| Name |
Pronunciation |
Meaning |
| Cryptocoryne | | from the Greek krypto (hidden) and koryne (club); for the club-shaped spadix which is hidden in the spathe |
| Cryptomeria | | Greek krypto (hidden) and meris (a part); all the flower parts are hidden |
| Cunninghamia | | named for James Cunninghame, an 18th century surgeon in China |
| Cupressocyparis | | combination of Cupressus (cypress) and Chamaecyparis (greek for a genus of low-growing cypress) |
| Cyananthus | | from the Greek kyanos (blue) and anthus (flower); refers to the flower color |