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Make this a subcategory of another category (optional): Abelmoschus Abies Abietinella Abildgaardia Abronia Abronia nana Abronia umbellata Abronia villosa Abutilon Acaena Acalypha Acamptopappus Acamptopappus sphaerocephalus Acanthocereus Acanthoscyphus Acanthoscyphus parishii Acanthospermum Acaulon Acaulon muticum Achatocarpaceae Achillea Achlys Achnatherum Achnatherum lemmonii Achnatherum nelsonii Achnatherum occidentale Achnatherum parishii Achyrachaena Achyranthes Achyranthes aspera Achyronychia Acleisanthes Acleisanthes lanceolata Acmella Acoelorraphe Aconitum Aconitum columbianum Aconitum maximum Aconogonon Aconogonon alaskanum Aconogonon davisiae Aconogonon phytolaccifolium Acoraceae Acorus Acourtia Acrachne Acrocomia Acroporium Acroptilon Acrostichum Actaea Actinostachys Adelia Adenocaulon Adenophyllum Adenophyllum wrightii Adenostoma Adenostoma fasciculatum Adiantum Adlumia Adolphia Adonis Aegilops Aegopogon Aeluropus Aeonium Aeonium arboreum Agalinis Agalinis maritima Agalinis purpurea Agarista Agavaceae Agave Agave americana Agave americana subsp. americana Agave asperrima Agave deserti Agave parryi Agave parryi subsp. parryi Agave parviflora Agave schottii Agave shawii Agave toumeyana Agave utahensis Agave utahensis subsp. utahensis Agdestis Ageratina Ageratina altissima Ageratum Agnorhiza Agoseris Agoseris apargioides Agoseris aurantiaca Agoseris glauca Agoseris grandiflora Agoseris heterophylla Agrimonia Agropyron Agrostemma Agrostemma githago Agrostis Aira Aira caryophyllea Aizoaceae Akebia Alcea Alchemilla Alchemilla filicaulis Aletris Alisma Alismataceae Alkekengi Allamanda Allenrolfea Alliaria Allionia Allionia incarnata Allium Allium atrorubens Allium bolanderi Allium canadense Allium fimbriatum Allium geyeri Allium howellii Allium lacunosum Allium obtusum Allium paniculatum Allium peninsulare Allium perdulce Allium sanbornii Allium sativum Allium tolmiei Allium tricoccum Allolepis Alloteropsis Allotropa Allowissadula Almutaster Alnus Alnus alnobetula Alnus incana Alnus viridis Aloaceae Aloe Aloina Aloina aloides Aloina rigida Alopecurus Alopecurus aequalis Alophia Alpinia Alsia Alstonia Alstroemeria Alternanthera Alternanthera ficoidea Althaea Alvaradoa Alvaradoa amorphoides Alyssum Amaranthaceae Amaranthus Amaranthus sect. Acanthochiton Amaranthus sect. Acnida Amaranthus sect. Saueranthus Amaranthus subg. Acnida Amaranthus subg. Albersia Amaranthus subg. Amaranthus Amauriopsis Amberboa Amblyodon Amblyolepis Amblyopappus Amblystegiaceae Amblystegium Ambrosia Amelanchier Amelanchier alnifolia Amelanchier canadensis Amelichloa Amerorchis Amianthium Ammannia Ammophila Ammophila breviligulata Amoreuxia Ampelaster Ampelodesmos Ampelopsis Amphiachyris Amphibromus Amphicarpum Amphidium Amphipappus Amphipappus fremontii Amphiscirpus Amsonia Amsonia ciliata Amsonia longiflora Amsonia subg. Amsonia Amsonia subg. Articularia Amsonia subg. Sphinctosiphon Amsonia tabernaemontana Amsonia tomentosa Anacamptodon Anacolia Anagallis Anaphalis Ancistrocactus Ancistrocarphus Andreaea Andreaeaceae Andreaeobryaceae Andreaeobryum Andromeda Andromeda polifolia Andropogon Andropogon glomeratus Andropogon gyrans Andropogon sect. Andropogon Andropogon sect. Leptopogon Andropogon ternarius Andropogon virginicus Androsace Androsace chamaejasme Androsace elongata Androstephium Anelsonia Anemia Anemiaceae Anemone Anemone drummondii Anemone edwardsiana Anemone multifida Anemone narcissiflora Anemone oregana Anemone patens Anemone quinquefolia Anemone virginiana Anemopsis Angadenia Angelonia Angle Aniseia Anisocarpus Anisocoma Annona Annonaceae Anoda Anoectangium Anomobryum Anomodon Anomodontaceae Anredera Antennaria Antennaria friesiana Antennaria howellii Antennaria luzuloides Antennaria monocephala Antennaria parlinii Antennaria pulcherrima Antennaria rosea Anthemis Anthenantia Anthephora Anthoxanthum Anthoxanthum monticola Antigonon Antirrhinum Antitrichia Anulocaulis Anulocaulis leiosolenus Aongstroemia Apacheria Apera Aphanes Aphanisma Aphanorrhegma Aphanostephus Aphanostephus ramosissimus Aphanostephus skirrhobasis Aphragmus Aplectrum Aplodon Apluda Apocynaceae Apocynum Apodanthaceae Apodanthera Apodanthera undulata Aponogeton Aponogetonaceae Aptenia Apteria Aquilegia Aquilegia coerulea Aquilegia formosa Arabidopsis Arabidopsis arenosa Arabidopsis lyrata Arabis Arabis pycnocarpa Araceae Arachniodes Araujia Arbutus Arceuthobium Arceuthobium campylopodum Arceuthobium vaginatum Archidiaceae Archidium Arctagrostis Arctagrostis latifolia Arctanthemum Arctanthemum arcticum Arctium Arctoa Arctomecon Arctophila Arctostaphylos Arctostaphylos bakeri Arctostaphylos canescens Arctostaphylos crustacea Arctostaphylos glandulosa Arctostaphylos hookeri Arctostaphylos manzanita Arctostaphylos mewukka Arctostaphylos montana Arctostaphylos nevadensis Arctostaphylos nummularia Arctostaphylos parryana Arctostaphylos pringlei Arctostaphylos stanfordiana Arctostaphylos tomentosa Arctostaphylos viscida Arctotheca Arctotis Arctous Ardisia Area Arecaceae Arecaceae (tribe Areceae) subtribe Dypsidinae Arecaceae (tribe Areceae) subtribe Ptychospermatinae Arecaceae (tribe Areceae) subtribe Roystoneinae Arecaceae (tribe Cocoeae) subtribe Bactridinae Arecaceae (tribe Cocoeae) subtribe Butiinae Arecaceae (tribe Cocoeae) subtribe Elaeidinae Arecaceae (tribe Corypheae) subtribe Livistoninae Arecaceae (tribe Corypheae) subtribe Sabalinae Arecaceae (tribe Corypheae) subtribe Thrinacinae Arecaceae subfam. Arecoideae Arecaceae subfam. Ceroxyloideae Arecaceae subfam. Coryphoideae Arecaceae tribe Areceae Arecaceae tribe Caryoteae Arecaceae tribe Cocoeae Arecaceae tribe Corypheae Arecaceae tribe Cyclospatheae Arecaceae tribe Hyophorbeae Arecaceae tribe Phoeniceae Arenaria Arenaria lanuginosa Arenaria serpyllifolia Arethusa Argemone Argemone albiflora Argemone corymbosa Argemone munita Argemone pleiacantha Argemone squarrosa Argyranthemum Argyreia Argyrochosma Argyrochosma limitanea Argythamnia Argythamnia brandegeei Argythamnia mercurialina Arida Ariocarpus Ariocarpus fissuratus Arisaema Aristida Aristida californica Aristida dichotoma Aristida longespica Aristida purpurascens Aristida purpurea Aristida ternipes Aristocapsa Aristolochia Aristolochiaceae Arivela Armeria Armeria maritima Armoracia Arnica Arnica angustifolia Arnica griscomii Arnica lanceolata Arnoglossum Arnoseris Aronia Arrangement Arrhenatherum Arrhenopterum Artemisia Artemisia arbuscula Artemisia borealis Artemisia campestris Artemisia cana Artemisia globularia Artemisia laciniata Artemisia ludoviciana Artemisia norvegica Artemisia subg. Absinthium Artemisia subg. Artemisia Artemisia subg. Drancunculus Artemisia subg. Tridentatae Artemisia tridentata Artemisia tripartita Arthraxon Arthrocnemum Aruncus Aruncus dioicus Arundinaria Arundo Asanthus Asarum Aschisma Asclepias Asclepias asperula Asclepias californica Asclepias cryptoceras Asclepias incarnata Asclepias tuberosa Asemeia Asimina Asimina longifolia Asparagus Asphodelus Aspicarpa Aspidotis Aspleniaceae Asplenium Asplenium scolopendrium Asplenium trichomanes Aster Aster alpinus Asteraceae Asteraceae (tribe Heliantheae) subtribe Ambrosiinae Asteraceae (tribe Heliantheae) subtribe Baeriinae Asteraceae (tribe Heliantheae) subtribe Chaenactidinae Asteraceae (tribe Heliantheae) subtribe Clappiinae Asteraceae (tribe Heliantheae) subtribe Coreopsidinae Asteraceae (tribe Heliantheae) subtribe Dimeresiinae Asteraceae (tribe Heliantheae) subtribe Ecliptinae Asteraceae (tribe Heliantheae) subtribe Flaveriinae Asteraceae (tribe Heliantheae) subtribe Gaillardiinae Asteraceae (tribe Heliantheae) subtribe Galinsoginae Asteraceae (tribe Heliantheae) subtribe Guardiolinae Asteraceae (tribe Heliantheae) subtribe Helianthinae Asteraceae (tribe Heliantheae) subtribe Hymenopappinae Asteraceae (tribe Heliantheae) subtribe Jaumeinae Asteraceae (tribe Heliantheae) subtribe Madiinae Asteraceae (tribe Heliantheae) subtribe Marshalliinae Asteraceae (tribe Heliantheae) subtribe Melampodiinae Asteraceae (tribe Heliantheae) subtribe Milleriinae Asteraceae (tribe Heliantheae) subtribe Pectidinae Asteraceae (tribe Heliantheae) subtribe Peritylinae Asteraceae (tribe Heliantheae) subtribe Polymniinae Asteraceae (tribe Heliantheae) subtribe Rudbeckiinae Asteraceae (tribe Heliantheae) subtribe Varillinae Asteraceae (tribe Heliantheae) subtribe Zaluzaniinae Asteraceae tribe Anthemideae Asteraceae tribe Arctotideae Asteraceae tribe Astereae Asteraceae tribe Calenduleae Asteraceae tribe Cardueae Asteraceae tribe Cichorieae Asteraceae tribe Eupatorieae Asteraceae tribe Gnaphalieae Asteraceae tribe Heliantheae Asteraceae tribe Inuleae Asteraceae tribe Mutisieae Asteraceae tribe Plucheeae Asteraceae tribe Senecioneae Asteraceae tribe Vernonieae Astilbe Astraea Astranthium Astrolepis Astrolepis cochisensis Astrolepis sinuata Astrophytum Atamisquea Athyrium Athyrium alpestre Athyrium distentifolium Athyrium filix-femina Athysanus Atrichoseris Atrichum Atriplex Atriplex acanthocarpa Atriplex argentea Atriplex canescens Atriplex cordulata Atriplex coronata Atriplex elegans Atriplex gardneri Atriplex garrettii Atriplex glabriuscula Atriplex gmelinii Atriplex parishii Atriplex powellii Atriplex saccaria Atriplex sect. Atriplex Atriplex sect. Covilleiae Atriplex sect. Dialysex Atriplex sect. Endolepis Atriplex sect. Obione Atriplex sect. Phyllostegiae Atriplex sect. Pleianthae Atriplex sect. Sclerocalymma Atriplex sect. Semibaccata Atriplex sect. Spongiocarpus Atriplex sect. Teutliopsis Atriplex serenana Atriplex subg. Atriplex Atriplex subg. Obione Atriplex subg. Pterochiton Atriplex subsect. Arenariae Atriplex subsect. Argenteae Atriplex subsect. Californicae Atriplex subsect. Graciliflorae Atriplex subsect. Leucophyllae Atriplex subsect. Pusillae Atriplex subsect. Saccariae Atriplex subsect. Truncatae Atriplex subsect. Wolfianae Atriplex torreyi Atriplex wolfii Atropa Aubrieta Aucuba Aulacomniaceae Aulacomnium Aureolaria Aurinia Austrostipa Avena Avenula Axonopus Axyris Ayenia Azolla Azollaceae Baccharis Baccharis pilularis Baccharis plummerae Bacopa Bahia Bahiopsis Baileya Balduina Balsamorhiza Balsamorhiza subg. Artorhiza Balsamorhiza subg. Balsamorhiza Bambusa Barbarea Barbella Barbula Barbula convoluta Barbula indica Barkleyanthus Bartlettia Bartonia Bartonia paniculata Bartramia Bartramiaceae Bartramiopsis Bartsia Basellaceae Basiphyllaea Bassia Bastardia Bataceae Batesimalva Batis Bebbia Bebbia juncea Beckmannia Begonia Begoniaceae Bejaria Belamcanda Bellardia Bellibarbula Bellis Beloglottis Benitoa Bensoniella Berberidaceae Berberis Berberis pinnata Berchemia Bergerocactus Bergia Berlandiera Bernardia Berteroa Bestia Beta Beta vulgaris Betula Betula nana Betula pubescens Betulaceae Betulaceae subfam. Betuloideae Betulaceae subfam. Coryloideae Bidens Bigelowia Bigelowia nudata Billieturnera Bischofia Bistorta Blechnaceae Blechnum Blechnum occidentale Blennosperma Blennosperma nanum Blepharidachne Blepharipappus Blepharizonia Blepharoneuron Bletia Blindia Bloomeria Bloomeria crocea Blutaparon Blysmopsis Blyxa Boechera Boechera breweri Boechera fernaldiana Boehmeria Boerhavia Boerhavia coulteri Bolandra Bolboschoenus Bolboschoenus maritimus Boltonia Boltonia asteroides Boltonia diffusa Bommeria Bonamia Bonellia Bonellia macrocarpa Bontia Borrichia Boschniakia Bothriochloa Botrychium Botrychium lanceolatum Botrychium sect. Hiemobotrychium Botrychium sect. Sceptridium Botrychium subg. Botrychium Botrychium