Homalocephala polycephala (Engelm. & J.M. Bigelow) Vargas & Barcenas comb. nov.

Echinocactus polycephalus Engelm. & J.M. Bigelow, Proc. Amer. Acad. Arts 3: 276. 1857.

Type.

U.S.A., California, Mohave Valley, Bigelow s/n., 8 Mar 1854 (lectotype, designated by Chamberland, Syst. Bot. 22: 311. 1997: MO 2017480).