Centaurium pulchellum
Lesser Centaury
Centaurium scilloides
Perennial Centaury
Centranthus ruber
Red Valerian
Centratherum punctatum
Brazilian bachelor's button
Centrosema pubescens
Butterfly Pea
Cephalanthera damasonium
White Helleborine
Cephalanthera longifolia
Narrow-leaved Helleborine
Cephalanthera rubra
Red Helleborine
Cerastium alpinum
Alpine Mouse-ear
Cerastium arvense
Field Mouse-ear
Cerastium diffusum
Sea Mouse-ear
Cerastium fontanum
Common Mouse-ear
Cerastium glomeratum
Sticky Mouse-ear
Cerastium pumilum
Dwarf Mouse-ear
Cerastium semidecandrum
Little Mouse-ear
Cerastium tomentosum
Snow-in-summer
Cerastium x maureri
Ceratocapnos claviculata
Climbing Corydalis
Ceratophyllum demersum
Rigid Hornwort
Ceratostigma plumbaginoides
Plumbago
Cercidiphyllum japonicum
Katsura
Cercis siliquastrum
Judas-tree
Cereus hexagonus
Lady of the Night Cactus
Cestrum nocturnum
Night-blooming Jessamine
Chaenomeles japonica
Japanese Quince
Chaenorhinum minus
Small Toadflax
Chaenorhinum origanifolium
Malling Toadflax
Chaerophyllum temulum
Rough Chervil
Chamaecereus silvestri
Peanut Cactus
Chamaecyparis lawsoniana
Lawson's Cypress
Chamaecyparis obtusa
Hinoki Cypress
Chamaecyparis pisifera
Sawara Cypress
Chamaenerion angustifolium
Rosebay Willowherb
Chamelaucium uncinatum
Geraldton waxflower
Chara aspera
Rough Stonewort
Chara virgata
Delicate Stonewort
Chara vulgaris
Common Stonewort
Chelidonium majus
Greater Celandine
Chenopodiastrum murale
Nettle-leaved Goosefoot
Chenopodium album
Fat-hen
Chenopodium vulvaria
Stinking Goosefoot
Chloris barbata
Swollen Windmill-grass
Chlorophytum comosum
Spider-plant
Chlorophytum orchidastrum
Orange Spider Plant
Christia vespertilionis
Red Butterfly Wing
Chromolaena odorata
Devil Weed
Chrysanthemum indicum
Indian Chrysanthemum
Chrysophyllum cainito
Star Apple
Chrysosplenium
Chrysosplenium alternifolium
Alternate-leaved Golden-saxifrage
Chrysosplenium oppositifolium
Opposite-leaved Golden-saxifrage
Chrysothemis pulchella
Sunset Bells
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
Cirsium eriophorum
Woolly Thistle
Cirsium heterophyllum
Melancholy Thistle
Cirsium oleraceum
Cabbage Thistle
Cirsium palustre
Marsh Thistle
Cirsium vulgare
Spear Thistle
Cirsium x celakovskianum
Cissus verticillata
Princess Vine
Cistus
Rockrose
Cistus salviifolius
Sage-leaved Rock-rose
Cladium mariscus
Great Fen-sedge
Claytonia perfoliata
Springbeauty