subg. Osmundopteris Botrychium subg. Sceptridium Bouchetia Bouteloua Bouteloua aristidoides Bouteloua barbata Bouteloua curtipendula Bouteloua hirsuta Bouteloua subg. Bouteloua Bouteloua subg. Chondrosum Bouteloua trifida Boykinia Brachelyma Brachychiton Brachydontium Brachyelytrum Brachymenium Brachypodium Brachystigma Brachytheciaceae Brachytheciastrum Brachytheciastrum velutinum Brachythecium Brachythecium erythrorrhizon Bradburia Brandegea Brasenia Brassia Brassica Brassicaceae Brassicaceae tribe Alysseae Brassicaceae tribe Anchonieae Brassicaceae tribe Aphragmeae Brassicaceae tribe Arabideae Brassicaceae tribe Boechereae Brassicaceae tribe Brassiceae Brassicaceae tribe Buniadeae Brassicaceae tribe Calepineae Brassicaceae tribe Camelineae Brassicaceae tribe Cardamineae Brassicaceae tribe Chorisporeae Brassicaceae tribe Cochlearieae Brassicaceae tribe Conringieae Brassicaceae tribe Descurainieae Brassicaceae tribe Erysimeae Brassicaceae tribe Euclidieae Brassicaceae tribe Eutremeae Brassicaceae tribe Halimolobeae Brassicaceae tribe Hesperideae Brassicaceae tribe Iberideae Brassicaceae tribe Isatideae Brassicaceae tribe Lepidieae Brassicaceae tribe Lunarieae Brassicaceae tribe Malcolmieae Brassicaceae tribe Noccaeeae Brassicaceae tribe Physarieae Brassicaceae tribe Sisymbrieae Brassicaceae tribe Smelowskieae Brassicaceae tribe Thelypodieae Brassicaceae tribe Thlaspideae Braunia Braya Braya glabella Braya humilis Braya thorild-wulffii Breynia Brickellia Brickellia atractyloides Brickellia coulteri Brickellia eupatorioides Brickellia hinckleyi Brickellia lemmonii Brickellia longifolia Brickellia microphylla Brickellia oblongifolia Brickelliastrum Brintonia Briza Brodiaea Brodiaea californica Brodiaea coronaria Brodiaea elegans Brodiaea terrestris Bromeliaceae Bromidium Bromus Bromus carinatus Bromus catharticus Bromus hordeaceus Bromus pumpellianus Bromus sect. Bromopsis Bromus sect. Bromus Bromus sect. Ceratochloa Bromus sect. Genea Bromus sect. Neobromus Brosimum Brothera Brotherella Broussonetia Browallia Bruchia Bruchiaceae Brunnichia Bryaceae Bryhnia Bryoandersonia Bryobrittonia Bryocrumia Bryoerythrophyllum Bryolawtonia Bryonia Bryophyllum Bryophyta Bryoxiphiaceae Bryoxiphium Bryum Bryum argenteum Buchloë Buchnera Buckiella Bucklandiella Bucklandiella macounii Bucklandiella sect. Laevifoliae Bucklandiella sect. Lawtonia Bucklandiella sect. Marginatae Bucklandiella sect. Sudeticae Buckleya Buddleja Buddleja racemosa Bulbophyllum Bulbostylis Bulbostylis ciliatifolia Bunias Burmannia Burmanniaceae Butomaceae Butomus Buxaceae Buxbaumia Buxbaumiaceae Buxus Byrsonima Cabomba Cabombaceae Cacaliopsis Cactaceae Cactaceae subfam. Cactoideae Cactaceae subfam. Opuntioideae Cactaceae subfam. Pereskioideae Cakile Cakile edentula Cakile lanceolata Cakile maritima Calamagrostis Calamagrostis canadensis Calamagrostis porteri Calamagrostis stricta Calamovilfa Calamovilfa longifolia Calandrinia Calendula Calepina Calibrachoa Calla Callaeum Callicladium Callicostella Calliergon Calliergonaceae Calliergonella Calliphysalis Callirhoë Callirhoë involucrata Callisia Callitriche Callitriche brutia Callitris Calluna Calocedrus Calochortus Calochortus clavatus Calochortus elegans Calochortus gunnisonii Calochortus kennedyi Calochortus longebarbatus Calochortus macrocarpus Calochortus palmeri Calochortus weedii Calophyllaceae Calophyllum Calopogon Calopogon tuberosus Caltha Calycadenia Calycanthaceae Calycanthus Calycanthus floridus Calycocarpum Calycoseris Calydorea Calymperaceae Calymperes Calypso Calypso bulbosa Calyptocarpus Calyptranthes Calystegia Calystegia atriplicifolia Calystegia catesbeiana Calystegia collina Calystegia macrostegia Calystegia malacophylla Calystegia occidentalis Calystegia purpurata Calystegia sepium Calystegia silvatica Calystegia spithamaea Calystegia subacaulis Camassia Camassia leichtlinii Camassia quamash Camelina Camissonia Camissonia campestris Camissonia kernensis Camissonia sierrae Camissoniopsis Camissoniopsis cheiranthifolia Camissoniopsis guadalupensis Camissoniopsis pallida Campyliadelphus Campylium Campylocentrum Campyloneurum Campylophyllum Campylopodiella Campylopus Campylopus atrovirens Campylostelium Canadanthus Canbya Canella Canellaceae Canna Cannabaceae Cannabis Cannaceae Canotia Caperonia Capparaceae Capraria Capsella Capsicum Capsicum annuum Cardamine Cardionema Carduus Carduus acanthoides Carduus pycnocephalus Carex Carex albicans Carex aquatilis Carex atlantica Carex bigelowii Carex bromoides Carex brunnescens Carex canescens Carex communis Carex crinita Carex debilis Carex deflexa Carex deweyana Carex digitalis Carex divulsa Carex echinata Carex filifolia Carex fissa Carex glareosa Carex inops Carex laxiculmis Carex lenticularis Carex lucorum Carex luzulina Carex magellanica Carex microchaeta Carex microglochin Carex muehlenbergii Carex muricata Carex parallela Carex petricosa Carex scirpoidea Carex scoparia Carex scopulorum Carex sect. Acrocystis Carex sect. Albae Carex sect. Ammoglochin Carex sect. Anomalae Carex sect. Aulocystis Carex sect. Bicolores Carex sect. Capituligerae Carex sect. Carex Carex sect. Careyanae Carex sect. Ceratocystis Carex sect. Chlorostachyae Carex sect. Chordorrhizae Carex sect. Circinatae Carex sect. Clandestinae Carex sect. Collinsiae Carex sect. Cyperoideae Carex sect. Deweyanae Carex sect. Dispermae Carex sect. Divisae Carex sect. Dornera Carex sect. Filifoliae Carex sect. Firmiculmes Carex sect. Foetidae Carex sect. Glareosae Carex sect. Glaucescentes Carex sect. Granulares Carex sect. Griseae Carex sect. Hallerianae Carex sect. Heleoglochin Carex sect. Hirtifoliae Carex sect. Hispidae Carex sect. Holarrhenae Carex sect. Hymenochlaenae Carex sect. Inflatae Carex sect. Lamprochlaenae Carex sect. Laxiflorae Carex sect. Leptocephalae Carex sect. Leucoglochin Carex sect. Limosae Carex sect. Longicaules Carex sect. Lupulinae Carex sect. Macrocephalae Carex sect. Mitratae Carex sect. Multiflorae Carex sect. Nardinae Carex sect. Obtusatae Carex sect. Ovales Carex sect. Paludosae Carex sect. Paniceae Carex sect. Phacocystis Carex sect. Phaestoglochin Carex sect. Phyllostachyae Carex sect. Physoglochin Carex sect. Pictae Carex sect. Porocystis Carex sect. Racemosae Carex sect. Rhynchocystis Carex sect. Rostrales Carex sect. Rupestres Carex sect. Schiedeanae Carex sect. Scirpinae Carex sect. Scitae Carex sect. Shortianae Carex sect. Spirostachyae Carex sect. Squarrosae Carex sect. Stellulatae Carex sect. Thuringiaca Carex sect. Triquetrae Carex sect. Vesicariae Carex sect. Vulpinae Carex stipata Carex supina Carex tenera Carex tonsa Carex tribuloides Carex viridula Carica Caricaceae Carissa Carlina Carlina vulgaris Carlquistia Carminatia Carnegiea Carpenteria Carphephorus Carphephorus odoratissimus Carphochaete Carpinus Carpinus caroliniana Carpobrotus Carrichtera Carsonia Carthamus Carya Carya ovata Caryophyllaceae Caryophyllaceae subfam. Alsinoideae Caryophyllaceae subfam. Caryophylloideae Caryophyllaceae subfam. Paronychioideae Caryophyllaceae subfam. Polycarpoideae Caryota Cascadia Cassiope Cassiope mertensiana Cassiope tetragona Cassytha Castanea Castilleja Castilleja affinis Castilleja ambigua Castilleja angustifolia Castilleja applegatei Castilleja campestris Castilleja densiflora Castilleja exserta Castilleja flava Castilleja hispida Castilleja martini Castilleja miniata Castilleja minor Castilleja pallescens Castilleja pallida Castilleja parviflora Castilleja pilosa Castilleja rubicundula Castilleja scabrida Castilleja subinclusa Castilleja tenuiflora Casuarina Casuarina cunninghamiana Casuarina equisetifolia Casuarinaceae Catabrosa Catharanthus Cathestecum Catopsis Catoscopiaceae Catoscopium Caulanthus Caulophyllum Causonis Cayaponia Ceanothus Ceanothus crassifolius Ceanothus cuneatus Ceanothus foliosus Ceanothus gloriosus Ceanothus impressus Ceanothus jepsonii Ceanothus megacarpus Ceanothus oliganthus Ceanothus prostratus Ceanothus subg. Ceanothus Ceanothus subg. Cerastes Ceanothus tomentosus Ceanothus velutinus Celastraceae Celastrus Celosia Celtica Celtis Cenchrus Centaurea Centaurea stoebe Centaurea virgata Centaurium Centratherum Centromadia Centromadia parryi Centromadia pungens Centrostegia Cephalanthera Cerastium Cerastium alpinum Cerastium arvense Cerastium fontanum Cerastium nutans Cerastium velutinum Ceratiola Ceratodon Ceratodon purpureus Ceratophyllaceae Ceratophyllum Ceratophyllum muricatum Ceratopteris Ceratotheca Cercocarpus Cercocarpus betuloides Cercocarpus ledifolius Cervantesiaceae Cestrum Cevallia Chaenactis Chaenactis carphoclinia Chaenactis douglasii Chaenactis glabriuscula Chaenactis sect. Acarphaea Chaenactis sect. Chaenactis Chaenactis sect. Macrocarphus Chaenomeles Chaenorhinum Chaenorhinum minus Chaetadelpha Chaetopappa Chaetopappa asteroides Chamaebatia Chamaebatiaria Chamaechaenactis Chamaecyparis Chamaedaphne Chamaedorea Chamaelirium Chamaemelum Chamaenerion Chamaenerion angustifolium Chamaerhodos Chamaesaracha Chamelaucium Chaptalia Chasmanthe Chasmanthium Cheilanthes Cheiroglossa Chelidonium Chelone Chelone obliqua Chenia Chenopodiaceae Chenopodium Chenopodium berlandieri Chenopodium capitatum Chenopodium glaucum Chenopodium incanum Chenopodium polyspermum Chenopodium rubrum Chenopodium sect. Agathophytum Chenopodium sect. Blitum Chenopodium sect. Chenopodium Chenopodium sect. Degenia Chenopodium sect. Glauca Chenopodium sect. Grossefoveata Chenopodium sect. Pseudoblitum Chenopodium subg. Blitum Chenopodium subg. Chenopodium Chenopodium subsect. Chenopodium Chenopodium subsect. Favosa Chenopodium subsect. Fremontia Chenopodium subsect. Leptophylla Chenopodium subsect. Polysperma Chenopodium subsect. Standleyana Chenopodium subsect. Undata Chenopodium subsect. Urbica Chimaphila Chimaphila umbellata Chionodoxa Chionophila Chloracantha Chloracantha spinosa Chloris Chloris canterae Chlorocrambe Chlorogalum Chlorogalum pomeridianum Chlorogalum purpureum Chloropyron Chloropyron maritimum Chloropyron molle Chondrilla Chorisiva Chorispora Chorizanthe Chorizanthe biloba Chorizanthe brevicornu Chorizanthe cuspidata Chorizanthe fimbriata Chorizanthe parryi Chorizanthe polygonoides Chorizanthe pungens Chorizanthe robusta Chorizanthe sect. Acanthogonum Chorizanthe sect. Fragile Chorizanthe sect. Ptelosepala Chorizanthe subg. Amphietes Chorizanthe subg. Eriogonella Chorizanthe subg. Quintaria Chorizanthe xanti Chromolaena Chrysactinia Chrysanthemoides Chryso-hypnum Chrysobalanaceae Chrysobalanus Chrysobalanus icaco Chrysogonum Chrysogonum virginianum Chrysolepis Chrysolepis chrysophylla Chrysoma Chrysophyllum Chrysophyllum oliviforme Chrysopogon Chrysopsis Chrysopsis gossypina Chrysopsis linearifolia Chrysosplenium Chrysothamnus Chrysothamnus viscidiflorus Chylismia Chylismia brevipes Chylismia cardiophylla Chylismia claviformis Chylismia scapoidea Chylismia sect. Chylismia Chylismia sect. Lignothera Chylismia specicola Chylismia walkeri Chylismiella Cicendia Cichorium Cienfuegosia Cimicifuga Cinclidium Cinna Cinnamomum Circaea Circaea alpina Circaea canadensis Cirriphyllum Cirsium Cirsium arizonicum Cirsium clavatum Cirsium cymosum Cirsium douglasii Cirsium eatonii Cirsium edule Cirsium fontinale Cirsium horridulum Cirsium hydrophilum Cirsium inamoenum Cirsium occidentale Cirsium ochrocentrum Cirsium pulcherrimum Cirsium pumilum Cirsium remotifolium Cirsium scariosum Cissampelos Cissus Cistaceae Cistanthe Cistus Citrullus Citrullus lanatus Cladanthus Cladium Cladoraphis Claopodium Clappia Clarkia Clarkia amoena Clarkia