Echinocactus sileri Engelm. ex J.M.Coult. in Contr. U.S. Natl. Herb. 3(7): 376. 1896
Echinocactus sileri in Contr. U.S. Natl. Herb. 3(7): 376. 1896
is basionym for Pediocactus sileri in Cact. Succ. J. (Los Angeles) 33(2): 53. 1961
is basionym for Utahia sileri, Cactaceae 3: 215. 1922