Illustrated  +
Lepidium ostleri +
Illustrated  +, Endemic  +, Conservation concern  +
Lepidium oxycarpum +
Illustrated  +, Endemic  +
Lepidium perfoliatum +
Weedy  +, Introduced  +, Illustrated  +
Lepidium pinnatifidum +
Introduced  +, Illustrated  +
Lepidium ramosissimum +
Illustrated  +
Lepidium ruderale +
Weedy  +, Introduced  +, Illustrated  +
Lepidium sativum +
Introduced  +, Illustrated  +
Lepidium sordidum +
Illustrated  +
Lepidium strictum +
Introduced  +, Illustrated  +
Lepidium thurberi +
Illustrated  +
Lepidium virginicum +
Weedy  +, Illustrated  +
Lepidium virginicum subsp. menziesii +
Weedy  +, Illustrated  +
Lepidium virginicum subsp. virginicum +
Weedy  +, Illustrated  +
Lepidospartum burgessii +
Endemic  +
Lepidospartum latisquamum +
Illustrated  +, Endemic  +
Leptarrhena pyrolifolia +
Illustrated  +, Endemic  +
Leptobryum pyriforme +
Illustrated  +
Leptochloa chloridiformis +
Introduced  +
Leptodictyum riparium +
Illustrated  +
Leptodictyum wallacei +
Endemic  +
Leptodon smithii +
Illustrated  +
Leptohymenium sharpii +
Endemic  +, Illustrated  +
Leptopterigynandrum austroalpinum +
Illustrated  +
Leptospron +
Introduced  +
Leptospron adenanthum +
Introduced  +, Illustrated  +
Leptostomopsis nivea +
Illustrated  +
Leptostomopsis systylia +
Illustrated  +
Lepuropetalon spathulatum +
Illustrated  +
Lepyrodiclis holosteoides +
Weedy  +, Introduced  +, Illustrated  +
Lescuraea saxicola +
Illustrated  +
Leskea australis +
Endemic  +
Leskea gracilescens +
Endemic  +, Illustrated  +
Leskea obscura +
Endemic  +, Illustrated  +
Leskeella nervosa +
Illustrated  +
Lespedeza angustifolia +
Endemic  +
Lespedeza bicolor +
Introduced  +
Lespedeza capitata +
Illustrated  +, Endemic  +
Lespedeza cuneata +
Weedy  +, Introduced  +
Lespedeza cyrtobotrya +
Introduced  +
Lespedeza daurica +
Introduced  +
Lespedeza frutescens +
Endemic  +
Lespedeza hirta +
Endemic  +
Lespedeza hirta subsp. curtissii +
Endemic  +
Lespedeza hirta subsp. hirta +
Endemic  +
Lespedeza leptostachya +
Illustrated  +, Endemic  +
Lespedeza procumbens +
Illustrated  +, Endemic  +
Lespedeza repens +
Endemic  +
Lespedeza stuevei +
Illustrated  +, Endemic  +
Lespedeza thunbergii +
Weedy  +, Introduced  +
Lespedeza violacea +
Endemic  +
Lessingia arachnoidea +
Endemic  +, Conservation concern  +
Lessingia germanorum +
Endemic  +
Lessingia glandulifera +
Illustrated  +
Lessingia glandulifera var. glandulifera +
Illustrated  +
Lessingia glandulifera var. peirsonii +
Endemic  +
Lessingia glandulifera var. tomentosa +
Endemic  +, Conservation concern  +
Lessingia hololeuca +
Endemic  +
Lessingia leptoclada +
Endemic  +
Lessingia micradenia +
Endemic  +, Conservation concern  +
Lessingia micradenia var. glabrata +
Endemic  +, Conservation concern  +
Lessingia micradenia var. micradenia +
Endemic  +, Conservation concern  +
Lessingia nana +
Endemic  +
Lessingia nemaclada +
Endemic  +
Lessingia pectinata +
Endemic  +
Lessingia pectinata var. pectinata +
Endemic  +
Lessingia pectinata var. tenuipes +
Endemic  +
Lessingia ramulosa +
Illustrated  +, Endemic  +
Lessingia tenuis +
Endemic  +
Lessingia virgata +
Endemic  +
Leucaena leucocephala +
Weedy  +, Introduced  +
Leucaena retusa +
Illustrated  +
Leucanthemella serotina +
Introduced  +, Illustrated  +
Leucanthemum lacustre +
Introduced  +
Leucanthemum maximum +
Introduced  +
Leucanthemum vulgare +
Introduced  +, Illustrated  +
Leuciva dealbata +
Illustrated  +
Leucocrinum montanum +
Illustrated  +, Endemic  +
Leucodon andrewsianus +
Endemic  +
Leucodon brachypus +
Endemic  +
Leucodon julaceus +
Illustrated  +
