Senna quinquangulata (Rich.) H.S. Irwin & Barneby Senna quinquangulata (Rich.) H.S. Irwin & Barneby, Mem. New York Bot. Gard. 35: 153. 1982 sec. Irwin & Barneby 1982≡Cassia quinquangulata Rich., Actes Soc. Hist. Nat. Paris 1: 108. 1792 syn. sec. Irwin & Barneby 1982