biloba Clarkia borealis Clarkia concinna Clarkia cylindrica Clarkia gracilis Clarkia mildrediae Clarkia purpurea Clarkia sect. Biortis Clarkia sect. Clarkia Clarkia sect. Eucharidium Clarkia sect. Fibula Clarkia sect. Godetia Clarkia sect. Myxocarpa Clarkia sect. Phaeostoma Clarkia sect. Rhodanthos Clarkia speciosa Clarkia subsect. Connubium Clarkia subsect. Flexicaules Clarkia subsect. Heterogaura Clarkia subsect. Jugales Clarkia subsect. Lautiflorae Clarkia subsect. Micranthae Clarkia subsect. Phaeostoma Clarkia subsect. Primigenia Clarkia subsect. Prognatae Clarkia subsect. Sympherica Clarkia tembloriensis Clarkia xantiana Clasmatodon Claytonia Claytonia exigua Claytonia parviflora Claytonia perfoliata Claytonia rubra Cleistes Cleistocarpidium Clematis Clematis columbiana Clematis hirsutissima Clematis occidentalis Clematis pitcheri Clematis subg. Atragene Clematis subg. Clematis Clematis subg. Viorna Clematis subg. Viticella Clematis tangutica Cleomaceae Cleome Cleomella Cleomella hillmanii Cleoserrata Clethra Clethraceae Cliftonia Climaciaceae Climacium Clintonia Clusia Clusiaceae Cnidoscolus Coccinia Coccoloba Coccothrinax Cocculus Cochlearia Cochlospermaceae Cocos Codriophorus Codriophorus sect. Codriophorus Codriophorus sect. Fascicularia Coeloglossum Coelophragmus Coelorachis Coincya Coincya monensis Coix Coleanthus Coleogyne Collinsia Collinsia bartsiifolia Collinsia heterophylla Collinsia sparsiflora Colocasia Coloration Colubrina Colubrina asiatica Colubrina cubensis Columbiadoria Comandra Comandra umbellata Comandraceae Comarostaphylis Comarostaphylis diversifolia Comarum Comastoma Combretaceae Combretum Commelina Commelina diffusa Commelinaceae Commicarpus Comptonia Conardia Condalia Condalia globosa Condalia warnockii Condition Conicosia Coniferophyta Conimitella Conocarpus Conoclinium Conoclinium betonicifolium Conopholis Conostomum Conringia Consolea Consolida Constancea Convallaria Convallaria majalis Convolvulaceae Convolvulus Convolvulus crenatifolius Conyza Coptis Corallorhiza Corallorhiza maculata Corallorhiza odontorhiza Corallorhiza striata Corchorus Cordylanthus Cordylanthus eremicus Cordylanthus kingii Cordylanthus pilosus Cordylanthus rigidus Cordylanthus tenuis Cordylanthus wrightii Corema Coreocarpus Coreopsis Coreopsis sect. Calliopsis Coreopsis sect. Coreopsis Coreopsis sect. Eublepharis Coreopsis sect. Gyrophyllum Coreopsis sect. Leptosyne Coreopsis sect. Pugiopappus Coreopsis sect. Silphidium Coreopsis sect. Tuckermannia Corethrogyne Corispermum Corispermum americanum Corispermum hookeri Corispermum ochotense Cornaceae Cornus Cornus subg. Arctocrania Cornus subg. Cornus Cornus subg. Cynoxylon Cornus subg. Mesomora Cornus subg. Syncarpea Cornus subg. Thelycrania Corrigiola Corrigiola litoralis Cortaderia Corydalis Corydalis aurea Corydalis caseana Corydalis curvisiliqua Corydalis micrantha Corylus Corylus cornuta Corynephorus Coryphantha Coscinodon Cosmos Cota Cotoneaster Cottea Cottsia Cotula Cotyledon Cotyledon orbiculata Count Crambe Cranichis Crassula Crassula colligata Crassulaceae Crataegus Crataegus (sect. Brevispinae) ser. Brevispinae Crataegus (sect. Coccineae) ser. Aestivales Crataegus (sect. Coccineae) ser. Apricae Crataegus (sect. Coccineae) ser. Bracteatae Crataegus (sect. Coccineae) ser. Coccineae Crataegus (sect. Coccineae) ser. Crus-galli Crataegus (sect. Coccineae) ser. Dilatatae Crataegus (sect. Coccineae) ser. Greggianae Crataegus (sect. Coccineae) ser. Intricatae Crataegus (sect. Coccineae) ser. Lacrimatae Crataegus (sect. Coccineae) ser. Madrenses Crataegus (sect. Coccineae) ser. Molles Crataegus (sect. Coccineae) ser. Parvifoliae Crataegus (sect. Coccineae) ser. Populneae Crataegus (sect. Coccineae) ser. Pruinosae Crataegus (sect. Coccineae) ser. Pulcherrimae Crataegus (sect. Coccineae) ser. Punctatae Crataegus (sect. Coccineae) ser. Rotundifoliae Crataegus (sect. Coccineae) ser. Tenuifoliae Crataegus (sect. Coccineae) ser. Triflorae Crataegus (sect. Coccineae) ser. Virides Crataegus (sect. Crataegus) ser. Apiifoliae Crataegus (sect. Crataegus) ser. Cordatae Crataegus (sect. Crataegus) ser. Crataegus Crataegus (sect. Crataegus) ser. Microcarpae Crataegus (sect. Douglasia) ser. Cerrones Crataegus (sect. Douglasia) ser. Douglasianae Crataegus (sect. Douglasia) ser. Purpureofructus Crataegus (sect. Macracanthae) ser. Anomalae Crataegus (sect. Macracanthae) ser. Macracanthae Crataegus (sect. Sanguineae) ser. Altaicae Crataegus (sect. Unassigned) ser. Montaninsulae Crataegus berberifolia Crataegus chrysocarpa Crataegus coccinea Crataegus collina Crataegus crus-galli Crataegus margarettae Crataegus mollis Crataegus monogyna Crataegus okanaganensis Crataegus ouachitensis Crataegus padifolia Crataegus pruinosa Crataegus reverchonii Crataegus scabrida Crataegus schuettei Crataegus sect. Brevispinae Crataegus sect. Coccineae Crataegus sect. Crataegus Crataegus sect. Douglasia Crataegus sect. Macracanthae Crataegus sect. Sanguineae Crataegus sect. Unassigned Crataegus sheila-phippsiae Crataegus succulenta Crataegus texana Crataegus viridis Crataegus wattiana Crataegus ×sicca Cratoneuron Crepis Crepis bakeri Crepis modocensis Crepis occidentalis Crepis runcinata Cressa Crinum Crinum americanum Crocanthemum Crocanthemum scoparium Crocidium Crocosmia Croomia Croptilon Croptilon hookerianum Crossidium Crossidium crassinervium Crossidium squamiferum Crossopetalum Crossosoma Crossosomataceae Croton Croton alabamensis Croton glandulosus Croton leucophyllus Croton lindheimerianus Croton michauxii Croton pottsii Crumia Crupina Cryphaea Cryphaeaceae Crypsis Cryptogramma Cryptostegia Ctenidium Ctenitis Ctenium Ctenolepis Cucumis Cucumis anguria Cucumis melo Cucumis sativus Cucurbita Cucurbita melopepo Cucurbita melopepo subsp. melopepo Cucurbita melopepo subsp. texana Cucurbita okeechobeensis Cucurbita pepo Cucurbitaceae Cuniculotinus Cuphea Cupressaceae Cupressus Cupressus guadalupensis Curcuma Cuscuta Cuscuta approximata Cuscuta californica Cuscuta chinensis Cuscuta epithymum Cuscuta gronovii Cuscuta indecora Cuscuta japonica Cuscuta obtusiflora Cuscuta pacifica Cuscuta subg. Cuscuta Cuscuta subg. Grammica Cuscuta subg. Monogynella Cuscuta umbellata Cusickiella Cutandia Cyanthillium Cycadophyta Cyclachaena Cycladenia Cycladenia humilis Cyclanthera Cyclodictyon Cycloloma Cyclopogon Cydonia Cylindropuntia Cylindropuntia acanthocarpa Cylindropuntia bigelovii Cylindropuntia californica Cylindropuntia fulgida Cylindropuntia imbricata Cymbalaria Cymbalaria muralis Cymbopogon Cymodoceaceae Cymophyllus Cynanchum Cynara Cynara cardunculus Cynodon Cynodon dactylon Cynodontium Cynophalla Cynosurus Cyperaceae Cyperus Cyperus esculentus Cyperus lupulinus Cyperus manimae Cyperus subg. Cyperus Cyperus subg. Diclidium Cyperus subg. Juncellus Cyperus subg. Pycnostachys Cyperus subg. Pycreus Cyphomeris Cypripedium Cypripedium parviflorum Cypselea Cyrilla Cyrillaceae Cyrto-hypnum Cyrtomium Cyrtomium fortunei Cyrtomnium Cyrtopodium Cystopteris Dacryophyllum Dactylis Dactyloctenium Dactylorhiza Dactylorhiza majalis Dalechampia Daltonia Daltoniaceae Damasonium Danthonia Daphne Darlingtonia Darmera Dasiphora Dasistoma Dasylirion Dasyochloa Dasypyrum Datisca Datiscaceae Datura Decodon Decumaria Dedeckera Deeringothamnus Deinandra Deinandra increscens Deiregyne Delairea Delosperma Delphinium Delphinium bicolor Delphinium californicum Delphinium carolinianum Delphinium decorum Delphinium gypsophilum Delphinium hansenii Delphinium hesperium Delphinium menziesii Delphinium nuttallii Delphinium parishii Delphinium parryi Delphinium patens Delphinium sect. Diedropetala Delphinium sect. Elatopsis Delphinium subsect. Bicoloria Delphinium subsect. Depauperata Delphinium subsect. Echinata Delphinium subsect. Elata Delphinium subsect. Exaltata Delphinium subsect. Grumosa Delphinium subsect. Multiplex Delphinium subsect. Subscaposa Delphinium subsect. Virescens Delphinium subsect. Wislizenana Delphinium variegatum Dendroalsia Dendromecon Dendrophylax Dennstaedtia Dennstaedtiaceae Deparia Deschampsia Deschampsia cespitosa Descurainia Descurainia incisa Descurainia pinnata Desmazeria Deutzia Diameter Diamorpha Dianella Dianthus Dianthus armeria Dianthus barbatus Dianthus deltoides Dianthus plumarius Diapensia Diapensiaceae Diaperia Diaperia prolifera Diaperia verna Diarrhena Dicentra Dicentra formosa Dichaetophora Dichanthelium Dichanthelium aciculare Dichanthelium acuminatum Dichanthelium chamaelonche Dichanthelium commutatum Dichanthelium dichotomum Dichanthelium ensifolium Dichanthelium oligosanthes Dichanthelium ovale Dichanthelium portoricense Dichanthelium sect. Angustifolia Dichanthelium sect. Clandestina Dichanthelium sect. Dichanthelium Dichanthelium sect. Ensifolia Dichanthelium sect. Lancearia Dichanthelium sect. Lanuginosa Dichanthelium sect. Linearifolia Dichanthelium sect. Macrocarpa Dichanthelium sect. Nudicaulia Dichanthelium sect. Oligosantha Dichanthelium sect. Pedicellata Dichanthelium sect. Sphaerocarpa Dichanthelium sect. Strigosa Dichanthelium strigosum Dichanthium Dichelostemma Dichelostemma capitatum Dichelyma Dichodontium Dichondra Dichromanthus Dicoria Dicranaceae Dicranella Dicranocarpus Dicranodontium Dicranopteris Dicranostegia Dicranoweisia Dicranum Dicranum fuscescens Dicranum majus Didiplis Didymodon Didymodon rigidulus Didymodon vinealis Dieteria Dieteria asteroides Dieteria bigelovii Dieteria canescens Digitalis Digitalis purpurea Digitaria Digitaria eriantha Digitaria filiformis Dimeresia Dimorphocarpa Dimorphotheca Dinebra Dionaea Dioscorea Dioscoreaceae Diospyros Diphasiastrum Diphylleia Diphysciaceae Diphyscium Diplacus Diplacus bigelovii Diplazium Diplotaxis Dirca Disceliaceae Discelium Dissanthelium Distance Distichium Distichlis Dithyrea Ditrichaceae Ditrichum Ditrysinia Dittrichia Dodecahema Dodecatheon Dodecatheon clevelandii Dodecatheon conjugens Dodecatheon pulchellum Doellingeria Doellingeria umbellata Donnellia Donrichardsia Dopatrium Doronicum Dorstenia Douglasia Draba Draba asprella Draba cuneifolia Drepanocladus Drosanthemum Drosera Droseraceae Drummondia Dryas Dryas ajanensis Dryas integrifolia Drymaria Drymaria cordata Drymaria effusa Drymaria glandulosa Drymaria leptophylla Drymocallis Drymocallis cuneifolia Drymocallis glandulosa Drymocallis lactea Drymocallis pseudorupestris Dryopetalon Dryopteridaceae Dryopteris Drypetes Duchesnea Duchesnea indica Dudleya Dudleya abramsii Dudleya attenuata Dudleya blochmaniae Dudleya cymosa Dudleya saxosa Dudleya subg. Dudleya Dudleya subg. Hasseanthus Dudleya subg. Stylophyllum Dudleya virens Dulichium Dulichium arundinaceum Dupontia Dypsis Dysodiopsis Dysphania Dysphania sect. Adenois Dysphania sect. Botryoides Dysphania sect. Orthospora Dysphania subsect. Botrys Dysphania subsect. Incisa Dysphania subsect. Teloxys Dyssodia Eastwoodia Eatonella Ebenaceae Ecballium Eccremidium Echeandia Echeveria Echinacea Echinacea paradoxa Echinocactus Echinocactus polycephalus Echinocereus Echinocereus enneacanthus Echinocereus pectinatus Echinocereus rigidissimus Echinocereus stramineus Echinochloa Echinochloa crus-pavonis Echinochloa muricata Echinocystis Echinodorus Echinodorus cordifolius Echinomastus Echinomastus erectocentrus Echinomastus intertextus Echinopepon Echinophyllum Echinops Echinops ritro Echites Eclipta Edgeworthia Egeria Egletes Ehrharta Eichhornia Elaeagnaceae Elaeagnus Elaeis Elatinaceae Elatine Eleocharis Eleocharis (sect. Eleocharis) ser. Albidae Eleocharis (sect. Eleocharis) ser. Eleocharis Eleocharis (sect. Eleocharis) ser. Melanocarpae Eleocharis (sect. Eleocharis) ser. Rostellatae Eleocharis (sect. Eleocharis) ser. Tenuissimae Eleocharis (sect. Eleogenus) ser. Maculosae Eleocharis (sect. Eleogenus) ser. Ovatae Eleocharis compressa Eleocharis flavescens Eleocharis mamillata Eleocharis microcarpa Eleocharis sect. Eleocharis Eleocharis sect. Eleogenus Eleocharis sect. Parvulae Eleocharis subg. Eleocharis Eleocharis subg. Limnochloa Eleocharis subg. Scirpidium Eleocharis subg. Zinserlingia Eleocharis tenuis Elephantopus Eleusine Eleusine coracana Elionurus Elliottia Elmera Elodea Elodium Eltroplectris Elymus Elymus alaskanus Elymus canadensis Elymus elymoides Elymus glaucus Elymus lanceolatus Elymus stebbinsii Elymus trachycaulus Elymus virginicus Embryophyta Emex Emilia Emorya Empetrum Encalypta Encalyptaceae Encelia Enceliopsis Encyclia Enemion Engelmannia Enneapogon Enteropogon Entodon Entodontaceae Entodontopsis Entosthodon Ephedra Ephedraceae Ephemeraceae Ephemerum Ephemerum crassinervium Epidendrum Epifagus Epigaea Epilobium Epilobium canum Epilobium ciliatum Epilobium glaberrimum Epilobium hornemannii Epilobium sect. Cordylophorum Epilobium sect. Crossostigma Epilobium sect. Epilobiopsis Epilobium sect. Epilobium Epilobium sect. Macrocarpa Epilobium sect. Pachydium Epilobium sect. Xerolobium Epilobium sect. Zauschneria Epilobium subsect. Nuttalia Epilobium subsect. Petrolobium Epipactis Epiphyllum Epiphyllum phyllanthus Epipterygium Epithelantha Epithelantha micromeris Epixiphium Equisetaceae Equisetophyta Equisetum Equisetum hyemale Equisetum ramosissimum Equisetum subg. Equisetum Equisetum subg. Hippochaete Equisetum telmateia Equisetum variegatum Eragrostis Eragrostis ciliaris Eragrostis mexicana Eragrostis pectinacea Eragrostis pilosa Eranthis Erechtites Erechtites hieraciifolius Eremalche Eremalche parryi Eremochloa Eremocrinum Eremogone Eremogone capillaris Eremogone congesta Eremogone eastwoodiae Eremogone franklinii Eremogone hookeri Eremogone kingii Eremogone macradenia Eremopoa Eremopyrum Eremothera Eremothera boothii Erica Ericaceae Ericaceae subfam. Arbutoideae Ericaceae subfam. Cassiopoideae Ericaceae subfam. Ericoideae Ericaceae subfam. Harrimanelloideae Ericaceae subfam. Monotropoideae Ericaceae subfam. Vaccinioideae Ericameria Ericameria cooperi Ericameria cuneata Ericameria nauseosa Ericameria palmeri Ericameria parishii Ericameria parryi Erigeron Erigeron acris Erigeron aphanactis Erigeron bellidiastrum Erigeron bloomeri Erigeron breweri Erigeron chrysopsidis Erigeron clokeyi Erigeron concinnus Erigeron eatonii Erigeron foliosus Erigeron formosissimus Erigeron glabellus Erigeron glacialis Erigeron inornatus Erigeron lassenianus Erigeron peregrinus Erigeron petrophilus Erigeron philadelphicus Erigeron poliospermus Erigeron pulchellus Erigeron pumilus Erigeron reductus Erigeron sionis Erigeron strigosus Erigeron uncialis Erigeron uniflorus Eriobotrya Eriocaulaceae Eriocaulon Eriochloa Eriochloa acuminata Eriochloa michauxii Eriogonum Eriogonum alatum Eriogonum apricum Eriogonum arcuatum Eriogonum atrorubens Eriogonum baileyi Eriogonum breedlovei Eriogonum brevicaule Eriogonum cithariforme Eriogonum compositum Eriogonum corymbosum Eriogonum deflexum Eriogonum douglasii Eriogonum elatum Eriogonum elongatum Eriogonum esmeraldense Eriogonum fasciculatum Eriogonum flavum Eriogonum giganteum Eriogonum gracile Eriogonum grande Eriogonum heermannii Eriogonum hemipterum Eriogonum heracleoides Eriogonum hoffmannii Eriogonum inerme Eriogonum jamesii Eriogonum kennedyi Eriogonum lachnogynum Eriogonum leptocladon Eriogonum longifolium Eriogonum luteolum Eriogonum marifolium Eriogonum microtheca Eriogonum microthecum Eriogonum multiflorum Eriogonum nudum Eriogonum nutans Eriogonum ochrocephalum Eriogonum ovalifolium Eriogonum panguicense Eriogonum pharnaceoides Eriogonum prattenianum Eriogonum prociduum Eriogonum pyrolifolium Eriogonum rosense Eriogonum spergulinum Eriogonum sphaerocephalum Eriogonum strictum Eriogonum subg. Clastomyelon Eriogonum subg. Eriogonum Eriogonum subg. Eucycla Eriogonum subg. Ganysma Eriogonum subg. Micrantha Eriogonum subg. Oligogonum Eriogonum subg. Oregonium Eriogonum subg. Pterogonum Eriogonum tenellum Eriogonum thompsoniae Eriogonum umbellatum Eriogonum ursinum Eriogonum wrightii Eriogonum zionis Erioneuron Eriophorum Eriophorum angustifolium Eriophyllum Eriophyllum ambiguum Eriophyllum confertiflorum Eriophyllum lanatum Erpodiaceae Erpodium Eruca Eruca vesicaria Erucastrum Erysimum Erysimum capitatum Erythranthe Erythronium Erythronium americanum Erythronium grandiflorum Erythronium umbilicatum Eschscholzia Eschscholzia californica Eschscholzia lemmonii Eubotrys Eucalyptus Eucephalus Eucephalus ledophyllus Euchiton Eucladium Euclidium Eucnide Eucnide bartonioides Eucommia Eucommiaceae Eugenia Eulobus Eulophia Euonymus Euonymus occidentalis Eupatorium Eupatorium album Eupatorium hyssopifolium Eupatorium leucolepis Eupatorium rotundifolium Euphorbia Euphorbia austrotexana Euphorbia chaetocalyx Euphorbia deltoidea Euphorbia geyeri Euphorbia inundata Euphorbia ocellata Euphorbia pediculifera Euphorbia polycarpa Euphorbia sect. Alectoroctonum Euphorbia sect. Anisophyllum Euphorbia sect. Crepidaria Euphorbia sect. Nummulariopsis Euphorbia sect. Poinsettia Euphorbia serpillifolia Euphorbia subg. Esula Euphorbia theriaca Euphorbia tithymaloides Euphorbiaceae Euphrasia Euphrasia arctica Euphrasia oakesii Euphrasia salisburgensis Euphrasia stricta Eurhynchiastrum Eurhynchiastrum pulchellum Eurybia Eustachys Eustoma Eustoma exaltatum Euthamia Eutrema Eutrochium Eutrochium maculatum Eutrochium purpureum Evolvulus Exochorda Exudation Fabronia Fabroniaceae Facelis Fagaceae Fagonia Fagopyrum Fagus Fallopia Fallopia japonica Fallugia Fatoua Fendlera Fendlerella Ferocactus Ferocactus hamatacanthus Ferocactus viridescens Festuca Festuca brachyphylla Festuca californica Festuca rubra Festuca saximontana Festuca sect. Breviaristatae Festuca sect. Elmera Festuca sect. Festuca Festuca sect. Subulatae Festuca sect. Subuliflorae Festuca sect. Texanae Festuca subg. Festuca Festuca subg. Montanae Festuca subg. Obtusae Festuca subg. Subulatae Festuca viviparoidea Ficus Filago Filago pyramidata Filipendula Fimbristylis Fimbristylis puberula Fingerhuthia Firmiana Fissidens Fissidens closteri Fissidens pellucidus Fissidens serratus Fissidentaceae Flacourtia Flaveria Fleischmannia Floerkea Florestina Flourensia Flueggea Flueggea virosa Flyriella Fontinalaceae Fontinalis Forsstroemia Fothergilla Fragaria Fragaria chiloensis Fragaria vesca Fragaria virginiana Frangula Frangula californica Frangula purshiana Frangula rubra Frankenia Frankeniaceae Franklinia Frasera Frasera albicaulis Frasera albomarginata Freesia Fremontodendron Fritillaria Fritillaria biflora Froelichia Fryxellia Fuchsia Fuirena Fuirena simplex Fumaria Fumariaceae Funaria Funaria hygrometrica Funariaceae Funastrum Furcraea Gaillardia Galanthus Galax Galeandra Galearis Galenia Galinsoga Galinsoga parviflora Galphimia Gambelia Gamochaeta Garberia Garrya Garryaceae Gastridium Gaudinia Gaultheria Gaylussacia Gayophytum Gayophytum diffusum Gazania Gelsemiaceae Gelsemium Gemmabryum Gemmabryum sect. Caespitibryum Gemmabryum sect. Gemmabryum Gemmabryum sect. Tuberibryum Gentiana Gentiana affinis Gentiana andrewsii Gentiana newberryi Gentiana prostrata Gentianaceae Gentianella Gentianella amarella Gentianella heterosepala Gentianella propinqua Gentianella quinquefolia Gentianopsis Gentianopsis detonsa Gentianopsis virgata Geocarpon Geocaulon Geraea Geum Geum macrophyllum Geum triflorum Gibasis Gigaspermaceae Gillenia Gilmania Ginkgo Ginkgoaceae Ginkgophyta Gisekia Gladiolus Gladiolus dalenii Glandulicactus Glandulicactus uncinatus Glaucium Glebionis Gleicheniaceae Glinus Globulinella Glochidion Glossopetalon Glossopetalon spinescens Glossostigma Glyceria Glyceria canadensis Glyceria grandis Glyceria sect. Glyceria Glyceria sect. Hydropoa Glyceria sect. Striatae Glyceria septentrionalis Glyptopleura Gnaphalium Gnetophyta Gochnatia Gollania Gomphrena Gonolobus Gonolobus suberosus Goodmania Goodyera Gordonia Gossypianthus Gossypianthus lanuginosus Gossypium Gouania Govenia Grammitidaceae Grammitis Graptopetalum Gratiola Grayia Grevillea Grimmia Grimmia subg. Grimmia Grimmia subg. Guembelia Grimmia subg. Litoneuron Grimmia subg. Rhabdogrimmia Grimmia subg. Undetermined Grimmiaceae Grimmiaceae subfam. Grimmioideae Grimmiaceae subfam. Racomitrioideae Grindelia Grossulariaceae Groutiella Growth form Grusonia Guaiacum Guapira Guardiola Guilleminea Guilleminea densa Guizotia Gundlachia Gunnera Gunneraceae Gutierrezia Gutierrezia texana Guzmania Guzmania monostachia Gyminda Gymnanthes Gymnocarpium Gymnocarpium jessoense Gymnopogon Gymnosperma Gymnosperms Gymnostomiella Gymnostomum Gynandropsis Gynerium Gynura Gypsophila Gyrandra Gyroweisia Habenaria Habranthus Hackelochloa Haemodoraceae Hageniella Hainardia Hakonechloa Halenia Halesia Halimolobos Halodule Halogeton Halophila Haloragaceae Haloragis Haloragis erecta Hamamelidaceae Hamamelis Hamatocactus Hamatocaulis Haplocladium Haplodontium Haplophyton Haploësthes Haploësthes greggii Harmonia Harperocallis Harrimanella Harrisella Harrisia Hartwrightia Hasteola Hastingsia Hazardia Hazardia squarrosa Hazardia whitneyi Hebecarpa Hecastocleis Hechtia Hedosyne Hedwigia Hedwigiaceae Hedychium Hedypnois Height Heimia Helenium Helenium amarum Helenium elegans Helenium microcephalum Helianthella Helianthella californica Helianthus Helianthus debilis Helianthus niveus Helianthus nuttallii Helianthus occidentalis Helianthus pauciflorus Helianthus petiolaris Helianthus praecox Helichrysum Heliconia Heliconiaceae Helictotrichon Heliomeris Heliomeris longifolia Heliomeris multiflora Heliopsis Heliopsis helianthoides Helleborus Helminthotheca Helodiaceae Helonias Hemarthria Hemerocallis Hemiscola Hemiscola aculeata Hemitomes Hemizonella Hemizonia Hemizonia congesta Henicodium Hennediella Hennediella heimii Herbertia Herissantia Hermannia Hermbstaedtia Herniaria Herniaria hirsuta Herpetineuron Herrickia Herrickia glauca Herrickia kingii Herzogiella Hesperaloe Hesperevax Hesperevax acaulis Hesperevax sparsiflora Hesperidanthus Hesperis Hesperocallis Hesperocnide Hesperolinon Hesperomecon Hesperostipa Hesperostipa comata Hesperoyucca Heteranthemis Heteranthera Heterocladium Heteromeles Heterophyllium Heteropogon Heteropterys Heterosavia Heterosperma Heterotheca Heterotheca camporum Heterotheca fulcrata Heterotheca oregona Heterotheca sessiliflora Heterotheca stenophylla Heterotheca subaxillaris Heterotheca villosa Heuchera Heuchera americana Heuchera micrantha Heuchera parviflora Heuchera villosa Hexalectris Hexalectris spicata Hexastylis Hexastylis arifolia Hexastylis shuttleworthii Hibiscus Hibiscus clypeatus Hibiscus moscheutos Hibiscus striatus Hidden categories Hieracium Hilaria Hilaria belangeri Hilpertia Hippeastrum Hippocratea Hippomane Hippophaë Hippuris Hiptage Hirschfeldia Holcus Hollisteria Holmgrenanthe Holocarpha Holocarpha virgata Holodiscus Holodiscus discolor Holodiscus microphyllus Holosteum Holosteum umbellatum Holozonia Homalia Homalia trichomanoides Homaliadelphus Homalotheciella Homalothecium Homomallium Homomallium mexicanum Honckenya Honckenya peploides Hookeria Hookeriaceae Hordeum Hordeum brachyantherum Hordeum jubatum Hordeum marinum Hordeum murinum Horkelia Horkelia californica Horkelia clevelandii Horkelia congesta Horkelia cuneata Horkelia daucifolia Horkelia fusca Horkelia