Leucojum aestivum +
Introduced  +, Illustrated  +
Leucolepis +
Endemic  +
Leucolepis acanthoneura +
Endemic  +, Illustrated  +
Leucophyllum frutescens +
Weedy  +, Illustrated  +
Leucophysalis +
Endemic  +
Leucophysalis grandiflora +
Illustrated  +, Endemic  +
Leucophysalis nana +
Endemic  +
Leucospora multifida +
Endemic  +, Illustrated  +
Lewisia cantelovii +
Illustrated  +, Endemic  +
Lewisia columbiana +
Endemic  +
Lewisia columbiana var. columbiana +
Endemic  +
Lewisia columbiana var. rupicola +
Endemic  +
Lewisia columbiana var. wallowensis +
Endemic  +
Lewisia congdonii +
Endemic  +, Conservation concern  +
Lewisia cotyledon +
Endemic  +
Lewisia cotyledon var. cotyledon +
Endemic  +
Lewisia cotyledon var. heckneri +
Endemic  +
Lewisia cotyledon var. howellii +
Endemic  +
Lewisia disepala +
Endemic  +, Conservation concern  +
Lewisia kelloggii +
Endemic  +
Lewisia leeana +
Endemic  +
Lewisia longipetala +
Endemic  +, Conservation concern  +
Lewisia maguirei +
Endemic  +, Conservation concern  +
Lewisia nevadensis +
Endemic  +
Lewisia oppositifolia +
Endemic  +
Lewisia pygmaea +
Illustrated  +, Endemic  +
Lewisia rediviva +
Illustrated  +, Endemic  +
Lewisia rediviva var. minor +
Endemic  +
Lewisia rediviva var. rediviva +
Illustrated  +, Endemic  +
Lewisia stebbinsii +
Endemic  +, Conservation concern  +
Lewisia triphylla +
Illustrated  +, Endemic  +
Leymus arenarius +
Introduced  +
Leymus cinereus +
Endemic  +
Leymus condensatus +
Endemic  +
Leymus innovatus +
Endemic  +
Leymus innovatus subsp. innovatus +
Endemic  +
Leymus innovatus subsp. velutinus +
Endemic  +
Leymus pacificus +
Endemic  +
Leymus salina subsp. mojavensis +
Endemic  +
Leymus triticoides +
Endemic  +
Liatris acidota +
Illustrated  +, Endemic  +
Liatris aspera +
Illustrated  +, Endemic  +
Liatris bracteata +
Endemic  +
Liatris chapmanii +
Endemic  +
Liatris compacta +
Endemic  +
Liatris cylindracea +
Illustrated  +, Endemic  +
Liatris cymosa +
Endemic  +
Liatris elegans +
Illustrated  +, Endemic  +
Liatris elegans var. bridgesii +
Illustrated  +, Endemic  +
Liatris elegans var. carizzana +
Endemic  +
Liatris elegans var. elegans +
Illustrated  +, Endemic  +
Liatris elegans var. kralii +
Illustrated  +, Endemic  +
Liatris elegantula +
Endemic  +
Liatris gracilis +
Illustrated  +, Endemic  +
Liatris helleri +
Endemic  +
Liatris hirsuta +
Endemic  +
Liatris laevigata +
Endemic  +
Liatris lancifolia +
Endemic  +
Liatris ligulistylis +
Endemic  +
Liatris microcephala +
Endemic  +
Liatris ohlingerae +
Endemic  +
Liatris pauciflora +
Endemic  +
Liatris pauciflora var. pauciflora +
Endemic  +
Liatris pauciflora var. secunda +
Endemic  +
Liatris pilosa +
Endemic  +
Liatris provincialis +
Endemic  +
Liatris punctata var. mucronata +
Endemic  +
Liatris punctata var. punctata +
Endemic  +
Liatris pycnostachya +
Endemic  +
Liatris pycnostachya var. lasiophylla +
Endemic  +
Liatris pycnostachya var. pycnostachya +
Endemic  +
Liatris scariosa +
Endemic  +
Liatris scariosa var. nieuwlandii +
Endemic  +
Liatris scariosa var. novaeangliae +
Endemic  +
Liatris scariosa var. scariosa +
Endemic  +
Liatris spicata +
Endemic  +
Liatris spicata var. resinosa +
Endemic  +
Liatris spicata var. spicata +
Endemic  +
Liatris squarrosa +
Illustrated  +, Endemic  +
Liatris squarrosa var. glabrata +
Illustrated  +, Endemic  +
Liatris squarrosa var. squarrosa +
Endemic  +
Liatris squarrulosa +
Endemic  +
Liatris tenuifolia +
Endemic  +
Liatris tenuis +
Endemic  +
Liatris virgata +
Endemic  +
Libertia formosa +
Introduced  +, Illustrated  +
Licania michauxii +
