Cirsium x celakovskianum
Cissus verticillata
Princess Vine
Cistus
Rockrose
Cistus salviifolius
Sage-leaved Rock-rose
Cladium mariscus
Great Fen-sedge
Claytonia perfoliata
Springbeauty
Claytonia sibirica
Pink Purslane
Clematis cirrhosa
Early Virgin's-bower
Clematis montana
Himalayan Clematis
Clematis rehderiana
Clematis serratifolia
Korean Clematis
Clematis sp.
Clematis vitalba
Traveller's-joy
Clematis x durandii
Clematis (x#durandii)
Cleome rutidosperma
Fringed Spider Flower
Cleome viscosa
Asian Spiderflower
Clerodendron chinensis
Glory Bower
Clerodendron paniculatum
Pagoda Flower
Clinopodium acinos
Basil Thyme
Clinopodium ascendens
Common Calamint
Clinopodium vulgare
Wild Basil
Clitoria ternatea
Asian Pigeonwings
Clivia spp.
Cnidoscolus aconitifolius
Chaya