Cotoneaster horizontalis
Wall Cotoneaster
Cotoneaster integrifolius
Entire-leaved Cotoneaster
Cotoneaster melanocarpus
Cotoneaster tomentosus
Cotoneaster (tomentosus)
Crambe maritima
Sea-kale
Crassula helmsii
New Zealand Pigmyweed
Crataegus laevigata
Midland Hawthorn
Crataegus monogyna
Hawthorn
Crataegus rhipidophylla
Crepis biennis
Rough Hawk's-beard
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crepis vesicaria
Beaked Hawk's-beard
Crithmum maritimum
Rock Samphire
Cruciata laevipes
Crosswort
Cucurbita pepo
Marrow
Cuscuta epithymum
Dodder
Cuscuta europaea
Greater Dodder
Cyclamen coum
Eastern Sowbread
Cyclamen hederifolium
Sowbread
Cydonia oblonga
Quince
Cymbalaria muralis
Ivy-leaved Toadflax
Cynara cardunculus
Cardoon
Cynoglossum officinale
Hound's-tongue