Endemic  +, Illustrated  +
Licaria triandra +
Illustrated  +
Ligularia dentata +
Introduced  +, Illustrated  +
Lilaea scilloides +
Illustrated  +
Lilium bolanderi +
Illustrated  +, Endemic  +
Lilium canadense +
Illustrated  +, Endemic  +
Lilium catesbaei +
Illustrated  +, Endemic  +
Lilium columbianum +
Illustrated  +, Endemic  +
Lilium grayi +
Illustrated  +, Endemic  +
Lilium humboldtii +
Illustrated  +, Endemic  +
Lilium humboldtii subsp. humboldtii +
Illustrated  +, Endemic  +
Lilium humboldtii subsp. ocellatum +
Endemic  +
Lilium iridollae +
Illustrated  +, Endemic  +, Conservation concern  +
Lilium kelleyanum +
Illustrated  +, Endemic  +
Lilium kelloggii +
Illustrated  +, Endemic  +
Lilium lancifolium +
W1  +, Introduced  +, Illustrated  +
Lilium maritimum +
Illustrated  +, Endemic  +, Conservation concern  +
Lilium michauxii +
Illustrated  +, Endemic  +
Lilium michiganense +
Illustrated  +, Endemic  +
Lilium occidentale +
Illustrated  +, Endemic  +, Conservation concern  +
Lilium pardalinum +
Illustrated  +, Endemic  +
Lilium pardalinum subsp. pardalinum +
Illustrated  +, Endemic  +
Lilium pardalinum subsp. pitkinense +
Illustrated  +, Endemic  +, Conservation concern  +
Lilium pardalinum subsp. shastense +
Endemic  +
Lilium pardalinum subsp. vollmeri +
Endemic  +
Lilium pardalinum subsp. wigginsii +
Illustrated  +, Endemic  +
Lilium parryi +
Illustrated  +, Endemic  +
Lilium parvum +
Illustrated  +, Endemic  +
Lilium philadelphicum +
Illustrated  +, Endemic  +
Lilium rubescens +
Illustrated  +, Endemic  +
Lilium superbum +
Illustrated  +, Endemic  +
Lilium washingtonianum +
Illustrated  +, Endemic  +
Lilium washingtonianum subsp. purpurascens +
Endemic  +
Lilium washingtonianum subsp. washingtonianum +
Illustrated  +, Endemic  +
Limbella fryei +
Endemic  +, Illustrated  +
Limnanthes alba +
Endemic  +
Limnanthes alba subsp. alba +
Endemic  +
Limnanthes alba subsp. gracilis +
Endemic  +
Limnanthes alba subsp. parishii +
Endemic  +
Limnanthes alba subsp. versicolor +
Endemic  +
Limnanthes bakeri +
Endemic  +, Conservation concern  +
Limnanthes douglasii +
Illustrated  +, Endemic  +
Limnanthes douglasii subsp. douglasii +
Illustrated  +, Endemic  +
Limnanthes douglasii subsp. nivea +
Illustrated  +, Endemic  +
Limnanthes douglasii subsp. rosea +
Illustrated  +, Endemic  +
Limnanthes douglasii subsp. striata +
Illustrated  +, Endemic  +
Limnanthes douglasii subsp. sulphurea +
Illustrated  +, Endemic  +
Limnanthes floccosa +
Illustrated  +, Endemic  +
Limnanthes floccosa subsp. bellingeriana +
Illustrated  +, Endemic  +
Limnanthes floccosa subsp. californica +
Illustrated  +, Endemic  +
Limnanthes floccosa subsp. floccosa +
Illustrated  +, Endemic  +
Limnanthes floccosa subsp. grandiflora +
Endemic  +, Conservation concern  +
Limnanthes floccosa subsp. pumila +
Illustrated  +, Endemic  +
Limnanthes macounii +
Endemic  +, Conservation concern  +
Limnanthes montana +
Endemic  +
Limnanthes vinculans +
Endemic  +, Conservation concern  +
Limnobium spongia +
Illustrated  +, Endemic  +
Limnophila +
Introduced  +
Limnophila indica +
Introduced  +
Limnophila sessiliflora +
Weedy  +, Introduced  +, Illustrated  +
Limonium arborescens +
Introduced  +
Limonium carolinianum +
Illustrated  +
Limonium limbatum +
Endemic  +
Limonium otolepis +
Introduced  +
Limonium perezii +
Introduced  +
Limonium ramosissimum +
Introduced  +
Limonium sinuatum +
Introduced  +
Limosella aquatica +
Illustrated  +
Linaria +
Introduced  +
Linaria bipartita +
Introduced  +
Linaria dalmatica +
Weedy  +, Introduced  +, Illustrated  +
Linaria dalmatica subsp. dalmatica +
