Cirsium arvense
Creeping Thistle
Cirsium dissectum
Meadow Thistle
Cirsium eriophorum
Woolly Thistle
Cirsium oleraceum
Cabbage Thistle
Cirsium palustre
Marsh Thistle
Cirsium vulgare
Spear Thistle
Cirsium x celakovskianum
Cladium mariscus
Great Fen-sedge
Claytonia perfoliata
Springbeauty
Clinopodium ascendens
Common Calamint
Clinopodium vulgare
Wild Basil
Cochlearia officinalis agg
Common Scurvygrass
Cochlearia officinalis agg.
Scurvygrass
Coeloglossum viride
Frog Orchid
Comarum palustre
Marsh Cinquefoil
Conium maculatum
Hemlock
Conopodium majus
Pignut
Convallaria majalis
Lily-of-the-valley
Cornus capitata
Bentham's Dogwood
Corrigiola litoralis
Strapwort
Corydalis solida
Bird-in-a-bush
Corylus avellana
Hazel
Couroupita guianensis
Cannonball tree
Crambe maritima
Sea-kale