Cardamine flexuosa
Wavy Bitter-cress
Carex riparia
Greater Pond-sedge
Carlina vulgaris
Carline Thistle
Cassia artemisioides
Feathery Cassia
Castanea sativa
Sweet Chestnut
Ceratocapnos claviculata
Climbing Corydalis
Chelidonium majus
Greater Celandine
Chrysosplenium alternifolium
Alternate-leaved Golden-saxifrage
Chrysosplenium oppositifolium
Opposite-leaved Golden-saxifrage
Cirsium oleraceum
Cabbage Thistle
Clematis serratifolia
Korean Clematis
Coeloglossum viride
Frog Orchid
Crepis capillaris
Smooth Hawk's-beard
Crepis foetida
Stinking Hawk's-beard
Crocus x luteus
Yellow Crocus
Cruciata laevipes
Crosswort
Cypripedium calceolus
Lady's-slipper
Cytisus scoparius
Broom
Diplotaxis muralis
Annual Wall-rocket
Doronicum pardalianches
Leopard's-bane
Draba aizoides
Yellow Whitlowgrass
Eranthis hyemalis
Winter Aconite
Erigeron canadensis
Canadian Fleabane
Eryngium campestre
Field Eryngo