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Scientific Name Common Name(s) Plant Category Image
Chamaesyce serpens Creeping spurge Annuals
Cheiranthus cheiri Wallflower Annuals
Chenopodium album Bacon weed, Fat hen, Goosefoot, Lambsquarters, Pigweed Annuals, Edible Plants
Cirsium Cirsium, Plume thistle Annuals
Clarkia hybrids Farwell to-spring, Godetia, Rocky Mountain garland Annuals
Cleome hassleriana Cleome, Spider flower Annuals
Clerondendron ugandens Blue butterfly bush Annuals
Coleus pumilus Trailing coleus Annuals
Coleus x hybridus Coleus Annuals
Colocasia spp. Dasheen, Elephant's-ear, Taro Annuals, Poisonous Plants
Convolulus tricolor Dwarf morning glory Annuals
Conyza canadensis (L.) Horse weed, Horseweed, Marestail Annuals, Herbs
Coreopsis tinctoria Garden coreopsis, Golden coreopsis, Tick-seed Annuals, Wildflowers
Cosmos bipinnatus Garden cosmos, Tall cosmos Annuals
Cosmos spp. Cosmos Annuals
Cosmos sulphureus Klondike cosmos, Orange cosmos, Sulphur cosmos Annuals
Crassocephalum crepidioides Redflower ragweed, Thickhead Annuals, Herbs
Cuphea hyssopifolia Mexican heather Annuals
Cuphea ignea Firecracker plant, Mexican cigar plant Annuals
Cuphea llavea False heather, Red cuphea Annuals
Cyclospermum leptophyllum Marsh parsley Annuals, Herbs
Cynara cardunculus Cardoon Annuals, Edible Plants
Cynoglossum amabile Chinese forget-me not, Hound's tongue Annuals
Dahlia hortensis Dahlia Annuals, Poisonous Plants
Datura innoxia Downy thorn apple Annuals