Circaea alpina
Alpine Enchanter's-nightshade
Circaea lutetiana
Enchanter's-nightshade
Circaea x intermedia
Upland Enchanter's-nightshade
Cirsium acaule
Dwarf Thistle
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
Claytonia sibirica
Pink Purslane
Clematis montana
Himalayan Clematis
Clematis vitalba
Traveller's-joy
Clinopodium acinos
Basil Thyme
Clinopodium ascendens
Common Calamint
Clinopodium vulgare
Wild Basil
Clivia spp.
Cnidoscolus aconitifolius
Chaya
Cochlearia danica
Danish Scurvygrass
Cochlearia officinalis
Common Scurvygrass
Cochlearia officinalis agg
Common Scurvygrass