Carex x gaudiniana
Carex x prolixa
A Hybrid Sedge
Carlina vulgaris
Carline Thistle
Carpinus betulus
Hornbeam
Carpobrotus edulis
Hottentot-fig
Cascabela thevetia
Yellow Oleander
Cassia fistula
Golden Shower Tree
Castanea sativa
Sweet Chestnut
Castilla elastica
Panama Rubber Tree
Casuarina equisetifolia
Coastal She-oak
Catabrosa aquatica
Whorl-grass
Catapodium rigidum
Fern-grass
Cedrus atlantica
Atlas Cedar
Cedrus deodara
Deodar
Cedrus libani
Cedar-of-Lebanon
Cenchrus setosus
Mission Grass
Centaurea debeauxii
Slender Knapweed
Centaurea montana
Perennial Cornflower
Centaurea nigra
Common Knapweed
Centaurea scabiosa
Greater Knapweed
Centaurium erythraea
Common Centaury
Centaurium littorale
Seaside Centaury
Centaurium portense
Perennial Centaury
Centaurium pulchellum
Lesser Centaury