Senna durangensis (Rose) H.S. Irwin & Barneby Senna durangensis (Rose) H.S. Irwin & Barneby, Phytologia 44: 499. 1979 sec. Irwin & Barneby 1982≡Cassia durangensis Rose, Contr. U.S. Natl. Herb. 10: 98. 1906 syn. sec. Irwin & Barneby 1982