Introduced  +, Illustrated  +
Linaria dalmatica subsp. macedonica +
Introduced  +
Linaria genistifolia +
Introduced  +
Linaria genistifolia subsp. genistifolia +
Introduced  +
Linaria grandiflora +
Introduced  +
Linaria maroccana +
Introduced  +
Linaria purpurea +
Introduced  +
Linaria repens +
Introduced  +
Linaria spartea +
Introduced  +
Linaria triornithophora +
Introduced  +
Linaria vulgaris +
Weedy  +, Introduced  +, Illustrated  +
Lindbergia mexicana +
Illustrated  +
Lindera benzoin +
Endemic  +
Lindera melissifolia +
Conservation concern  +, Endemic  +, Illustrated  +
Lindera subcoriacea +
Conservation concern  +, Endemic  +, Illustrated  +
Lindernia antipoda +
Introduced  +
Lindernia ciliata +
Introduced  +
Lindernia crustacea +
Introduced  +
Lindernia dubia +
Weedy  +, Illustrated  +
Lindernia grandiflora +
Weedy  +, Endemic  +
Lindernia monticola +
Endemic  +
Lindheimera texana +
Illustrated  +
Linum allredii +
Endemic  +, Conservation concern  +
Linum arenicola +
Endemic  +, Conservation concern  +
Linum berlandieri var. berlandieri +
Endemic  +
Linum bienne +
Weedy  +, Introduced  +
Linum carteri +
Endemic  +, Conservation concern  +
Linum carteri var. carteri +
Endemic  +, Conservation concern  +
Linum carteri var. smallii +
Endemic  +, Conservation concern  +
Linum catharticum +
Weedy  +, Introduced  +
Linum compactum +
Endemic  +
Linum elongatum +
Illustrated  +
Linum floridanum var. chrysocarpum +
Endemic  +
Linum grandiflorum +
Introduced  +
Linum harperi +
Endemic  +
Linum hudsonioides +
Endemic  +
Linum imbricatum +
Endemic  +
Linum intercursum +
Endemic  +
Linum kingii +
Endemic  +, Illustrated  +
Linum lewisii +
Illustrated  +
Linum lewisii var. alpicola +
Endemic  +
Linum lewisii var. lepagei +
Endemic  +, Conservation concern  +
Linum lewisii var. lewisii +
Illustrated  +
Linum macrocarpum +
Endemic  +, Conservation concern  +
Linum medium +
Illustrated  +
Linum medium var. medium +
Endemic  +
Linum medium var. texanum +
Illustrated  +
Linum perenne +
Introduced  +, Illustrated  +
Linum pratense +
Endemic  +
Linum rigidum var. simulans +
Endemic  +
Linum rupestre +
Illustrated  +
Linum sect. Cathartolinum +
Introduced  +
Linum striatum +
Endemic  +
Linum subteres +
Endemic  +
Linum sulcatum +
Endemic  +
Linum trigynum +
Introduced  +
Linum usitatissimum +
Weedy  +, Introduced  +
Linum virginianum +
Endemic  +
Linum westii +
Endemic  +, Conservation concern  +
Liparis liliifolia +
Illustrated  +, Endemic  +
Lipocarpha aristulata +
Illustrated  +, Endemic  +
Lipocarpha drummondii +
Illustrated  +, Endemic  +
Lipocarpha maculata +
Illustrated  +, Endemic  +
Lipocarpha micrantha +
Illustrated  +
Lipocarpha microcephala +
Introduced  +, Illustrated  +
Lipocarpha occidentalis +
Illustrated  +, Endemic  +
Liquidambar styraciflua +
Illustrated  +, W1  +
Liriodendron tulipifera +
Endemic  +, Illustrated  +, W1  +
Listera auriculata +
Endemic  +
Listera australis +
Endemic  +
Listera borealis +
Endemic  +
Listera caurina +
Endemic  +
Listera convallarioides +
Illustrated  +, Endemic  +
Listera cordata +
Illustrated  +
Listera cordata var. cordata +
Illustrated  +
Listera cordata var. nephrophylla +
Endemic  +
Listera ovata +
Introduced  +
Listera smallii +
Endemic  +
Lithocarpus densiflorus +
Illustrated  +, Endemic  +
Lithocarpus densiflorus var. densiflorus +
Endemic  +, Illustrated  +
Lithocarpus densiflorus var. echinoides +
Endemic  +
Lithophragma affine +
Endemic  +
Lithophragma bolanderi +
Endemic  +
Lithophragma campanulatum +
Endemic  +
Lithophragma cymbalaria +
Endemic  +
