Conium maculatum
Hemlock
Conocarpus erectus
Buttonwood
Convallaria majalis
Lily-of-the-valley
Coprinus comatus
Shaggy Inkcap
Coprinus picaceus
Magpie Inkcap
Corchorus aestuans
East Indian Jute Mallow
Corchorus olitorius
Jute Mallow
Cordyline fruticosa
Ti Plant
Coreopsis lanceolata
Lanceleaf Coreopsis
Corydalis solida
Bird-in-a-bush
Cosmos caudatus
King's Salad
Cosmos Sulphureus
Sulfur Cosmos
Costus dubius
Spiral Flag
Costus elegans
Stepladder Ginger
Costus guanaiensis
Spiral Ginger
Costus pictus
Painted Spiral Ginger
Cota tinctoria
Yellow Chamomile
Crassocephalum crepidioides
Redflower Ragleaf
Crataegus monogyna
Hawthorn
Crepis foetida
Stinking Hawk's-beard
Crepis vesicaria
Beaked Hawk's-beard
Crescentia cujete
Calabash Tree
Crinum jagus
Saint Christopher's Lily
Crossandra infundibuliformis
Firecracker Flower