Common name (English)
Casuarina glauca Swamp oak
Catalpa bignonioides Catawba, American catalpa
Catharanthus roseus Madagascar periwinkle, Billygoat Weed
Cedrus atlantica Atlantic cedar, Atlas Cedar
Cedrus deodara Deodar
Cedrus libani Cedar of Lebanon
Ceiba pentandra Kapok
Ceiba speciosa Floss-silktree, Silk Floss Tree
Celtis australis European nettle tree, European Hackberry
Cenchrus clandestinus Kikuyo Grass
Cenchrus purpureus Napier grass, Elephant grass
Cenchrus setaceus African Fountain Grass
Cercis siliquastrum Judas tree, Red Bud
Cestrum nocturnum Night Jessamine, Queen of the Night, Night-blooming Cestrum
Chasmanthe aethiopica
Chilopsis linearis Desert willow
Clematis vitalba Old man's beard
Cordyline cannifolia Canna-leaved Palm-lily
Corylus avellana Common hazel, Barcelona-nuts
Cosmos bipinnatus Cosmos; Mexican aster