Echinocactus whipplei var. spinosior Engelm. in Trans. Acad. Sci. St. Louis 2: 199. 1863
Echinocactus whipplei var. spinosior in Trans. Acad. Sci. St. Louis 2: 199. 1863
is basionym for Sclerocactus spinosior in Cact. Succ. J. (Los Angeles) 48(3): 131. 1976
is basionym for Ferocactus spinosior in Cact. Succ. J. Gr. Brit. 41: 90. 1979
is basionym for Sclerocactus pubispinus var. spinosior in Great Basin Naturalist 44(1): 67. 1984
is basionym for Pediocactus spinosior in Acta Mus. Richnov., Sect. Nat., 5(1): 16. 1998