Senna hayesiana (Britton & Rose) H.S. Irwin & Barneby, Mem. New York Bot. Gard. 35: 133. 1982 sec. Irwin & Barneby 1982
- ≡Chamaefistula hayesiana Britton & Rose, N. Amer. Fl. 23(4): 235. 1930 syn. sec. Irwin & Barneby 1982
- ≡Cassia hayesiana (Britton & Rose) Standl., Contr. Arnold Arbor. 5: 75. 1933 syn. sec. Irwin & Barneby 1982
- =Cassia inaequilatera Ram. Goyena, Fl. Nicarag. 1: 367. 1909 syn. sec. Irwin & Barneby 1982
- =Chamaefistula chiapensis Britton & Rose, N. Amer. Fl. 23(4): 238. 1930 syn. sec. Irwin & Barneby 1982
- =Chamaefistula lanata Britton & Rose, N. Amer. Fl. 23(4): 237. 1930 syn. sec. Irwin & Barneby 1982
- =Chamaefistula membranacea Britton & Rose, N. Amer. Fl. 23(4): 236. 1930 syn. sec. Irwin & Barneby 1982
- =Chamaefistula standleyi Britton & Rose, N. Amer. Fl. 23(4): 238. 1930 syn. sec. Irwin & Barneby 1982
- =Chamaefistula subpilosa Britton & Rose, N. Amer. Fl. 23(4): 235. 1930 syn. sec. Irwin & Barneby 1982
- =Chamaefistula valerioi Britton & Rose, N. Amer. Fl. 23(4): 236. 1930 syn. sec. Irwin & Barneby 1982
- =Cassia brittoniana Lundell, Phytologia 1: 214. 1937 syn. sec. Irwin & Barneby 1982
- =Cassia standleyi (Britton & Rose) Standl., Publ. Field Mus. Nat. Hist., Bot. 18: 518. 1937 syn. sec. Irwin & Barneby 1982