| Cassia botteriana Benth., 1871 |
| Cassia brachiata (Pollard) J.F. Macbr., 1919 |
| Cassia bracteata L. f., 1781 |
| Cassia brittoniana Lundell, 1937 |
| Cassia calycioides DC. ex Collad., 1816 |
| Cassia chamaecrista L., 1753 |
| Cassia chamaecristoides Collad., 1816 |
| Cassia chiapensis Standl., 1919 |
| Cassia cinerea Schltdl. & Cham., 1830 |
| Cassia cobanensis (Britton & Rose) Lundell, 1937 |
| Cassia coluteoides Collad., 1816 |
| Cassia confinis Greene, 1897 |
| Cassia corymbosa Ortega, 1800 |
| Cassia covesii A. Gray, 1868 |
| Cassia crotalarioides Kunth, 1822 |
| Cassia cubensis Schery, 1951 |
| Cassia deamii (Britton & Rose) Lundell, 1937 |
| Cassia demissa Rose, 1906 |
| Cassia demissa var. demissa Rose, 1906 |
| Cassia demissa var. radicans H.S. Irwin & Barneby, 1975 |