Lithophragma glabrum +
Endemic  +
Lithophragma heterophyllum +
Endemic  +
Lithophragma maximum +
Endemic  +, Conservation concern  +
Lithophragma parviflorum +
Illustrated  +, Endemic  +
Lithophragma tenellum +
Endemic  +
Lithophragma trifoliatum +
Endemic  +
Litsea aestivalis +
Endemic  +, Illustrated  +
Littorella americana +
Endemic  +, Illustrated  +
Livistona chinensis +
Introduced  +, Illustrated  +
Livistona rotundifolia +
Introduced  +
Lloydia serotina +
Illustrated  +
Lloydia serotina var. flava +
Endemic  +
Lloydia serotina var. serotina +
Illustrated  +
Lobularia maritima +
Weedy  +, Introduced  +, Illustrated  +
Loeflingia squarrosa +
Illustrated  +
Loeskeobryum brevirostre +
Illustrated  +
Loeskypnum badium +
Illustrated  +
Loeskypnum wickesiae +
Illustrated  +
Logfia arvensis +
Weedy  +, Introduced  +
Logfia filaginoides +
Illustrated  +
Logfia gallica +
Introduced  +
Logfia minima +
Introduced  +
Lomariopsis kunzeana +
Illustrated  +
Lomatogonium rotatum +
Illustrated  +
Lomatogonium rotatum var. fontanum +
Endemic  +
Lomatogonium rotatum var. rotatum +
Illustrated  +
Lophiola aurea +
Illustrated  +, Endemic  +
Lophophora williamsii +
Illustrated  +
Lorandersonia linifolia +
Endemic  +
Lorandersonia microcephala +
Endemic  +, Conservation concern  +
Lorandersonia peirsonii +
Endemic  +
Lorandersonia pulchella +
Illustrated  +
Lorandersonia salicina +
Endemic  +
Lorandersonia spathulata +
Endemic  +
Lotus +
Introduced  +
Lotus angustissimus +
Introduced  +
Lotus corniculatus +
Weedy  +, Introduced  +, Illustrated  +
Lotus krylovii +
Introduced  +
Lotus subbiflorus +
Introduced  +
Lotus tenuis +
Weedy  +, Introduced  +
Lotus uliginosus +
Introduced  +
Luetkea +
Endemic  +
Luetkea pectinata +
Endemic  +, Illustrated  +
Luffa +
Introduced  +
Luffa acutangula +
Introduced  +
Luffa acutangula var. acutangula +
Introduced  +
Luffa aegyptiaca +
Introduced  +, Illustrated  +
Luina hypoleuca +
Illustrated  +, Endemic  +
Luina serpentina +
Endemic  +, Conservation concern  +
Lunaria annua +
Introduced  +, Illustrated  +
Lupinus adsurgens +
Endemic  +
Lupinus affinis +
Endemic  +
Lupinus albicaulis +
Illustrated  +, Endemic  +
Lupinus albifrons var. abramsii +
Endemic  +, Conservation concern  +
Lupinus albifrons var. albifrons +
Endemic  +
Lupinus albifrons var. collinus +
Endemic  +
Lupinus albifrons var. douglasii +
Endemic  +
Lupinus albifrons var. johnstonii +
Endemic  +
Lupinus albifrons var. medius +
Conservation concern  +
Lupinus andersonii +
Endemic  +
Lupinus angustiflorus +
Endemic  +
Lupinus antoninus +
Endemic  +, Conservation concern  +
Lupinus apertus +
Endemic  +
Lupinus arbustus +
Endemic  +
Lupinus arcticus +
Endemic  +
Lupinus argenteus +
Illustrated  +
Lupinus argenteus var. argentatus +
Endemic  +
Lupinus argenteus var. argenteus +
Endemic  +
Lupinus argenteus var. argophyllus +
Endemic  +
Lupinus argenteus var. fulvomaculatus +
Endemic  +
Lupinus argenteus var. heteranthus +
Endemic  +
Lupinus argenteus var. hillii +
Endemic  +
Lupinus argenteus var. holosericeus +
Endemic  +
Lupinus argenteus var. meionanthus +
Endemic  +
Lupinus argenteus var. moabensis +
Endemic  +
Lupinus argenteus var. montigenus +
Endemic  +
Lupinus argenteus var. palmeri +
Endemic  +
Lupinus argenteus var. parviflorus +
Endemic  +
Lupinus argenteus var. rubricaulis +
Endemic  +
Lupinus argenteus var. utahensis +
Illustrated  +, Endemic  +
Lupinus arizonicus +
Illustrated  +
Lupinus benthamii +
Endemic  +
Lupinus bicolor +
Illustrated  +
Lupinus breweri +
Endemic  +
Lupinus breweri var. breweri +
Endemic  +
