Clematis vitalba
Traveller's-joy
Clinopodium acinos
Basil Thyme
Clinopodium ascendens
Common Calamint
Clinopodium vulgare
Wild Basil
Clitoria ternatea
Asian Pigeonwings
Coccinia grandis
Ivy Gourd
Cochlearia danica
Danish Scurvygrass
Cochlearia officinalis
Common Scurvygrass
Coeloglossum viride
Frog Orchid
Colchicum
Colchicum autumnale
Meadow Saffron
Coleus decurrens
Coleus
Comarum palustre
Marsh Cinquefoil
Combretum indicum
Rangoon Creeper
Commelina benghalensis
Benghal Dayflower
Commersonia bartramia
Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Convolvulus arvensis
Field Bindweed
Coprinus niveus
Snowy Inkcap
Cornus capitata
Bentham's Dogwood
Corylus avellana
Hazel
Costus pictus
Painted Spiral Ginger
Cotoneaster integrifolius
Entire-leaved Cotoneaster