sect. Capitatae Horkelia sect. Hispidulae Horkelia sect. Horkelia Horkelia sect. Parryae Horkelia sect. Tridentatae Horkelia tridentata Horkeliella Hornungia Horsfordia Hosta Hottonia Hovenia Howelliella Hudsonia Hulsea Hulsea vestita Hulteniella Humulus Humulus lupulus Hunzikeria Huperzia Hura Hyacinthoides Hybanthus Hydrangea Hydrangeaceae Hydrastis Hydrilla Hydrocharis Hydrocharitaceae Hydrocleys Hydrolea Hydrolea spinosa Hydroleaceae Hygroamblystegium Hygroamblystegium varium Hygrohypnum Hygroryza Hylocereus Hylocomiaceae Hylocomiastrum Hylocomium Hylotelephium Hymenachne Hymenocallis Hymenocallis henryae Hymenocallis occidentalis Hymenopappus Hymenopappus artemisiifolius Hymenopappus filifolius Hymenopappus flavescens Hymenopappus scabiosaeus Hymenophyllaceae Hymenophyllum Hymenostylium Hymenostylium recurvirostrum Hymenothrix Hymenoxys Hymenoxys ambigens Hymenoxys richardsonii Hyophila Hyophiladelphus Hyoscyamus Hyparrhenia Hypericaceae Hypericum Hypericum ascyron Hypericum hypericoides Hypericum maculatum Hypericum mutilum Hypericum nitidum Hypericum perforatum Hypericum sect. Brathys Hypericum sect. Hypericum Hypericum sect. Myriandra Hypericum sect. Roscyna Hypericum sect. Webbia Hypnaceae Hypnum Hypnum cupressiforme Hypnum revolutum Hypochaeris Hypochaeris microcephala Hypolepis Hypopterygiaceae Hypopterygium Hypoxis Iberis Ibervillea Idahoa Iliamna Illiciaceae Illicium Imbribryum Imperata Imported vocabulary Indusiella Inula Iodanthus Ionactis Ionopsis Ipomoea Ipomoea carnea Ipomoea cordatotriloba Ipomoea pes-caprae Ipomoea plummerae Ipomoea tenuiloba Ipomoea ternifolia Iresine Iridaceae Iris Iris (sect. Limniris) ser. Californicae Iris (sect. Limniris) ser. Hexagonae Iris (sect. Limniris) ser. Laevigatae Iris (sect. Limniris) ser. Longipetalae Iris (sect. Limniris) ser. Prisimaticae Iris (sect. Limniris) ser. Sibirica Iris (sect. Limniris) ser. Spuriae Iris (sect. Limniris) ser. Tripetalae Iris (sect. Limniris) ser. Vernae Iris sect. Limniris Iris sect. Lophiris Iris subg. Iris Iris subg. Limniris Iris verna Isatis Ischaemum Ismelia Isocarpha Isocarpha oppositifolia Isocoma Isocoma acradenia Isocoma menziesii Isolepis Isopterygiopsis Isopterygium Isothecium Isotria Isoëtaceae Isoëtes Itea Iteaceae Iva Ivesia Ivesia aperta Ivesia argyrocoma Ivesia arizonica Ivesia baileyi Ivesia gordonii Ivesia kingii Ivesia lycopodioides Ivesia rhypara Ivesia sect. Comarella Ivesia sect. Ivesia Ivesia sect. Setosae Ivesia sect. Stellariopsis Ivesia sect. Unguiculatae Ivesia shockleyi Iwatsukiella Ixeris Ixophorus Jaborosa Jacquemontia Jacquinia Jaegerina Jaffueliobryum Jaltomata Jamesia Jamesia americana Jamesianthus Jarava Jatropha Jatropha dioica Jaumea Jefea Jeffersonia Jensia Jepsonia Johanneshowellia Jovibarba Juglandaceae Juglans Juglans major Juncaceae Juncaginaceae Juncus Juncus acutus Juncus arcticus Juncus covillei Juncus ensifolius Juncus falcatus Juncus hemiendytus Juncus stygius Juncus subg. Alpini Juncus subg. Ensifolii Juncus subg. Genuini Juncus subg. Graminifolii Juncus subg. Juncus Juncus subg. Poiophylli Juncus subg. Septati Juncus triglumis Juncus validus Juniperus Juniperus communis Juniperus deppeana Juniperus flaccida Juniperus occidentalis Juniperus sect. Juniperus Juniperus sect. Sabina Juniperus virginiana Kalanchoë Kallstroemia Kalmia Kalmia angustifolia Kalmia microphylla Kalmiopsis Karroochloa Karwinskia Keckiella Keckiella antirrhinoides Keckiella breviflora Keckiella rothrockii Keckiella ternata Kelseya Kerria Kiaeria Kickxia Kindbergia Koanophyllon Kobresia Kochia Kochia scoparia Kochia sect. Neokochia Kochia sect. Semibassia Koeberlinia Koeberlinia spinosa Koeberliniaceae Koeleria Koenigia Kopsiopsis Kosteletzkya Krameria Krameriaceae Krapovickasia Krascheninnikovia Krigia Krigia cespitosa Krugiodendron Kyhosia Kyllinga L w ratio Lachnagrostis Lachnanthes Lachnocaulon Lactuca Lagascea Lagascea decipiens Lagenaria Lagenaria siceraria Lagerstroemia Lagophylla Lagotis Lagotis glauca Lagunaria Laguncularia Lagurus Lamarckia Laportea Lapsana Lapsanastrum Lardizabalaceae Larix Larrea Lasiacis Lasianthaea Lastarriaea Lasthenia Lasthenia californica Lasthenia glabrata Lasthenia sect. Amphiachaenia Lasthenia sect. Burrielia Lasthenia sect. Hologymne Lasthenia sect. Lasthenia Lasthenia sect. Ornduffia Lasthenia sect. Platycarpha Lasthenia sect. Ptilomeris Launaea Lauraceae Lavatera Layia Layia pentachaeta Laënnecia Leavenworthia Lechea Lechea intermedia Lechea maritima Lechea pulchella Lechea torreyi Leersia Leibnitzia Leitneria Leitneriaceae Lembophyllaceae Lemna Lemnaceae Length Lenophyllum Leontodon Leontodon saxatilis Lepanthopsis Lepidium Lepidium lasiocarpum Lepidium virginicum Lepidospartum Leptarrhena Leptobryum Leptochloa Leptochloa fusca Leptochloa panicea Leptodictyum Leptodon Leptodontaceae Leptodontium Leptodontium viticulosoides Leptohymenium Leptopterigynandrum Leptospermum Leptostomopsis Lepuropetalon Lepyrodiclis Lescuraea Leskea Leskeaceae Leskeella Lessingia Lessingia glandulifera Lessingia micradenia Lessingia pectinata Leucanthemella Leucanthemum Leuciva Leucobryaceae Leucobryum Leucocrinum Leucodon Leucodontaceae Leucojum Leucolepis Leucophanaceae Leucophyllum Leucophysalis Leucopoa Leucospora Leucothoë Lewisia Lewisia columbiana Lewisia cotyledon Lewisia rediviva Leymus Leymus innovatus Leymus mollis Leymus salina Leymus simplex Liatris Liatris elegans Liatris pauciflora Liatris punctata Liatris pycnostachya Liatris scariosa Liatris spicata Liatris squarrosa Libertia Licania Licaria Life cycle Ligularia Lilaea Liliaceae Lilium Lilium humboldtii Lilium pardalinum Lilium washingtonianum Limbella Limnanthaceae Limnanthes Limnanthes alba Limnanthes douglasii Limnanthes floccosa Limnanthes sect. Inflexae Limnanthes sect. Limnanthes Limnobium Limnocharitaceae Limnodea Limnophila Limonium Limosella Linaceae Linaria Linaria dalmatica Linaria genistifolia Lindbergia Lindera Lindernia Linderniaceae Lindheimera Linum Linum australe Linum berlandieri Linum carteri Linum floridanum Linum lewisii Linum medium Linum rigidum Linum sect. Cathartolinum Linum sect. Linopsis Linum sect. Linum Liparis Lipocarpha Liquidambar Liriodendron Listera Listera cordata Lithachne Lithocarpus Lithocarpus densiflorus Lithophragma Litsea Littorella Livistona Lloydia Lloydia serotina Loasaceae Lobularia Loeflingia Loeskeobryum Loeskypnum Loganiaceae Logfia Lolium Lolium temulentum Lomariopsis Lomatogonium Lomatogonium rotatum Lophiola Lophophora Lorandersonia Lorentziella Ludwigia Ludwigia glandulosa Ludwigia peploides Ludwigia sect. Isnardia Ludwigia sect. Jussiaea Ludwigia sect. Ludwigia Ludwigia sect. Macrocarpon Ludwigia sect. Myrtocarpus Ludwigia sect. Pterocaulon Ludwigia sect. Seminudae Luetkea Luffa Luffa acutangula Luina Luisierella Luma Lumnitzera Lunaria Luziola Luzula Luzula acuminata Luzula arcuata Luzula luzuloides Luzula multiflora Luzula subg. Anthelaea Luzula subg. Luzula Luzula subg. Pterodes Lycianthes Lycium Lycium pallidum Lycopodiaceae Lycopodiella Lycopodiophyta Lycopodium Lycurus Lyellia Lygodesmia Lygodesmia grandiflora Lygodiaceae Lygodium Lyonia Lyonia ligustrina Lyonothamnus Lyrocarpa Lysichiton Lysimachia Lythraceae Lythrum Lythrum alatum Mabrya Machaeranthera Macleaya Maclura Macradenia Macranthera Macrochloa Macrocoma Macrocoma tenuis Macromitrium Macrothelypteris Madia Magnolia Magnoliaceae Magnoliophyta Maianthemum Maianthemum racemosum Malachra Malacomeles Malacothamnus Malacothrix Malacothrix foliosa Malacothrix saxatilis Malaxis Malaxis monophyllos Malephora Malperia Malpighia Malpighiaceae Malus Malva Malvaceae Malvaceae subfam. Bombacoideae Malvaceae subfam. Byttnerioideae Malvaceae subfam. Grewioideae Malvaceae subfam. Malvoideae Malvaceae subfam. Sterculioideae Malvaceae subfam. Tilioideae Malvastrum Malvaviscus Malvaviscus arboreus Malvella Mammea Mammillaria Mammillaria heyderi Mammillaria prolifera Mammillaria wrightii Mandevilla Manfreda Manihot Manilkara Manilkara jaimiqui Mantisalca Marah Maranta Marantaceae Marshallia Marsilea Marsileaceae Matelea Matricaria Matteuccia Matteuccia struthiopteris Matthiola Maurandella Mauranthemum Maxillaria Maxonia Maxonia apiifolia Mayaca Mayacaceae Maytenus Maytenus phyllanthoides Mazaceae Mazus Mecardonia Mecardonia acuminata Meconella Medeola Meesia Meesiaceae Megathyrsus Meiotrichum Melaleuca Melampodium Melampyrum Melanthera Melanthium Melastoma Melastomataceae Melica Melica geyeri Melica porteri Melica stricta Melinis Melochia Melochia pyramidata Melochia tomentosa Melothria Menispermaceae Menispermum Mentzelia Mentzelia humilis Mentzelia laevicaulis Mentzelia longiloba Mentzelia sect. Bartonia Mentzelia sect. Bicuspidaria Mentzelia sect. Mentzelia Mentzelia sect. Micromentzelia Mentzelia sect. Trachyphytum Mentzelia torreyi Menziesia Mercurialis Merremia Mesadenus Mesembryanthemum Mespilus Metastelma Meteoriaceae Meximalva Mibora Micranthemum Micranthes Micranthes nelsoniana Microbryum Microbryum davallianum Microbryum starckeanum Microchloa Microgramma Micromitrium Micromonolepis Micropsis Micropus Micropus californicus Microseris Microseris douglasii Microseris laciniata Microstachys Microstegium Microthlaspi Mielichhoferia Mielichhoferiaceae Mikania Milium Milla Mimetanthe Mimulus Mimulus ringens Mimusops Minuartia Minuartia nuttallii Mirabilis Mirabilis jalapa Mirabilis laevis Mirabilis linearis Mirabilis multiflora Mirabilis sect. Mirabilis Mirabilis sect. Mirabilopsis Mirabilis sect. Oxybaphoides Mirabilis sect. Oxybaphus Mirabilis sect. Quamoclidion Miscanthus Misopates Misopates orontium Mitella Mitreola Mniaceae Mnium Modiola Moehringia Moenchia Moenchia erecta Mohavea Molendoa Molinia Molluginaceae Mollugo Momordica Momordica charantia Monanthochloë Moneses Monnina Monochoria Monolepis Monolopia Monoptilon Monotropa Monotropsis Montia Moorochloa Moraceae Moringa Moringaceae Mortonia Morus Mosiera Mucronea Muehlenbeckia Muehlenbeckia hastulata Muhlenbergia Muilla Mulgedium Munroa Muntingia Muntingiaceae Munzothamnus Murdannia Musa Musaceae Muscari Myagrum Mycelis Myoporum Myosoton Myosurus Myosurus apetalus Myrcianthes Myrica Myricaceae Myrinia Myriniaceae Myriophyllum Myrsinaceae Myrsine Myrtaceae Myrtus Myurella Myuroclada Najadaceae Najas Najas guadalupensis Nandina Napaea Narcissus Nardus Narthecium Nassella Nasturtium Neckera Neckeraceae Neckeropsis Nectandra Nectouxia Neillia Nekemias Nelumbo Nelumbonaceae Nemacaulis Nemacaulis denudata Nemastylis Nemastylis tenuis Neogaerrhinum Neoholmgrenia Neolloydia Neolloydia conoidea Neomacounia Neonesomia Neostapfia Nephrolepis Nerisyrenia Nerium Neslia Nestotus Nestronia Neurodium Nevada Neviusia Neyraudia Nicandra Nicolletia Nicotiana Nigella Niphotrichum Niphotrichum canescens Niphotrichum sect. Elongata Niphotrichum sect. Niphotrichum Nipponanthemum Nitrophila Noccaea Noccaea fendleri Nogopterium Nolina Nopalea Nothocalaïs Nothochelone Notholaena Notholaena californica Notholaena grayi Nothoscordum Nuphar Nuttallanthus Nyctaginaceae Nyctaginia Nymphaea Nymphaea odorata Nymphaeaceae Nyssa Nyssaceae Obolaria Ochrosia Oclemena Octoblepharum Odontites Odontosoria Odontostomum Oeceoclades Oedipodiaceae Oedipodium Oemleria Oenothera Oenothera (sect. Oenothera) ser. Allochroa Oenothera avita Oenothera californica Oenothera capillifolia Oenothera cespitosa Oenothera cinerea Oenothera deltoides Oenothera drummondii Oenothera elata Oenothera fruticosa Oenothera hartwegii Oenothera heterophylla Oenothera macrocarpa Oenothera pallida Oenothera sect. Anogra