Lupinus breweri var. bryoides +
Endemic  +
Lupinus breweri var. grandiflorus +
Endemic  +
Lupinus cervinus +
Endemic  +
Lupinus chamissonis +
Endemic  +
Lupinus citrinus +
Endemic  +
Lupinus citrinus var. citrinus +
Endemic  +, Conservation concern  +
Lupinus citrinus var. deflexus +
Endemic  +, Conservation concern  +
Lupinus constancei +
Conservation concern  +
Lupinus covillei +
Endemic  +
Lupinus croceus +
Endemic  +
Lupinus dalesiae +
Endemic  +
Lupinus diffusus +
Illustrated  +, Endemic  +
Lupinus duranii +
Endemic  +, Conservation concern  +
Lupinus elatus +
Endemic  +
Lupinus elmeri +
Endemic  +
Lupinus flavoculatus +
Endemic  +
Lupinus formosus var. robustus +
Endemic  +
Lupinus fulcratus +
Endemic  +
Lupinus gracilentus +
Conservation concern  +
Lupinus guadalupensis +
Conservation concern  +
Lupinus huachucanus +
Conservation concern  +
Lupinus kingii +
Illustrated  +, Endemic  +
Lupinus kuschei +
Endemic  +
Lupinus lapidicola +
Endemic  +
Lupinus latifolius +
Illustrated  +
Lupinus latifolius var. dudleyi +
Endemic  +
Lupinus latifolius var. latifolius +
Illustrated  +
Lupinus latifolius var. parishii +
Illustrated  +
Lupinus latifolius var. subalpinus +
Endemic  +
Lupinus latifolius var. viridifolius +
Endemic  +
Lupinus lepidus +
Illustrated  +
Lupinus lepidus var. aridus +
Endemic  +
Lupinus lepidus var. ashlandensis +
Endemic  +, Conservation concern  +
Lupinus lepidus var. confertus +
Endemic  +
Lupinus lepidus var. culbertsonii +
Endemic  +, Conservation concern  +
Lupinus lepidus var. cusickii +
Illustrated  +, Endemic  +, Conservation concern  +
Lupinus lepidus var. lepidus +
Endemic  +
Lupinus lepidus var. lobbii +
Endemic  +
Lupinus lepidus var. ramosus +
Endemic  +
Lupinus lepidus var. sellulus +
Endemic  +
Lupinus lepidus var. utahensis +
Endemic  +
Lupinus leucophyllus +
Illustrated  +, Endemic  +
Lupinus littoralis +
Illustrated  +
Lupinus littoralis var. littoralis +
Illustrated  +, Endemic  +
Lupinus littoralis var. variicolor +
Endemic  +
Lupinus ludovicianus +
Endemic  +, Conservation concern  +
Lupinus luteolus +
Endemic  +
Lupinus magnificus var. glarecola +
Endemic  +
Lupinus magnificus var. hesperius +
Conservation concern  +
Lupinus magnificus var. magnificus +
Endemic  +, Conservation concern  +
Lupinus malacophyllus +
Endemic  +, Conservation concern  +
Lupinus microcarpus +
Illustrated  +
Lupinus microcarpus var. densiflorus +
Illustrated  +
Lupinus microcarpus var. horizontalis +
Endemic  +
Lupinus microcarpus var. microcarpus +
Illustrated  +
Lupinus nanus +
Endemic  +
Lupinus nevadensis +
Endemic  +
Lupinus nipomensis +
Endemic  +, Conservation concern  +
Lupinus nootkatensis +
Illustrated  +
Lupinus nootkatensis var. fruticosus +
Endemic  +
Lupinus nootkatensis var. nootkatensis +
Illustrated  +
Lupinus obtusilobus +
Endemic  +
Lupinus odoratus +
Endemic  +
Lupinus onustus +
Endemic  +
Lupinus oreganus +
Endemic  +, Conservation concern  +
Lupinus pachylobus +
Endemic  +
Lupinus padrecrowleyi +
Endemic  +, Conservation concern  +
Lupinus peirsonii +
Endemic  +, Conservation concern  +
Lupinus perennis +
Illustrated  +, Endemic  +
Lupinus polyphyllus +
Illustrated  +, Endemic  +
Lupinus polyphyllus var. ammophilus +
Endemic  +
Lupinus polyphyllus var. burkei +
Illustrated  +, Endemic  +
Lupinus polyphyllus var. humicola +
Endemic  +
Lupinus polyphyllus var. polyphyllus +
Endemic  +
Lupinus polyphyllus var. prunophilus +
Endemic  +
Lupinus polyphyllus var. saxosus +
Endemic  +
Lupinus pratensis +
Endemic  +
Lupinus pusillus +
Endemic  +
Lupinus pusillus var. intermontanus +
Endemic  +
