| Canavalia rutilans DC., 1825 |
| Canavalia septentrionalis Sauer, 1964 |
| Canavalia villosa Benth., 1837 |
| Canavalia villosa var. glabra (M. Martens & Galeotti) Standl., 1936 |
| Cansenia Raf., 1838 |
| Cansenia ungulata (L.) Raf., 1838 |
| Caracalla Tod. ex Lem., 1862 |
| 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 |