Echinocactus smithii Muehlenpf. in Allg. Gartenzeitung 14: 370. 1846
Echinocactus smithii in Allg. Gartenzeitung 14: 370. 1846
is basionym for Pediocactus smithii in Acta Mus. Richnov., Sect. Nat., 5: 19. 1998
is basionym for Gymnocactus beguinii var. smithii, Cactaceae 5: 2855. 1961
is basionym for Neolloydia smithii in Krainz, Kakteen 46–47: CVIII b. 1971
is basionym for Thelocactus smithii, Cacti, ed. 2: 346. 1951