Oenothera sect. Calylophus Oenothera sect. Contortae Oenothera sect. Eremia Oenothera sect. Gaura Oenothera sect. Gauropsis Oenothera sect. Hartmannia Oenothera sect. Kleinia Oenothera sect. Kneiffia Oenothera sect. Lavauxia Oenothera sect. Leucocoryne Oenothera sect. Megapterium Oenothera sect. Oenothera Oenothera sect. Pachylophus Oenothera sect. Paradoxus Oenothera sect. Peniophyllum Oenothera stricta Oenothera subsect. Calylophus Oenothera subsect. Campogaura Oenothera subsect. Candela Oenothera subsect. Emersonia Oenothera subsect. Gaura Oenothera subsect. Lavauxia Oenothera subsect. Munzia Oenothera subsect. Nutantigemma Oenothera subsect. Oenothera Oenothera subsect. Raimannia Oenothera subsect. Salpingia Oenothera subsect. Schizocarya Oenothera subsect. Stenosiphon Oenothera subsect. Stipogaura Oenothera subsect. Xenogaura Oenothera subsect. Xerogaura Oenothera tubicula Oenothera villosa Okenia Oligomeris Oligotrichum Olsynium Olsynium douglasii Omalotheca Onagraceae Onagraceae subfam. Ludwigioideae Onagraceae subfam. Onagroideae Onagraceae tribe Circaeeae Onagraceae tribe Epilobieae Onagraceae tribe Onagreae Oncidium Oncophorus Oncosiphon Onoclea Onopordum Onopordum acanthium Operculina Ophioglossaceae Ophioglossum Opizia Oplismenus Opuntia Opuntia basilaris Opuntia engelmannii Opuntia humifusa Opuntia polyacantha Orchidaceae Orchidaceae (tribe Arethuseae) subtribe Arethusinae Orchidaceae (tribe Arethuseae) subtribe Bletiinae Orchidaceae (tribe Cranichideae) subtribe Cranichidinae Orchidaceae (tribe Cranichideae) subtribe Goodyerinae Orchidaceae (tribe Cranichideae) subtribe Prescottiinae Orchidaceae (tribe Cranichideae) subtribe Spiranthinae Orchidaceae (tribe Cymbidieae) subtribe Corallorhizinae Orchidaceae (tribe Cymbidieae) subtribe Cyrtopodiinae Orchidaceae (tribe Cymbidieae) subtribe Eulophiinae Orchidaceae (tribe Cymbidieae) subtribe Goveniinae Orchidaceae (tribe Epidendreae) subtribe Laeliinae Orchidaceae (tribe Epidendreae) subtribe Pleurothallidinae Orchidaceae (tribe Epidendreae) subtribe Polystachynae Orchidaceae (tribe Maxillarieae) subtribe Maxillariinae Orchidaceae (tribe Maxillarieae) subtribe Oncidiinae Orchidaceae (tribe Neottieae) subtribe Limodorinae Orchidaceae (tribe Orchideae) subtribe Habenariinae Orchidaceae (tribe Orchideae) subtribe Orchidinae Orchidaceae (tribe Vanilleae) subtribe Pogoniinae Orchidaceae (tribe Vanilleae) subtribe Vanillinae Orchidaceae subfam. Cypripedioideae Orchidaceae subfam. Epidendroideae Orchidaceae subfam. Orchidoideae Orchidaceae subfam. Vanilloideae Orchidaceae tribe Arethuseae Orchidaceae tribe Calypsoeae Orchidaceae tribe Cranichideae Orchidaceae tribe Cymbidieae Orchidaceae tribe Dendrobieae Orchidaceae tribe Epidendreae Orchidaceae tribe Malaxideae Orchidaceae tribe Maxillarieae Orchidaceae tribe Neottieae Orchidaceae tribe Orchideae Orchidaceae tribe Triphoreae Orchidaceae tribe Tropidieae Orchidaceae tribe Vandeae Orchidaceae tribe Vanilleae Orcuttia Oreas Oreochrysum Oreostemma Oreostemma alpigenum Ornithogalum Ornithostaphylos Orobanchaceae Orobanche Orobanche californica Orobanche cooperi Orobanche corymbosa Orobanche parishii Orobanche uniflora Orobanche valida Orochaenactis Orontium Orthilia Orthocarpus Orthocarpus cuspidatus Orthocarpus tolmiei Orthodontiaceae Orthodontium Orthosia Orthothecium Orthothecium chryseum Orthotrichaceae Orthotrichum Orthotrichum pallens Orychophragmus Oryctes Oryza Oryzopsis Osmadenia Osmunda Osmunda regalis Osmundaceae Osteospermum Ostrya Ottelia Oxalidaceae Oxalis Oxalis frutescens Oxalis hirta Oxycaryum Oxydendrum Oxyria Oxyrrhynchium Oxystylis Oxytenia Oxytheca Oxytheca dendroidea Oönopsis Oönopsis foliosa Pachycereus Pachysandra Packera Packera bolanderi Packera dimorphophylla Packera eurycephala Packera neomexicana Packera pseudaurea Packera subnuda Paeonia Paeoniaceae Pages using duplicate arguments in template calls Pages with broken file links Palafoxia Palamocladium Palhinhaea Paliurus Paludella Palustriella Panicum Panicum amarum Panicum anceps Panicum capillare Panicum dichotomiflorum Panicum hallii Panicum hirticaule Panicum miliaceum Panicum philadelphicum Panicum rigidulum Panicum sect. Agrostoidea Panicum sect. Antidotalia Panicum sect. Bulbosa Panicum sect. Dichotomiflora Panicum sect. Hemitonia Panicum sect. Monticola Panicum sect. Obtusa Panicum sect. Panicum Panicum sect. Phanopyrum Panicum sect. Repentia Panicum sect. Tenera Panicum sect. Urvilleana Panicum sect. Verrucosa Panicum subg. Agrostoidea Panicum subg. Panicum Panicum subg. Phanopyrum Papaver Papaver macounii Papaver nudicaule Papaver radicatum Papaver sect. Argemonidium Papaver sect. Californicum Papaver sect. Macrantha Papaver sect. Meconella Papaver sect. Papaver Papaver sect. Rhoeadium Papaveraceae Papillaria Pappophorum Paraleucobryum Parapholis Parasenecio Parietaria Parietaria hespera Parkeriaceae Parnassia Parnassia cirrata Paronychia Paronychia chartacea Paronychia echinulata Paronychia fastigiata Parrya Parthenice Parthenium Parthenocissus Pascalia Pascopyrum Paspalidium Paspalum Paspalum setaceum Passiflora Passiflora foetida Passifloraceae Pattalias Paulownia Paulowniaceae Pavonia Paxistima Paysonia Paysonia lasiocarpa Pecluma Pecluma ptilodon Pectis Pectis angustifolia Pectis filipes Pectis linifolia Pectis papposa Pedaliaceae Pedicularis Pedicularis attollens Pedicularis bracteosa Pedicularis centranthera Pedicularis contorta Pedicularis lanata Pedicularis langsdorffii Pedicularis palustris Pedicularis parryi Pedicularis racemosa Pedicularis semibarbata Pedicularis sudetica Pediocactus Pediocactus peeblesianus Pelexia Pellaea Pellaea glabella Pellaea mucronata Pellaea ternifolia Peltandra Peniocereus Peniocereus greggii Pennellia Pennisetum Penstemon Penstemon acuminatus Penstemon ambiguus Penstemon angustifolius Penstemon attenuatus Penstemon azureus Penstemon barbatus Penstemon caespitosus Penstemon cardinalis Penstemon clevelandii Penstemon cobaea Penstemon crandallii Penstemon cyananthus Penstemon davidsonii Penstemon deustus Penstemon eatonii Penstemon eriantherus Penstemon floridus Penstemon fremontii Penstemon fruticiformis Penstemon fruticosus Penstemon gairdneri Penstemon glaber Penstemon glandulosus Penstemon heterodoxus Penstemon heterophyllus Penstemon humilis Penstemon laetus Penstemon laricifolius Penstemon leiophyllus Penstemon lentus Penstemon leonardii Penstemon linarioides Penstemon montanus Penstemon newberryi Penstemon nitidus Penstemon pachyphyllus Penstemon palmeri Penstemon procerus Penstemon pseudospectabilis Penstemon rattanii Penstemon richardsonii Penstemon rydbergii Penstemon scariosus Penstemon sect. Ambigui Penstemon sect. Baccharifolii Penstemon sect. Bridgesiani Penstemon sect. Caespitosi Penstemon sect. Chamaeleon Penstemon sect. Coerulei Penstemon sect. Cristati Penstemon sect. Dissecti Penstemon sect. Elmigera Penstemon sect. Erianthera Penstemon sect. Gentianoides Penstemon sect. Glabri Penstemon sect. Penstemon Penstemon sect. Petiolati Penstemon sect. Saccanthera Penstemon sect. Spectabiles Penstemon secundiflorus Penstemon spectabilis Penstemon subg. Dasanthera Penstemon subg. Penstemon Penstemon triflorus Penstemon virgatus Pentachaeta Pentachaeta exilis Pentagramma Pentagramma triangularis Pentalinon Penthoraceae Penthorum Pentzia Peperomia Peraphyllum Pereskia Pereskia grandifolia Pericallis Pericome Peritoma Peritoma arborea Perityle Perityle bisetosa Perityle gilensis Perityle lindheimeri Perityle megalocephala Perityle microglossa Perityle rupestris Perityle sect. Laphamia Perityle sect. Pappothrix Perityle sect. Perityle Perityle staurophylla Persea Persicaria Persicaria meisneriana Persicaria sect. Cephalophilon Persicaria sect. Echinocaulon Persicaria sect. Persicaria Persicaria sect. Rubrivena Persicaria sect. Tovara Persicaria wallichii Petalonyx Petalonyx thurberi Petasites Petasites frigidus Petiveria Petradoria Petradoria pumila Petrogenia Petrophytum Petrophytum caespitosum Petrorhagia Petrorhagia saxifraga Petunia Peucephyllum Phalacroseris Phalaris Phanerophlebia Pharus Phaulothamnus Phedimus Phegopteris Phemeranthus Phenology Pherotrichis Philadelphus Philadelphus microphyllus Philadelphus texensis Philonotis Philonotis fontana Phippsia Phlebodium Phlegmariurus Phleum Phoebanthus Phoenicaulis Phoenix Phoradendron Phoradendron villosum Photinia Photinia davidiana Phragmites Phryma Phryma leptostachya Phrymaceae Phyllanthaceae Phyllanthopsis Phyllanthus Phyllanthus abnormis Phyllanthus caroliniensis Phyllanthus liebmannianus Phyllanthus urinaria Phyllodoce Phyllospadix Phyllostachys Physalis Physalis cinerascens Physalis longifolia Physalis mollis Physalis pumila Physalis ×elliottii Physaria Physaria arenosa Physaria argyraea Physaria carinata Physaria didymocarpa Physaria douglasii Physaria floribunda Physaria geyeri Physaria gracilis Physaria hemiphysaria Physaria hitchcockii Physaria kingii Physaria lepidota Physaria newberryi Physaria occidentalis Physaria ovalifolia Physaria saximontana Physcomitrella Physcomitrium Physocarpus Phytolacca Phytolacca americana Phytolaccaceae Picea Picea engelmannii Picradeniopsis Picramnia Picramniaceae Picris Picrodendraceae Picrothamnus Pieris Pilea Pilosium Pilosocereus Pilostyles Pilotrichaceae Pilularia Pinaceae Pinaropappus Pinus Pinus contorta Pinus elliottii Pinus leiophylla Pinus ponderosa Pinus sylvestris Pinus torreyana Piper Piperaceae Piperia Piperia elegans Piptatherum Piptatherum miliaceum Piptochaetium Pireella Piriqueta Piriqueta cistoides Pisonia Pistia Pityopsis Pityopsis aspera Pityopsis graminifolia Pityopus Pityrogramma Pityrogramma calomelanos Plagiobryoides Plagiobryum Plagiomnium Plagiopus Plagiotheciaceae Plagiothecium Planera Planodes Plantaginaceae Plantago Platanaceae Platanthera Platanthera blephariglottis Platanthera dilatata Platanthera flava Platanthera tipuloides Platanus Plateilema Plates Platydictya Platygyrium Platylomella Platyschkuhria Platystemon Platythelys Plaubelia Plaubelia sprengelii Plectocephalus Pleea Pleiacanthus Pleopeltis Pleopeltis polylepis Pleopeltis polypodioides Pleradenophora Pleuricospora Pleuridium Pleurochaete Pleurocoronis Pleuropogon Pleuropogon californicus Pleurothallis Pleuroziopsaceae Pleuroziopsis Pleurozium Ploidy Pluchea Pluchea odorata Plumbaginaceae Plumbago Plumeria Poa Poa abbreviata Poa alpina Poa arctica Poa bulbosa Poa cusickii Poa fendleriana Poa glauca Poa hartzii Poa laxa Poa pratensis Poa saltuensis Poa sect. Abbreviatae Poa sect. Alpinae Poa sect. Arctopoa Poa sect. Arenariae Poa sect. Dioicopoa Poa sect. Homalopoa Poa sect. Madropoa Poa sect. Micrantherae Poa sect. Oreinos Poa sect. Pandemos Poa sect. Poa Poa sect. Secundae Poa sect. Stenopoa Poa sect. Sylvestres Poa sect. Tichopoa Poa secunda Poa stenantha Poa subg. Arctopoa Poa subg. Poa Poa subsect. Epiles Poa subsect. Halophytae Poa subsect. Madropoa Poa subsect. Poa Poa subsect. Secundae Poa unilateralis Poaceae Poaceae subfam. Aristidoideae Poaceae subfam. Arundinoideae Poaceae subfam. Bambusoideae Poaceae subfam. Centothecoideae Poaceae subfam. Chloridoideae Poaceae subfam. Danthonioideae Poaceae subfam. Ehrhartoideae Poaceae subfam. Panicoideae Poaceae subfam. Pharoideae Poaceae subfam. Pooideae Poaceae tribe Andropogoneae Poaceae tribe Aristideae Poaceae tribe Arundineae Poaceae tribe Bambuseae Poaceae tribe Brachyelytreae Poaceae tribe Brachypodieae Poaceae tribe Bromeae Poaceae tribe Centotheceae Poaceae tribe Cynodonteae Poaceae tribe Danthonieae Poaceae tribe