Echinocactus polycephalus var. xeranthemoides J.M.Coult. in Contr. U.S. Natl. Herb. 3: 358. 1896
Echinocactus polycephalus var. xeranthemoides in Contr. U.S. Natl. Herb. 3: 358. 1896
is basionym for Homalocephala polycephala subsp. xeranthemoides in PhytoKeys 111: 49. 2018
is basionym for Echinocactus polycephalus subsp. xeranthemoides in Cactaceae Consensus Init. 5: 12. 1998
is basionym for Echinocactus xeranthemoides, Fl. Rocky Mts.: 579. 1917
is basionym for Emorycactus xeranthemoides in Succulenta (Netherlands) 75: 270. 1996
is basionym for Echinocactus xeranthemoides, Gesamtbeschr. Kakt.: 452. 1897–1899