| Cassia morelensis Greenm., 1903 |
| Cassia moschata Kunth, 1824 |
| Cassia multiflora M. Martens & Galeotti, 1843 |
| Cassia multifoliolata Paul G. Wilson, 1958 |
| Cassia multiglandulosa Jacq., 1783 |
| Cassia multijuga Rich., 1792 |
| Cassia nelsonii Rose, 1897 |
| Cassia nicaraguensis Benth., 1871 |
| Cassia nictitans L., 1753 |
| Cassia nutans Collad., 1816 |
| Cassia obtusifolia L., 1753 |
| Cassia occidentalis L., 1753 |
| Cassia orcuttii (Britton & Rose) B.L. Turner, 1949 |
| Cassia ovalifolia M. Martens & Galeotti, 1843 |
| Cassia pallida Vahl, 1807 |
| Cassia pallidior Rose, 1927 |
| Cassia palmeri S. Watson, 1887 |
| Cassia papillosa (Britton & Rose) Standl., 1933 |
| Cassia parahyba Vell., 1825 |
| Cassia parralensis H.S. Irwin & Barneby, 1975 |