Diarrheneae Poaceae tribe Ehrharteae Poaceae tribe Gynerieae Poaceae tribe Meliceae Poaceae tribe Nardeae Poaceae tribe Olyreae Poaceae tribe Orcuttieae Poaceae tribe Oryzeae Poaceae tribe Paniceae Poaceae tribe Pappophoreae Poaceae tribe Phareae Poaceae tribe Poeae Poaceae tribe Stipeae Poaceae tribe Thysanolaeneae Poaceae tribe Triticeae Podagrostis Podophyllum Podostemaceae Podostemum Pogonarthria Pogonatum Pogonia Pohlia Polanisia Polanisia dodecandra Polanisia erosa Polycarpaea Polycarpon Polycarpon tetraphyllum Polycnemum Polyctenium Polygala Polygalaceae Polygaloides Polygonaceae Polygonaceae subfam. Eriogonoideae Polygonaceae subfam. Polygonoideae Polygonatum Polygonella Polygonella polygama Polygonum Polygonum aviculare Polygonum fowleri Polygonum humifusum Polygonum oxyspermum Polygonum polygaloides Polygonum ramosissimum Polygonum sawatchense Polygonum sect. Duravia Polygonum sect. Polygonum Polymnia Polypodiaceae Polypodiophyta Polypodium Polypogon Polypremum Polystachya Polystemma Polystichum Polystichum imbricans Polytrias Polytrichaceae Polytrichastrum Polytrichastrum alpinum Polytrichastrum formosum Polytrichastrum sexangulare Polytrichum Polytrichum commune Pontederia Pontederiaceae Ponthieva Populus Populus deltoides Populus fremontii Poranopsis Porophyllum Porophyllum ruderale Porotrichum Portulaca Portulaca umbraticola Portulacaceae Position Position relational Potamogeton Potamogeton foliosus Potamogeton pusillus Potamogetonaceae Potentilla Potentilla anserina Potentilla arenosa Potentilla concinna Potentilla crebridens Potentilla effusa Potentilla glaucophylla Potentilla gracilis Potentilla hyparctica Potentilla ovina Potentilla rhyolitica Potentilla sect. Arenicolae Potentilla sect. Aureae Potentilla sect. Biflorae Potentilla sect. Brevifoliae Potentilla sect. Chrysanthae Potentilla sect. Concinnae Potentilla sect. Graciles Potentilla sect. Leucophyllae Potentilla sect. Lupinoides Potentilla sect. Multijugae Potentilla sect. Niveae Potentilla sect. Pensylvanicae Potentilla sect. Pentaphylloides Potentilla sect. Potentilla Potentilla sect. Rectae Potentilla sect. Rivales Potentilla sect. Rubrae Potentilla sect. Rubricaules Potentilla sect. Subjugae Potentilla sect. Subviscosae Potentilla sect. Terminales Potentilla subviscosa Potentilla supina Potentilla thurberi Poteridium Poterium Poterium sanguisorba Pottiaceae Pottiaceae subfam. Barbuloideae Pottiaceae subfam. Merceyoideae Pottiaceae subfam. Pottioideae Pottiaceae subfam. Timmielloideae Pottiaceae subfam. Trichostomoideae Pouteria Pouzolzia Prenanthella Prenanthes Prescottia Primula Primula cuneifolia Primula cusickiana Primulaceae Prosartes Proserpinaca Prosthechea Prosthechea boothiana Prosthechea cochleata Proteaceae Prunus Prunus fasciculata Prunus ilicifolia Prunus pumila Prunus serotina Prunus virginiana Psacalium Psathyrostachys Psathyrotes Psathyrotopsis Pseudabutilon Pseudelephantopus Pseudephemerum Pseudobahia Pseudobraunia Pseudobryum Pseudocalliergon Pseudocampylium Pseudoclappia Pseudocrossidium Pseudocryphaea Pseudocydonia Pseudoditrichaceae Pseudoditrichum Pseudognaphalium Pseudogynoxys Pseudoleskea Pseudoleskea incurvata Pseudoleskea radicosa Pseudoleskeella Pseudolycopodiella Pseudophoenix Pseudophoenix sargentii Pseudorchis Pseudorchis albida Pseudoroegneria Pseudorontium Pseudosasa Pseudoscleropodium Pseudostellaria Pseudotaxiphyllum Pseudotsuga Pseudotsuga menziesii Psidium Psilactis Psilocarphus Psilocarphus brevissimus Psilopilum Psilostrophe Psilotaceae Psilotophyta Psilotum Pteridaceae Pteridium Pteridium aquilinum Pteridophytes Pterigynandraceae Pterigynandrum Pteris Pteris cretica Pterobryaceae Pterocaulon Pteroglossaspis Pterospora Pterostegia Pterygoneurum Pterygoneurum subsessile Ptilagrostis Ptilium Ptychomitriaceae Ptychomitrium Ptychosperma Ptychostomum Ptychostomum subg. Cladodium Ptychostomum subg. Ptychostomum Puccinellia Pulicaria Punica Purshia Purshia tridentata Putranjivaceae Pylaisia Pylaisiadelpha Pyracantha Pyramidula Pyrola Pyrola asarifolia Pyrrhobryum Pyrrhopappus Pyrrocoma Pyrrocoma carthamoides Pyrrocoma clementis Pyrrocoma crocea Pyrrocoma hirta Pyrrocoma lanceolata Pyrrocoma racemosa Pyrrocoma uniflora Pyrularia Pyrus Pyxidanthera Quadrella Quantity Quercus Quercus durata Quercus garryana Quercus sect. Lobatae Quercus sect. Protobalanus Quercus sect. Quercus Quercus sinuata Quincula Racomitrium Racopilaceae Racopilum Radiola Rafinesquia Raillardella Rainiera Ranunculaceae Ranunculus Ranunculus acriformis Ranunculus alismifolius Ranunculus aquatilis Ranunculus arizonicus Ranunculus bonariensis Ranunculus californicus Ranunculus canus Ranunculus eschscholtzii Ranunculus flammula Ranunculus glaberrimus Ranunculus glacialis Ranunculus harveyi Ranunculus hispidus Ranunculus inamoenus Ranunculus occidentalis Ranunculus orthorhynchus Ranunculus pedatifidus Ranunculus recurvatus Ranunculus sceleratus Ranunculus sect. Arcteranthis Ranunculus sect. Cyrtorhyncha Ranunculus sect. Echinella Ranunculus sect. Epirotes Ranunculus sect. Flammula Ranunculus sect. Halodes Ranunculus sect. Hecatonia Ranunculus sect. Pseudaphanostemma Ranunculus sect. Ranunculus Ranunculus subg. Batrachium Ranunculus subg. Ceratocephala Ranunculus subg. Coptidium Ranunculus subg. Crymodes Ranunculus subg. Cyrtorhyncha Ranunculus subg. Ficaria Ranunculus subg. Oxygraphis Ranunculus subg. Pallasiantha Ranunculus subg. Ranunculus Raphanus Rapistrum Ratibida Ratibida peduncularis Rauiella Rauvolfia Rayjacksonia Redfieldia Reference Reimarochloa Remirea Reseda Resedaceae Revised Since Print Reynosia Rhabdadenia Rhabdoweisia Rhachitheciaceae Rhachithecium Rhagadiolus Rhamnaceae Rhamnus Rhamnus davurica Rhamnus utilis Rhapidophyllum Rheum Rhexia Rhexia mariana Rhexophyllum Rhinanthus Rhinanthus minor Rhinotropis Rhinotropis cornuta Rhinotropis lindheimeri Rhinotropis nitida Rhinotropis rimulicola Rhizogoniaceae Rhizomnium Rhizophora Rhizophoraceae Rhodiola Rhodiola integrifolia Rhodobryum Rhododendron Rhododendron minus Rhodomyrtus Rhodomyrtus tomentosa Rhodotypos Rhynchosida Rhynchospora Rhynchospora globularis Rhynchospora harveyi Rhynchostegium Rhytidiaceae Rhytidiadelphus Rhytidiopsis Rhytidium Ribes Ribes aureum Ribes californicum Ribes cereum Ribes divaricatum Ribes inerme Ribes oxyacanthoides Ribes roezlii Ribes sanguineum Ricinus Rigiopappus Rivina Roellobryaceae Roellobryon Roemeria Roldana Romneya Romulea Rorippa Rorippa palustris Rosa Rosa acicularis Rosa carolina Rosa gymnocarpa Rosa nutkana Rosa pisocarpa Rosa rubiginosa Rosa sect. Bracteatae Rosa sect. Caninae Rosa sect. Gallicae Rosa sect. Laevigatae Rosa sect. Minutifoliae Rosa sect. Pimpinellifoliae Rosa sect. Rosa Rosa sect. Systylae Rosa stellata Rosa subg. Hesperhodos Rosa subg. Rosa Rosa woodsii Rosaceae Rosaceae subfam. Amygdaloideae Rosaceae subfam. Dryadoideae Rosaceae subfam. Rosoideae Rosaceae tribe Agrimonieae Rosaceae tribe Amygdaleae Rosaceae tribe Colurieae Rosaceae tribe Dryadeae Rosaceae tribe Exochordeae Rosaceae tribe Gillenieae Rosaceae tribe Kerrieae Rosaceae tribe Lyonothamneae Rosaceae tribe Neillieae Rosaceae tribe Potentilleae Rosaceae tribe Roseae Rosaceae tribe Rubeae Rosaceae tribe Sorbarieae Rosaceae tribe Spiraeeae Rosaceae tribe Ulmarieae Rostraria Rosulabryum Rotala Rottboellia Roystonea Rubus Rubus arcticus Rubus idaeus Rubus leucodermis Rudbeckia Rudbeckia fulgida Rudbeckia grandiflora Rudbeckia hirta Rudbeckia laciniata Rudbeckia sect. Dracopis Rudbeckia sect. Macrocline Rudbeckia sect. Rudbeckia Rudbeckia triloba Rugelia Rugosa Rumex Rumex sect. Axillares Rumex sect. Rumex Rumex subg. Acetosa Rumex subg. Acetosella Rumex subg. Platypodium Rumex subg. Rumex Ruppia Ruppiaceae Russelia Rutenbergiaceae Rytidosperma Sabal Sabatia Sabatia macrophylla Saccharum Saccharum brevibarbe Sacciolepis Sachsia Sacoila Sacoila lanceolata Saelania Sageretia Sagina Sagina decumbens Sagina maxima Sagina nodosa Sagittaria Sagittaria graminea Sagittaria guayanensis Sagittaria lancifolia Sagittaria montevidensis Sairocarpus Sairocarpus cornutus Sairocarpus vexillocalyculatus Salicaceae Salicornia Salix Salix alaxensis Salix brachycarpa Salix calcicola Salix exigua Salix glauca Salix humilis Salix lasiandra Salix ovalifolia Salix rotundifolia Salix sect. Arbuscella Salix sect. Argyrocarpae Salix sect. Canae Salix sect. Candidae Salix sect. Chamaetia Salix sect. Cinerella Salix sect. Cordatae Salix sect. Daphnella Salix sect. Diplodictyae Salix sect. Floridanae Salix sect. Fulvae Salix sect. Geyerianae Salix sect. Glaucae Salix sect. Griseae Salix sect. Hastatae Salix sect. Helix Salix sect. Herbella Salix sect. Humboldtianae Salix sect. Lanatae Salix sect. Maccallianae Salix sect. Mexicanae Salix sect. Myrtilloides Salix sect. Myrtosalix Salix sect. Nigricantes Salix sect. Ovalifoliae Salix sect. Phylicifoliae Salix sect. Salicaster Salix sect. Salix Salix sect. Setchellianae Salix sect. Sitchenses Salix sect. Subalbae Salix sect. Triandrae Salix sect. Villosae Salix sect. Viminella Salix subg. Chamaetia Salix subg. Longifoliae Salix subg. Protitea Salix subg. Salix Salix subg. Vetrix Salix wolfii Salpichroa Salsola Salsola kali Salvinia Salviniaceae Samolus Sandbergia Sanguinaria Sanguisorba Sanionia Sansevieria Santalaceae Santalum Santolina Sanvitalia Saponaria Sapotaceae Sarcobatus Sarcocornia Sarcodes Sarmentypnum Sarracenia Sarracenia alabamensis Sarracenia purpurea Sarracenia rubra Sarraceniaceae Sartwellia Sassafras Saururaceae Saururus Saussurea Saussurea amara Saussurea angustifolia Saxifraga Saxifraga bronchialis Saxifraga flagellaris Saxifraga oppositifolia Saxifraga rivularis Saxifragaceae Saxifragopsis Scabrethia Scabrethia scabra Schaefferia Schedonnardus Schedonorus Schenkia Scheuchzeria Scheuchzeriaceae Schiedeella Schisandra Schisandraceae Schismus Schistidium Schistophragma Schistostega Schistostegaceae Schizachne Schizachyrium Schizachyrium sanguineum Schizachyrium scoparium Schizaea Schizaeaceae Schizanthus Schkuhria Schlotheimia Schoenobryum Schoenocaulon Schoenolirion Schoenoplectus Schoenoplectus acutus Schoenoplectus erectus Schoenoplectus purshianus Schoenoplectus sect. Actaeogeton Schoenoplectus sect. Malacogeton Schoenoplectus sect. Schoenoplectus Schoenoplectus sect. Supini Schoenoplectus smithii Schoenus Schoepfia Schoepfiaceae Schwalbea Schwetschkeopsis Scilla Scirpus Sciuro-hypnum Scleranthus Scleranthus annuus Scleranthus perennis Scleria Scleria ciliata Scleria pauciflora Sclerocactus Sclerocarpus Sclerochloa Sclerolepis Sclerolinon Scleropodium Scleropodium touretii Scleropogon Scoliopus Scolochloa Scolymus Scoparia Scopelophila Scopulophila Scorpidium Scorzonera Scouleria Scouleriaceae Scribneria Scrophularia Scrophulariaceae Secale Sedella Sedum Sedum lanceolatum Sedum laxum Sedum obtusatum Sedum oreganum Sedum radiatum Sedum spathulifolium Sedum stenopetalum Sedum wrightii Selaginella Selaginella arenicola Selaginella mutica Selaginella subg. Selaginella Selaginella subg. Stachygynandrum Selaginella subg. Tetragonostachys Selaginellaceae Selenia Selenicereus Seligeria Seligeriaceae Sematophyllaceae Sematophyllum Sempervivum Senecio Senecio amplectens Senecio bigelovii Senecio eremophilus Senecio flaccidus Senecio fremontii Senecio integerrimus Senecio multidentatus Senecio serra Sequoia Sequoiadendron Serenoa Sericocarpus Sericocarpus oregonensis Sesamum Sesleria Sesuvium Setaria Setaria pumila Setaria reverchonii Setaria subg. Paurochaetium Setaria subg. Ptychophyllum Setaria subg. Reverchoniae Setaria