| Label | Id | |
|---|---|---|
| Clemelis | 1918222 | |
| Clencharia | 1222189 | |
| Coelodonta | 222862 | |
| Colastomion | 322248 | |
| Conobregma | 322252 | |
| Corispermoideae | 1843222 | |
| Cornuvesica | 222542 | |
| Corynis | 222787 | |
| Cratospila | 322254 | |
| Crossopsoraceae | 2792225 | |
| Ctenochares | 494222 | |
| Curtisiaceae | 42220 | |
| Cylorygmus | 1542225 | |
| Cypselurus | 123222 | |
| Cyrtanthus | 82224 |