Cedrus libani
Cedar-of-Lebanon
Centaurea scabiosa
Greater Knapweed
Centaurium littorale
Seaside Centaury
Centaurium portense
Perennial Centaury
Centratherum punctatum
Brazilian bachelor's button
Centrosema pubescens
Butterfly Pea
Cephalanthera damasonium
White Helleborine
Cerastium fontanum
Common Mouse-ear
Cerastium semidecandrum
Little Mouse-ear
Ceratocapnos claviculata
Climbing Corydalis
Ceratophyllum demersum
Rigid Hornwort
Ceratostigma plumbaginoides
Cercidiphyllum japonicum
Katsura
Cestrum nocturnum
Night-blooming Jessamine
Chaenorhinum minus
Small Toadflax
Chaenorhinum origanifolium
Malling Toadflax
Chaerophyllum temulum
Rough Chervil
Chamaecyparis lawsoniana
Lawson's Cypress
Chamaecyparis obtusa
Hinoki Cypress
Chamaenerion angustifolium
Rosebay Willowherb
Chara virgata
Delicate Stonewort
Chelidonium majus
Greater Celandine
Chenopodium vulvaria
Stinking Goosefoot
Chlorophytum orchidastrum
Orange Spider Plant