| Senna andrieuxii (Benth.) H.S. Irwin & Barneby, 1982 |
| Senna apiculata (M. Martens & Galeotti) H.S. Irwin & Barneby, 1982 |
| Senna apiculata var. apiculata (M. Martens & Galeotti) H.S. Irwin & Barneby, 1982 |
| Senna apiculata var. longipes H.S. Irwin & Barneby, 1982 |
| Senna argentea (Kunth) H.S. Irwin & Barneby, 1982 |
| Senna arida (Rose) H.S. Irwin & Barneby, 1982 |
| Senna armata (S. Watson) H.S. Irwin & Barneby, 1982 |
| Senna atomaria (L.) H.S. Irwin & Barneby, 1982 |
| Senna bacillaris (L. f.) H.S. Irwin & Barneby, 1982 |
| Senna bauhinioides (A. Gray) H.S. Irwin & Barneby, 1979 |
| Senna bicapsularis (L.) Roxb., 1832 |
| Senna centranthera H.S. Irwin & Barneby, 1982 |
| Senna cobanensis (Britton & Rose) H.S. Irwin & Barneby, 1982 |
| Senna confinis (Greene) H.S. Irwin & Barneby, 1982 |
| Senna covesii (A. Gray) H.S. Irwin & Barneby, 1979 |
| Senna crotalarioides (Kunth) H.S. Irwin & Barneby, 1979 |
| Senna demissa (Rose) H.S. Irwin & Barneby, 1979 |
| Senna demissa var. demissa (Rose) H.S. Irwin & Barneby, 1979 |
| Senna demissa var. radicans (H.S. Irwin & Barneby) H.S. Irwin & Barneby, 1979 |
| Senna didymobotrya (Fresen.) H.S. Irwin & Barneby, 1982 |