Buxus sempervirens
Box
Caltha palustris
Marsh-marigold
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
Cleome viscosa
Asian Spider-flower
Coeloglossum viride
Frog Orchid
Coreopsis lanceolata
Lanceleaf Coreopsis
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