| Senna orcuttii (Britton & Rose) H.S. Irwin & Barneby, 1979 |
| Senna oxyphylla (Kunth) H.S. Irwin & Barneby, 1982 |
| Senna pallida (Vahl) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. brachyrrhachis H.S. Irwin & Barneby, 1982 |
| Senna pallida var. cordillerae H.S. Irwin & Barneby, 1982 |
| Senna pallida var. delgadoana H.S. Irwin & Barneby, 1982 |
| Senna pallida var. gaumeri (Britton & Rose) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. geminiflora H.S. Irwin & Barneby, 1982 |
| Senna pallida var. goldmaniana H.S. Irwin & Barneby, 1982 |
| Senna pallida var. isthmica H.S. Irwin & Barneby, 1982 |
| Senna pallida var. lemniscata H.S. Irwin & Barneby, 1982 |
| Senna pallida var. longirostrata (Britton & Rose) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. macdougalliana H.S. Irwin & Barneby, 1982 |
| Senna pallida var. pallida (Vahl) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. palmeri (Britton) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. quiedondilla (Micheli) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. shreveana H.S. Irwin & Barneby, 1982 |
| Senna pallida var. trichocraspedon (Sandwith) H.S. Irwin & Barneby, 1982 |
| Senna pallida var. triquetripes H.S. Irwin & Barneby, 1982 |
| Senna papillosa (Britton & Rose) H.S. Irwin & Barneby, 1982 |