Carex paniculata
Greater Tussock-sedge
Carex pendula
Pendulous Sedge
Carex strigosa
Thin-spiked Wood-sedge
Carex sylvatica
Wood-sedge
Carlina vulgaris
Carline Thistle
Carpinus betulus
Hornbeam
Carpobrotus edulis
Hottentot-fig
Carum carvi
Caraway
Cassia fistula
Golden Shower Tree
Castanea sativa
Sweet Chestnut
Casuarina equisetifolia
Coastal She-oak
Catapodium rigidum
Fern-grass
Cedrus deodara
Deodar
Centaurea cyanus
Cornflower
Centaurea scabiosa
Greater Knapweed
Centaurium portense
Perennial Centaury
Centaurium pulchellum
Lesser Centaury
Centaurium scilloides
Perennial Centaury
Centrosema pubescens
Butterfly Pea
Cephalanthera damasonium
White Helleborine
Cerastium alpinum
Alpine Mouse-ear
Cerastium pumilum
Dwarf Mouse-ear
Cerastium semidecandrum
Little Mouse-ear
Ceratocapnos claviculata
Climbing Corydalis
Cercis siliquastrum
Judas-tree
Chaenorhinum minus
Small Toadflax
Chaenorhinum origanifolium
Malling Toadflax
Chaerophyllum temulum
Rough Chervil
Chamaecyparis lawsoniana
Lawson's Cypress
Chamaenerion angustifolium
Rosebay Willowherb
Chara virgata
Delicate Stonewort
Chelidonium majus
Greater Celandine
Chloris barbata
Swollen Windmill-grass
Chlorociboria aeruginascens
Christia vespertilionis
Red Butterfly Wing
Chrysosplenium alternifolium
Alternate-leaved Golden-saxifrage
Chrysosplenium oppositifolium
Opposite-leaved Golden-saxifrage
Cichorium intybus
Chicory
Circaea alpina
Alpine Enchanter's-nightshade
Circaea x intermedia
Upland Enchanter's-nightshade
Cirsium acaule
Dwarf Thistle
Cirsium dissectum
Meadow Thistle
Cirsium eriophorum
Woolly Thistle
Cirsium palustre
Marsh Thistle
Cirsium vulgare
Spear Thistle
Cirsium x celakovskianum
Cladium mariscus
Great Fen-sedge
Cladonia coccifera
Cladonia macilenta
Cladonia portentosa
Clavulina rugosa
Clematis montana
Himalayan Clematis
Clematis vitalba
Traveller's-joy
Cleome spinosa
Spiny Spiderflower
Clinopodium acinos
Basil Thyme
Clinopodium ascendens
Common Calamint
Clinopodium vulgare
Wild Basil
Clitoria ternatea
Asian Pigeonwings
Coccinia grandis
Ivy Gourd
Cochlearia danica
Danish Scurvygrass
Cochlearia officinalis
Common Scurvygrass
Coeloglossum viride
Frog Orchid
Colchicum
Colchicum autumnale
Meadow Saffron
Coleus decurrens
Coleus
Comarum palustre
Marsh Cinquefoil
Combretum indicum
Rangoon Creeper
Commelina benghalensis
Benghal Dayflower
Commersonia bartramia
Conopodium majus
Pignut