| Cibotarium macropetalum Rollins, 1941 |
| Cibotarium macrum (Standl.) Rollins, 1941 |
| Cibotarium microcarpum Rollins, 1957 |
| Cibotarium stellatum (S. Watson) O.E. Schulz, 1933 |
| Clandestinaria (DC.) Spach, 1838 |
| Clypeola L., 1753 |
| Clypeola maritima L., 1753 |
| Cochlearia L., 1753 |
| Cochlearia draba L., 1759 |
| Cochlearia mexicana S. Watson, 1882 |
| Cochlearieae Buchenau, 1894 |
| Coelonema Maxim., 1880 |
| Coelophragmus O.E. Schulz, 1924 |
| Coelophragmus auriculatus (A. Gray) O.E. Schulz, 1924 |
| Coelophragmus umbrosus (B. L. Rob.) O.E. Schulz, 1924 |
| Coluteocarpeae V.I. Dorof., 2004 |
| Conringia Heist. ex Fabr., 1759 |
| Conringia orientalis (L.) Dumort., 1827 |
| Conringieae D.A. German & Al-Shehbaz, 2008 |
| Coronopus Zinn, 1757 |