Semantic search
- Callitriche stenoptera
- Calopogon tuberosus var. tuberosus
- Caltha natans
- Caltha palustris
- Calypso bulbosa var. americana
- Camassia scilloides
- Camelina microcarpa
- Camelina sativa
- Campyliadelphus chrysophyllus
- Campylium protensum
- Campylium stellatum
- Campylophyllum hispidulum
- Campylophyllum sommerfeltii
- Canadanthus modestus
- Capsella bursa-pastoris
- Cardamine bulbosa
- Cardamine concatenata
- Cardamine diphylla
- Cardamine douglassii
- Cardamine flexuosa
- Cardamine hirsuta
- Cardamine impatiens
- Cardamine maxima
- Cardamine parviflora
- Cardamine pensylvanica
- Cardamine pratensis
- Carduus acanthoides
- Carduus acanthoides subsp. acanthoides
- Carduus crispus
- Carduus nutans
- Carex acutiformis
- Carex adusta
- Carex aggregata
- Carex alata
- Carex albicans
- Carex albicans var. albicans
- Carex albicans var. emmonsii
- Carex albursina
- Carex alopecoidea
- Carex amphibola
- Carex annectens
- Carex appalachica
- Carex aquatilis
- Carex aquatilis var. aquatilis
- Carex aquatilis var. substricta
- Carex arcta
- Carex arctata
- Carex argyrantha
- Carex assiniboinensis
- Carex atherodes