subg. Setaria Setaria viridis Setariopsis Seymeria Seymeria falcata Seymeria pectinata Shape Shepherdia Shinnersia Shinnersoseris Shortia Shortia galacifolia Sibara Sibaropsis Sibbaldia Sibbaldiopsis Sicyos Sicyosperma Sida Sida elliottii Sidalcea Sidalcea asprella Sidalcea calycosa Sidalcea hickmanii Sidalcea malviflora Sidalcea oregana Sidastrum Sideroxylon Sideroxylon lanuginosum Sideroxylon reclinatum Sidotheca Sieversia Silene Silene campanulata Silene caroliniana Silene conica Silene dichotoma Silene douglasii Silene drummondii Silene flos-cuculi Silene greenei Silene hookeri Silene involucrata Silene laciniata Silene scouleri Silene uralensis Silene viscaria Silphium Silphium asteriscus Silphium integrifolium Silphium perfoliatum Silphium radula Silphium terebinthinaceum Silybum Simmondsia Simmondsiaceae Simsia Sinapis Sinosenecio Sisymbrium Sisyrinchium Sisyrinchium idahoense Sisyrinchium montanum Size Smallanthus Smelowskia Smilacaceae Smilax Solanaceae Solanum Solanum carolinense Solanum citrullifolium Solanum tenuipes Soleirolia Solidago Solidago (sect. Solidago) ser. Argutae Solidago (sect. Solidago) ser. Auriculatae Solidago (sect. Solidago) ser. Brachychaeta Solidago (sect. Solidago) ser. Drummondiani Solidago (sect. Solidago) ser. Odorae Solidago (sect. Solidago) ser. Venosae Solidago altissima Solidago arguta Solidago arguta subsp. arguta Solidago arguta subsp. caroliniana Solidago caesia Solidago canadensis Solidago curtisii Solidago lepida Solidago nemoralis Solidago odora Solidago patula Solidago puberula Solidago rigida Solidago rugosa Solidago rugosa subsp. aspera Solidago rugosa subsp. rugosa Solidago sect. Ptarmicoidei Solidago sect. Solidago Solidago sempervirens Solidago simplex Solidago speciosa Solidago stricta Solidago subsect. Argutae Solidago subsect. Glomeruliflorae Solidago subsect. Humiles Solidago subsect. Junceae Solidago subsect. Maritimae Solidago subsect. Multiradiatae Solidago subsect. Nemorales Solidago subsect. Squarrosae Solidago subsect. Thyrsiflorae Solidago subsect. Triplinerviae Solidago subsect. Venosae Solidago ulmifolia Solidago velutina Soliva Solmsiella Some measurement Sonchus Sonchus arvensis Sophronanthe Sorbaria Sorbus Sorbus sect. Commixtae Sorbus sect. Sambucifoliae Sorbus sect. Sorbus Sorbus sect. Tianshanicae Sorbus sitchensis Sorbus subg. Aria Sorbus subg. Sorbus Sorbus subg. Torminaria Sorghastrum Sorghum Sorghum bicolor Sparaxis Sparganiaceae Sparganium Spartina Spergula Spergularia Spergularia canadensis Spergularia macrotheca Spergularia media Spergularia platensis Sphaeralcea Sphaeralcea ambigua Sphaeralcea angustifolia Sphaeralcea caespitosa Sphaeralcea coccinea Sphaeralcea coulteri Sphaeralcea fendleri Sphaeralcea rusbyi Sphaeromeria Sphaeromeria potentilloides Sphagnaceae Sphagneticola Sphagnum Sphagnum fimbriatum Sphagnum majus Sphagnum sect. Acutifolia Sphagnum sect. Cuspidata Sphagnum sect. Insulosa Sphagnum sect. Isocladus Sphagnum sect. Polyclada Sphagnum sect. Rigida Sphagnum sect. Sphagnum Sphagnum sect. Squarrosa Sphagnum sect. Subsecunda Sphenoclea Sphenocleaceae Sphenopholis Spigelia Spinacia Spiraea Spiraea alba Spiraea douglasii Spiraea splendens Spiraea tomentosa Spiranthes Spiranthes casei Spiranthes lacera Spiranthes ovalis Spirodela Splachnaceae Splachnobryaceae Splachnobryum Splachnum Spodiopogon Sporobolus Sporobolus compositus Sporobolus vaginiflorus Stanleya Stanleya pinnata Staphylea Staphyleaceae Stebbinsoseris Stegonia Stegonia latifolia Steinchisma Stellaria Stellaria borealis Stellaria cuspidata Stellaria longipes Stemodia Stemonaceae Stenanthium Stenocereus Stenogonum Stenorrhynchos Stenotaphrum Stenotus Stenotus armerioides Stenotus lanuginosus Stephanomeria Stephanomeria exigua Stephanomeria virgata Stereophyllaceae Stereophyllum Stevia Stevia ovata Stevia plummerae Stevia salicifolia Stewartia Stictocardia Stillingia Stipa Stipulicida Stipulicida setacea Stokesia Straminergon Streptanthella Streptanthus Streptanthus carinatus Streptanthus cordatus Streptanthus glandulosus Streptanthus insignis Streptopus Striga Strigosella Structure Strychnos Stuckenia Stuckenia filiformis Stylisma Stylisma patens Stylisma pickeringii Stylocline Stylomecon Stylophorum Styracaceae Styrax Styrax platanifolius Suaeda Suaeda sect. Brezia Suaeda sect. Limbogermen Suaeda sect. Schanginia Subularia Subularia aquatica Suckleya Suksdorfia Sullivantia Sullivantia hapemanii Suriana Surianaceae Swallenia Swertia Syagrus Symblepharis Symphyotrichum Symphyotrichum concolor Symphyotrichum drummondii Symphyotrichum ericoides Symphyotrichum falcatum Symphyotrichum foliaceum Symphyotrichum laeve Symphyotrichum lanceolatum Symphyotrichum novi-belgii Symphyotrichum ontarionis Symphyotrichum patens Symphyotrichum pilosum Symphyotrichum puniceum Symphyotrichum sect. Conyzopsis Symphyotrichum sect. Occidentales Symphyotrichum sect. Symphyotrichum Symphyotrichum spathulatum Symphyotrichum subg. Ascendentes Symphyotrichum subg. Astropolium Symphyotrichum subg. Chapmaniani Symphyotrichum subg. Symphyotrichum Symphyotrichum subg. Virgulus Symphyotrichum subulatum Symphyotrichum tenuifolium Symplocaceae Symplocarpus Symplocos Synedrella Syngonanthus Synthlipsis Synthyris Synthyris missurica Syntrichia Syntrichopappus Syringodium Syrrhopodon Syrrhopodon prolifer Systenotheca Syzygium Tabernaemontana Taeniatherum Tagetes Takakia Takakiaceae Talinopsis Talinum Talipariti Talipariti tiliaceum Tamaricaceae Tamarix Tamaulipa Tanacetum Taraxacum Taraxia Tarenaya Taxaceae Taxiphyllum Taxithelium Taxodium Taxodium distichum Taxus Tayloria Tectaria Teesdalia Telesonix Tellima Tephroseris Terminalia Tetrachondraceae Tetracoccus Tetradymia Tetradymia axillaris Tetragonia Tetragonotheca Tetraneuris Tetraneuris acaulis Tetraneuris linearifolia Tetraneuris scaposa Tetraphidaceae Tetraphis Tetraphis pellucida Tetraplodon Tetrapteron Tetrazygia Tetrodontium Tetrodontium brownianum Texture Thalassia Thalia Thalictrum Thalictrum sect. Anemonella Thalictrum sect. Heterogamia Thalictrum sect. Leucocoma Thalictrum sect. Omalophysa Thalictrum sect. Physocarpum Thalictrum sect. Thalictrum Thamnobryum Theaceae Thelesperma Thelia Theliaceae Thelocactus Thelocactus bicolor Thelypodiopsis Thelypodium Thelypodium howellii Thelypodium integrifolium Thelypodium sagittatum Thelypteridaceae Thelypteris Thelypteris grandis Thelypteris hispidula Thelypteris ovata Thelypteris palustris Thelypteris patens Thelypteris pilosa Thelypteris puberula Thelypteris subg. Amauropelta Thelypteris subg. Cyclosorus Thelypteris subg. Goniopteris Thelypteris subg. Lastrea Thelypteris subg. Meniscium Thelypteris subg. Parathelypteris Thelypteris subg. Stegnogramma Thelypteris subg. Thelypteris Themeda Theophrastaceae Therorhodion Thesiaceae Thesium Thespesia Thevetia Thinopyrum Thinopyrum intermedium Thismia Thladiantha Thlaspi Thrinax Thuidiaceae Thuidium Thuidium delicatulum Thuja Thurovia Thymelaea Thymelaeaceae Thymophylla Thymophylla aurea Thymophylla pentachaeta Thymophylla setifolia Thymophylla tenuiloba Thyrsanthella Thysanocarpus Thysanocarpus laciniatus Thysanolaena Tiarella Tiarella trifoliata Tidestromia Tidestromia suffruticosa Tilia Tillandsia Tillandsia fasciculata Timmia Timmia megapolitana Timmia norvegica Timmiaceae Timmiella Tinantia Tipularia Tithonia Tofieldia Toiyabea Tolmiea Tolpis Tolumnia Tomentypnum Tonella Tonestus Top Level Property Torenia Torreya Torreyochloa Torreyochloa pallida Tortella Tortella inclinata Tortella tortuosa Tortula Tortula cuneifolia Townsendia Trachelospermum Trachycystis Trachypogon Trachyxiphium Tracyina Tradescantia Tradescantia occidentalis Tragia Tragopogon Tragus Transberingia Transberingia bursifolia Trapa Trautvetteria Treatment Trema Trematodon Triadenum Triadica Triantha Triantha occidentalis Trianthema Tribolium Tribulus Trichloris Trichocentrum Trichocoronis Trichocoronis wrightii Trichodon Trichodon cylindricus Trichomanes Trichomanes punctatum Trichoneura Trichophorum Trichoptilium Trichostigma Trichostomum Trichostomum tenuirostre Tridax Tridens Tridens flavus Tridens muticus Trientalis Triglochin Trillium Trillium chloropetalum Trillium erectum Trillium ovatum Trillium pusillum Trillium subg. Phyllantherum Trillium subg. Trillium Triniteurybia Triphora Triphora trianthophoros Triphysaria Triphysaria eriantha Triphysaria versicolor Triplasis Tripleurospermum Tripleurospermum maritimum Tripogon Tripsacum Tripsacum sect. Fasciculata Tripsacum sect. Tripsacum Tripterocalyx Tripterocladium Triquetrella Triraphis Trisetum Triteleia Triteleia ixioides Triteleiopsis Triticum Triumfetta Trixis Trixis californica Trollius Tropaeolaceae Tropaeolum Tropidia Tropidocarpum Tsuga Tuberaria Tuctoria Tuerckheimia Tulipa Tumamoca Turbina Turnera Turnera coerulea Turnera diffusa Turnera ulmifolia Turneraceae Turritis Tussilago Typha Typhaceae Ulmaceae Ulmus Ulota Ulota hutchinsiae Umbellularia Umbellularia californica Uniola Urena Urochloa Uropappus Urospermum Urtica Urtica dioica Urticaceae Uvularia Vaccaria Vaccinium Vaccinium erythrocarpum Vaccinium sect. Batodendron Vaccinium sect. Cyanococcus Vaccinium sect. Herpothamnus Vaccinium sect. Myrtillus Vaccinium sect. Oxycoccoides Vaccinium sect. Oxycoccus Vaccinium sect. Polycodium Vaccinium sect. Pyxothamnus Vaccinium sect. Vaccinium Vaccinium sect. Vitis-idaea Vahlodea Vallesia Vallisneria Vancouveria Vanilla Varilla Vaseyochloa Vauquelinia Vauquelinia californica Vauquelinia corymbosa Velezia Venegasia Ventenata Venturiella Venturiella sinensis Veratrum Veratrum album Veratrum californicum Veratrum viride Verbascum Verbascum lychnitis Verbascum phoeniceum Verbascum sinuatum Verbascum speciosum Verbascum thapsus Verbesina Vernicia Vernonia Veronica Veronica beccabunga Veronica wormskjoldii Veronicastrum Vesicularia Viguiera Villadia Vinca Vincetoxicum Viola Viola adunca Viola biflora Viola canadensis Viola epipsila Viola lobata Viola palmata Viola pedata Viola pinetorum Viola praemorsa Viola primulifolia Viola pubescens Viola purpurea Viola sagittata Viola tricolor Viola umbraticola Viola walteri Violaceae Viscaceae Viscum Viscum album Vitaceae Vitis Vitis cinerea Vitis rotundifolia Vitis subg. Muscadinia Vitis subg. Vitis Vittaria Vittariaceae Voitia Volutaria Voyria Vulpia Vulpia microstachys Vulpia octoflora Waldsteinia Waltheria Warea Warnstorfia Washingtonia Watsonia Websteria Wedelia Wedelia acapulcensis Weissia Whipplea Width Wijkia Wilhelmsia Willkommia Wislizenia Wissadula Wolffia Wolffiella Woodsia Woodsia obtusa Woodsia oregana Woodsia scopulina Woodwardia Wyethia Xanthisma Xanthisma grindelioides Xanthisma sect. Blepharodon Xanthisma sect. Havardii Xanthisma sect. Sideranthus Xanthisma sect. Xanthisma Xanthisma spinulosum Xanthisma texanum Xanthium Xanthocephalum Xanthorhiza Xerochrysum Xerophyllum Ximenia Ximenia americana Ximeniaceae Xylococcus Xylorhiza Xylorhiza tortifolia Xylosma Xyridaceae Xyris Xyris difformis Xyris laxifolia Xyris stricta Yermo Youngia Yucca Yucca angustissima Yucca baccata Yucca elata Yucca gloriosa Zaluzania Zamia Zamiaceae Zannichellia Zannichelliaceae Zea Zea mays Zelometeorium Zeltnera Zenobia Zephyranthes Zeuxine Zigadenus Zigadenus venenosus Zingiber Zingiberaceae Zinnia Zizania Zizania aquatica Zizania palustris Zizaniopsis Ziziphus Zostera Zosteraceae Zoysia Zuckia Zuckia brandegeei Zygodon Zygodon viridissimus Zygophyllaceae Zygophyllum ×achnella ×agropogon ×arctodupontia ×dupoa ×elyhordeum ×elyleymus ×leydeum ×pascoleymus ×pseudelymus ×pucciphippsia