| Senna leiophylla (Vogel) H.S. Irwin & Barneby, 1982 |
| Senna lindheimeriana (Scheele) H.S. Irwin & Barneby, 1979 |
| Senna mensicola (H.S. Irwin & Barneby) H.S. Irwin & Barneby, 1979 |
| Senna mexicana (Jacq.) H.S. Irwin & Barneby, 1982 |
| Senna mexicana var. mexicana (Jacq.) H.S. Irwin & Barneby, 1982 |
| Senna mollissima (Willd.) H.S. Irwin & Barneby, 1982 |
| Senna mollissima var. glabrata (Benth.) H.S. Irwin & Barneby, 1982 |
| Senna monozyx (H.S. Irwin & Barneby) H.S. Irwin & Barneby, 1979 |
| Senna multifoliolata (Paul G. Wilson) H.S. Irwin & Barneby, 1982 |
| Senna multifoliolata var. eurystegia H.S. Irwin & Barneby, 1982 |
| Senna multifoliolata var. metaxi H.S. Irwin & Barneby, 1982 |
| Senna multifoliolata var. mimetes H.S. Irwin & Barneby, 1982 |
| Senna multifoliolata var. multifoliolata (Paul G. Wilson) H.S. Irwin & Barneby, 1982 |
| Senna multiglandulosa (Jacq.) H.S. Irwin & Barneby, 1982 |
| Senna multijuga (Rich.) H.S. Irwin & Barneby, 1982 |
| Senna multijuga subsp. doylei (Britton & Rose) H.S. Irwin & Barneby, 1982 |
| Senna multijuga subsp. multijuga (Rich.) H.S. Irwin & Barneby, 1982 |
| Senna nicaraguensis (Benth.) H.S. Irwin & Barneby, 1982 |
| Senna obtusifolia (L.) H.S. Irwin & Barneby, 1982 |
| Senna occidentalis (L.) Link, 1831 |