Lupinus pusillus var. pusillus +
Endemic  +
Lupinus pusillus var. rubens +
Endemic  +
Lupinus rivularis +
Endemic  +
Lupinus sabineanus +
Endemic  +
Lupinus sericatus +
Endemic  +, Conservation concern  +
Lupinus sericeus +
Illustrated  +, Endemic  +
Lupinus shockleyi +
Endemic  +
Lupinus sierrae-blancae +
Endemic  +
Lupinus spectabilis +
Endemic  +, Conservation concern  +
Lupinus stiversii +
Endemic  +
Lupinus sulphureus +
Illustrated  +
Lupinus sulphureus var. bingenensis +
Endemic  +
Lupinus sulphureus var. sulphureus +
Illustrated  +
Lupinus tidestromii +
Endemic  +, Conservation concern  +
Lupinus tracyi +
Endemic  +, Conservation concern  +
Lupinus uncialis +
Endemic  +
Lupinus villosus +
Endemic  +
Lupinus westianus +
Endemic  +
Lupinus westianus var. aridorum +
Endemic  +, Conservation concern  +
Lupinus westianus var. westianus +
Endemic  +
Luziola bahiensis +
Introduced  +
Luziola peruviana +
Introduced  +
Luzula acuminata +
Illustrated  +, Endemic  +
Luzula acuminata var. acuminata +
Illustrated  +, Endemic  +
Luzula acuminata var. carolinae +
Illustrated  +, Endemic  +
Luzula arcuata +
Illustrated  +
Luzula arcuata subsp. unalaschkensis +
Illustrated  +
Luzula bulbosa +
Illustrated  +, Endemic  +
Luzula campestris +
Weedy  +, Introduced  +
Luzula comosa +
Endemic  +
Luzula confusa +
Illustrated  +
Luzula divaricata +
Endemic  +
Luzula echinata +
Illustrated  +, Endemic  +
Luzula groenlandica +
Endemic  +
Luzula hitchcockii +
Endemic  +
Luzula kjellmaniana +
Illustrated  +
Luzula luzuloides +
Introduced  +
Luzula luzuloides subsp. luzuloides +
Introduced  +
Luzula multiflora +
Illustrated  +
Luzula multiflora subsp. frigida +
Illustrated  +
Luzula multiflora subsp. kobayasii +
Illustrated  +
Luzula multiflora subsp. multiflora +
Introduced  +, Illustrated  +
Luzula nivalis +
Illustrated  +
Luzula orestera +
Endemic  +
Luzula pallidula +
Introduced  +
Luzula parviflora +
Illustrated  +
Luzula spicata +
Illustrated  +
Luzula subcapitata +
Illustrated  +, Endemic  +
Luzula subcongesta +
Endemic  +
Lycianthes +
Introduced  +
Lycianthes asarifolia +
Weedy  +, Introduced  +, Illustrated  +
Lycianthes rantonnetii +
Introduced  +
Lycium andersonii +
Illustrated  +
Lycium barbarum +
Weedy  +, Introduced  +
Lycium berlandieri +
Weedy  +
Lycium californicum +
Illustrated  +
Lycium chinense +
Introduced  +
Lycium cooperi +
Illustrated  +, Endemic  +
Lycium ferocissimum +
Weedy  +, Introduced  +
Lycium shockleyi +
Endemic  +
Lycium texanum +
Endemic  +, Conservation concern  +
Lycopodiella alopecuroides +
Illustrated  +
Lycopodiella appressa +
Illustrated  +
Lycopodiella prostrata +
Endemic  +
Lycopodium annotinum +
Illustrated  +, Endemic  +
Lycopodium dendroideum +
Illustrated  +
Lycopodium obscurum +
Illustrated  +, Endemic  +
Lygodesmia aphylla +
Endemic  +
Lygodesmia grandiflora +
Endemic  +
Lygodesmia grandiflora var. arizonica +
Endemic  +
Lygodesmia grandiflora var. dianthopsis +
Endemic  +
Lygodesmia grandiflora var. doloresensis +
Endemic  +
Lygodesmia grandiflora var. entrada +
Endemic  +, Conservation concern  +
Lygodesmia grandiflora var. grandiflora +
Endemic  +
Lygodesmia juncea +
Illustrated  +, Endemic  +
Lygodesmia texana +
Illustrated  +
Lygodium japonicum +
Introduced  +, Illustrated  +
Lygodium microphyllum +
Introduced  +
Lygodium palmatum +
Illustrated  +, Endemic  +
Lyonia ferruginea +
Illustrated  +, Endemic  +
Lyonia fruticosa +
Endemic  +
Lyonia ligustrina +
Endemic  +
Lyonia ligustrina var. foliosiflora +
Endemic  +
Lyonia ligustrina var. ligustrina +
Endemic  +
Lyonia mariana +
