| 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 |
| Cassia densiflora M. Martens & Galeotti, 1843 |
| Cassia desvauxii Collad., 1816 |
| Cassia desvauxii var. mollissima Benth., 1870 |
| Cassia didymobotrya Fresen., 1839 |
| Cassia diphylla L., 1753 |
| Cassia disadena Steud., 1843 |
| Cassia doylei (Britton & Rose) Lundell, 1937 |
| Cassia dumetorum Bertero ex DC., 1825 |
| Cassia durangensis Rose, 1906 |
| Cassia durangensis var. durangensis Rose, 1906 |
| Cassia durangensis var. iselyi H.S. Irwin & Barneby, 1975 |
| Cassia ekmaniana Urb., 1928 |
| Cassia elliptica Kunth, 1824 |