| Option ID | Family Name | Notes | Metadata ID |
| 81 | Caricaceae | Angiosperms (Flowering plants) | 1,591 |
| 82 | Carlemanniaceae | Angiosperms (Flowering plants) | 1,591 |
| 83 | Caryocaraceae | Angiosperms (Flowering plants) | 1,591 |
| 84 | Caryophyllaceae | Angiosperms (Flowering plants) | 1,591 |
| 85 | Casuarinaceae | Angiosperms (Flowering plants) | 1,591 |
| 86 | Celastraceae | Angiosperms (Flowering plants) | 1,591 |
| 87 | Centrolepidaceae | Angiosperms (Flowering plants) | 1,591 |
| 88 | Centroplacaceae | Angiosperms (Flowering plants) | 1,591 |
| 89 | Cephalotaceae | Angiosperms (Flowering plants) | 1,591 |
| 90 | Ceratophyllaceae | Angiosperms (Flowering plants) | 1,591 |
| 91 | Cercidiphyllaceae | Angiosperms (Flowering plants) | 1,591 |
| 92 | Chloranthaceae | Angiosperms (Flowering plants) | 1,591 |
| 93 | Chrysobalanaceae | Angiosperms (Flowering plants) | 1,591 |
| 94 | Circaeasteraceae | Angiosperms (Flowering plants) | 1,591 |
| 95 | Cistaceae | Angiosperms (Flowering plants) | 1,591 |
| 96 | Cleomaceae | Angiosperms (Flowering plants) | 1,591 |
| 97 | Clethraceae | Angiosperms (Flowering plants) | 1,591 |
| 98 | Clusiaceae | Angiosperms (Flowering plants) | 1,591 |
| 99 | Colchicaceae | Angiosperms (Flowering plants) | 1,591 |
| 100 | Columelliaceae | Angiosperms (Flowering plants) | 1,591 |