| 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 |
| Cassia apiculata M. Martens & Galeotti, 1843 |
| Cassia arborescens Mill., 1768 |
| Cassia argentea Kunth, 1824 |
| Cassia arida Rose, 1906 |
| Cassia armata S. Watson, 1879 |
| Cassia articulata Rose, 1909 |
| Cassia atomaria L., 1767 |
| Cassia atomaria var. glabrata Benth., 1871 |
| Cassia aurivilla Mart. ex Benth., 1870 |
| Cassia axillaris Sessé & Moc., 1893 |
| Cassia babylonica Schrank, 1805 |
| Cassia bacillaris L. f., 1782 |
| Cassia bauhinioides A. Gray, 1850 |