| Senna hirsuta var. leptocarpa (Benth.) H.S. Irwin & Barneby, 1982 |
| Senna holwayana (Rose) H.S. Irwin & Barneby, 1982 |
| Senna holwayana var. holwayana (Rose) H.S. Irwin & Barneby, 1982 |
| Senna insularis (Britton & Rose) H.S. Irwin & Barneby, 1982 |
| Senna juchitanensis Saynes & R. Torres, 2019 |
| Senna koelziana H.S. Irwin & Barneby, 1982 |
| 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 |