| Caracalla pulcherrima Tod., 1861 |
| Carpopogon Roxb., 1832 |
| Carpopogon pruriens (L.) Roxb., 1814 |
| Carroa C. Presl, 1834 |
| Carroa diffusa (Moric.) C. Presl, 1858 |
| Carroa grandulosa C. Presl, 1858 |
| Cashalia Standl., 1923 |
| Cashalia cuscatlanica Standl., 1923 |
| Casparea Kunth, 1824 |
| Casparea amblyophylla (Harms) Britton & Rose, 1930 |
| Casparea aurita Griseb., 1860 |
| Casparea confusa (Rose) Britton & Rose, 1930 |
| Casparea congesta Britton & Rose, 1930 |
| Casparea coulteri (J.F. Macbr.) Britton & Rose, 1930 |
| Casparea deserti Britton & Rose, 1930 |
| Casparea dipetala (Hemsl.) Britton & Rose, 1930 |
| Casparea divaricata (L.) Britton & Rose, 1895 |
| Casparea furcata (Desv.) Jacks., 1895 |
| Casparea jenningsii (Paul G.Wilson) Britton & Rose, 1930 |
| Casparea jermyana Britton, 1930 |