| Casparea subrotundifolia (Cav.) Kunth ex B.D. Jacks., 1893 |
| Casparea unguicularis (Benth. ex Hemsl.) Britton & Rose, 1930 |
| Casparea uniflora (S. Watson) Britton & Rose, 1930 |
| Casparea unilateralis (Britten & Baker f.) Britton & Rose, 1930 |
| Casparea versicolor (Bertol.) Britton & Rose, 1930 |
| Caspareopsis Britton & Rose, 1930 |
| Caspareopsis monandra (Kurz) Britton & Rose, 1930 |
| Caspareopsis purpurea (L.) Pittier, 1945 |
| Casparia Kunth, 1824 |
| Casparia calderonii Rose, 1930 |
| Casparia lunarioides A. Gray ex Britton & Rose, 1930 |
| Cassia L., 1753 |
| Cassia absus L., 1753 |
| Cassia acapulcensis Kunth, 1823 |
| Cassia alata L., 1753 |
| Cassia alata var. perennis Pamp., 1907 |
| Cassia alata var. rumphiana DC., 1825 |
| Cassia andrieuxii Benth., 1871 |
| Cassia anisopetala Donn. Sm., 1904 |
| Cassia annunciata E.H.L. Krause, 1914 |