Cornus capitata
Bentham's Dogwood
Corylus avellana
Hazel
Costus elegans
Stepladder Ginger
Costus pictus
Painted Spiral Ginger
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crepis capillaris
Smooth Hawk's-beard
Crithmum maritimum
Rock Samphire
Crocosmia x crocosmiiflora
Montbretia
Crocus laevigatus
Crocus (laevigatus)
Crocus neapolitanus
Spring Crocus
Crocus sativus
Saffron Crocus
Crocus tommasinianus
Early Crocus
Crossandra infundibuliformis
Firecracker Flower
Crotalaria pallida
Crotalaria
Cruciata laevipes
Crosswort
Cryptogramma crispa
Parsley Fern
Cuphea hyssopifolia
False Heather
Cuscuta epithymum
Dodder
Cycas circinalis
Queen Sago