| 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 |
| Senna durangensis (Rose) H.S. Irwin & Barneby, 1979 |
| Senna durangensis var. durangensis (Rose) H.S. Irwin & Barneby, 1979 |
| Senna durangensis var. iselyi (H.S. Irwin & Barneby) H.S. Irwin & Barneby, 1979 |
| Senna exigua Roxb., 1832 |
| Senna foetidissima (Sessé & Moc. ex G. Don) H.S. Irwin & Barneby, 1982 |
| Senna foetidissima var. foetidissima (Sessé & Moc. ex G. Don) H.S. Irwin & Barneby, 1982 |