Cornus capitata
Bentham's Dogwood
Corrigiola litoralis
Strapwort
Corydalis solida
Bird-in-a-bush
Corylus avellana
Hazel
Costus dubius
Spiral Flag
Costus elegans
Stepladder Ginger
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crataegus laevigata
Midland Hawthorn
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crepis vesicaria
Beaked Hawk's-beard
Crinum jagus
Saint Christopher's Lily
Crocosmia x crocosmiiflora
Montbretia
Crocus tommasinianus
Early Crocus
Crotalaria pallida
Crotalaria
Croton bonplandianus
Cruciata laevipes
Crosswort
Cyanthillium cinereum
Little Ironweed
Cymbidium ensifolium
Four-season Orchid
Cynoglossum officinale
Hound's-tongue
Cynosurus cristatus
Crested Dog's-tail
Cyperus brevifolia