Colchicum alpinum
Alpine Saffron
Colchicum autumnale
Meadow Saffron
Comarum palustre
Marsh Cinquefoil
Conium maculatum
Hemlock
Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Convolvulus arvensis
Field Bindweed
Coreopsis lanceolata
Lanceleaf Coreopsis
Coriandrum sativum
Coriander
Cornus capitata
Bentham's Dogwood
Cornus sanguinea
Dogwood
Corrigiola litoralis
Strapwort
Corydalis solida
Bird-in-a-bush
Corylus avellana
Hazel
Cosmos caudatus
King's Salad
Cota tinctoria
Yellow Chamomile
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Cotoneaster melanocarpus
Cotoneaster tomentosus
Cotoneaster (tomentosus)
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale
Crassocephalum crepidioides
Redflower Ragleaf
Crassula helmsii
New Zealand Pigmyweed
Crataegus laevigata
Midland Hawthorn