Homalocephala polycephala (Engelm. & J.M. Bigelow) Vargas & Barcenas, 2018

Vargas-Luna, Mario Daniel, Hernandez-Ledesma, Patricia, Majure, Lucas Charles, uente-Martinez, Raul, cias, Hector Manuel Hernandez M & una, Rolando Tenoch Barcenas, 2018, Splitting Echinocactus: morphological and molecular evidence support the recognition of Homalocephala as a distinct genus in the Cacteae, PhytoKeys 111, pp. 31-59 : 47

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).