Centaurea scabiosa
Greater Knapweed
Centaurium portense
Perennial Centaury
Centaurium scilloides
Perennial Centaury
Centranthus ruber
Red Valerian
Cephalanthera damasonium
White Helleborine
Cephalanthera longifolia
Narrow-leaved Helleborine
Cephalanthera rubra
Red Helleborine
Cerastium alpinum
Alpine Mouse-ear
Cerastium arvense
Field Mouse-ear
Cerastium fontanum
Common Mouse-ear
Cerastium tomentosum
Snow-in-summer
Ceratophyllum demersum
Rigid Hornwort
Chamaecyparis lawsoniana
Lawson's Cypress
Chamaenerion angustifolium
Rosebay Willowherb
Chelidonium majus
Greater Celandine
Chrysosplenium alternifolium
Alternate-leaved Golden-saxifrage
Chrysosplenium oppositifolium
Opposite-leaved Golden-saxifrage
Cichorium intybus
Chicory
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