Calamus
Calico Aster
California Nettle
Callalily
Campion
Canada Bluegrass
Canada Cocklebur
Canada Germander
Canada Goldenrod
Canada Lettuce
Canada Mayflower
Canada Thistle
Canada Toadflax
Canada Wildrye
Canada Yew
Canadian Anemone
Canadian Blacksnakeroot
Canadian Clearweed
Canadian Gooseberry
Canadian Hawkweed
Canadian Honewort
Canadian Horseweed
Canadian Lousewort
Canadian Milkvetch
Canadian Plum
Canadian Pussytoes
Canadian Ricegrass
Canadian Rush
Canadian Summer Bluet
Canadian Waterweed
Canadian White Violet
Canadian Wildginger
Canadian Woodnettle
Canarygrass
Candle Anemone
Candytuft
Capsella
Caraway
Cardinalflower
Carelessweed
Carolina Anemone
Carolina Draba
Carolina Foxtail
Carolina Geranium