Coriandrum sativum
Coriander
Corydalis solida
Bird-in-a-bush
Cota tinctoria
Yellow Chamomile
Cotoneaster cambricus
Wild Cotoneaster
Cotoneaster horizontalis
Wall Cotoneaster
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Crassula helmsii
New Zealand Pigmyweed
Crepis vesicaria
Beaked Hawk's-beard
Crocosmia x crocosmiiflora
Montbretia
Crocus neapolitanus
Spring Crocus
Crocus nudiflorus
Autumn Crocus
Crocus speciosus
Bieberstein's Crocus
Crocus tommasinianus
Early Crocus
Crocus x luteus
Yellow Crocus
Cryptomeria japonica
Japanese Red-cedar
Cyclamen coum
Eastern Sowbread
Cyclamen hederifolium
Sowbread
Cydonia oblonga
Quince
Cymbalaria muralis
Ivy-leaved Toadflax
Cynara cardunculus
Cardoon
Cyrtomium fortunei
Fortune's cyrtomium
Darmera peltata
Indian-rhubarb
Datura stramonium
Thorn-apple
Dicentra formosa
Bleeding-heart