Endemic  +
Lyonothamnus +
Conservation concern  +, Endemic  +
Lyonothamnus floribundus +
Conservation concern  +, Endemic  +, Illustrated  +
Lyrocarpa coulteri +
Illustrated  +
Lysichiton americanus +
Illustrated  +, Endemic  +
Lysiloma latisiliquum +
Illustrated  +
Lysiloma sabicu +
Introduced  +
Lysimachia asperulifolia +
Endemic  +
Lysimachia ciliata +
Weedy  +, Endemic  +
Lysimachia clethroides +
Introduced  +
Lysimachia fraseri +
Endemic  +, Conservation concern  +
Lysimachia hybrida +
Endemic  +
Lysimachia lanceolata +
Endemic  +
Lysimachia loomisii +
Endemic  +
Lysimachia nummularia +
Weedy  +, Introduced  +, Illustrated  +
Lysimachia punctata +
Weedy  +, Introduced  +
Lysimachia quadriflora +
Illustrated  +, Endemic  +
Lysimachia quadrifolia +
Endemic  +
Lysimachia radicans +
Endemic  +
Lysimachia terrestris +
Weedy  +, Illustrated  +, Endemic  +
Lysimachia tonsa +
Endemic  +
Lysimachia vulgaris +
Weedy  +, Introduced  +
M
Maackia +
Introduced  +
Maackia buergeri +
Introduced  +, Illustrated  +
Mabrya +
Conservation concern  +
Mabrya acerifolia +
Endemic  +, Conservation concern  +, Illustrated  +
Machaeranthera tanacetifolia +
Illustrated  +
Macleaya cordata +
Introduced  +, Illustrated  +
Maclura pomifera +
Endemic  +, Illustrated  +, W1  +
Macradenia lutescens +
Illustrated  +
Macranthera +
Endemic  +
Macranthera flammea +
Endemic  +, Illustrated  +
Macrocoma tenuis +
Illustrated  +
Macrocoma tenuis subsp. sullivantii +
Illustrated  +
Macromitrium richardii +
Illustrated  +
Macroptilium gibbosifolium +
Illustrated  +
Macroptilium lathyroides +
Introduced  +
Macrothelypteris torresiana +
Introduced  +, Illustrated  +
Madia anomala +
Endemic  +
Madia citrigracilis +
Endemic  +
Madia citriodora +
Endemic  +
Madia elegans +
Illustrated  +
Madia glomerata +
Endemic  +
Madia radiata +
Endemic  +, Conservation concern  +
Madia sativa +
Illustrated  +
Madia subspicata +
Endemic  +
Magnolia acuminata +
Endemic  +
Magnolia ashei +
Conservation concern  +, Endemic  +, Illustrated  +
Magnolia fraseri +
Endemic  +, Illustrated  +
Magnolia grandiflora +
Endemic  +
Magnolia macrophylla +
Endemic  +, Illustrated  +
Magnolia pyramidata +
Endemic  +, Illustrated  +
Magnolia tripetala +
Endemic  +
Magnolia virginiana +
Endemic  +
Maianthemum canadense +
W1  +, Illustrated  +, Endemic  +
Maianthemum racemosum +
Illustrated  +
Maianthemum racemosum subsp. amplexicaule +
Illustrated  +
Maianthemum racemosum subsp. racemosum +
Illustrated  +, Endemic  +
Malachra capitata +
Illustrated  +
Malacomeles +
Endemic  +
Malacomeles denticulata +
Illustrated  +
Malacothamnus abbottii +
Conservation concern  +, Endemic  +
Malacothamnus aboriginum +
Endemic  +
Malacothamnus clementinus +
Conservation concern  +, Endemic  +
Malacothamnus davidsonii +
Conservation concern  +, Endemic  +
Malacothamnus fasciculatus +
Illustrated  +
Malacothamnus fremontii +
Endemic  +
Malacothamnus jonesii +
Endemic  +
Malacothamnus palmeri +
Endemic  +, Illustrated  +
Malacothrix californica +
Illustrated  +
Malacothrix coulteri +
Endemic  +
Malacothrix floccifera +
Endemic  +
Malacothrix foliosa +
Endemic  +
Malacothrix foliosa subsp. crispifolia +
Endemic  +
Malacothrix foliosa subsp. foliosa +
Endemic  +
Malacothrix foliosa subsp. philbrickii +
Endemic  +
Malacothrix foliosa subsp. polycephala +
Endemic  +
Malacothrix incana +
Endemic  +
Malacothrix indecora +
Illustrated  +, Endemic  +, Conservation concern  +
Malacothrix phaeocarpa +
Endemic  +
Malacothrix saxatilis +
Endemic  +
Malacothrix saxatilis var. arachnoidea +
Endemic  +, Conservation concern  +