Oxalis tetraphylla Cav., Icon. 3: 19-20, pl. 237. 1794 sec. Sidwell 2011
- =Ionoxalis cuernavacana Rose in Contr. U.S. Natl. Herb. 10(3): 111. 1906 syn. sec. Sidwell 2011
- =Ionoxalis tetraphylla (Cav.) Rose in Contr. U.S. Natl. Herb. 10(3): 115. 1906 syn. sec. The Plant List 2013
- =Ionoxalis divaricata Small, N. Amer. Fl. 25(1): 33. 1907 syn. sec. Sidwell 2011
- =Ionoxalis scopulorum Rose, N. Amer. Fl. 25(1): 33. 1907 syn. sec. The Plant List 2013
- =Oxalis hayi R. Knuth in Notizbl. Bot. Gart. Berlin-Dahlem 7(67): 316. 1919 syn. sec. The Plant List 2013