| Label | Id | |
|---|---|---|
| Cliffortia | 137437 | |
| Cliftonia | 55374 | |
| Cnaphalocrocis | 437487 | |
| Coelopleurus | 337419 | |
| Colapteroblatta | 1383748 | |
| Coleanthus | 1176374 | |
| Conandrena | 337470 | |
| Conopoidea | 43744 | |
| Conothamnus | 73744 | |
| Consolida | 37493 | |
| Cophomantini | 374050 | |
| Copromyzinae | 137480 | |
| Cruziohyla | 374087 | |
| Cryogorgia | 637400 | |
| Cylindrocladiella | 137494 |