This name is a synonym of Emorycactus xeranthemoides (J.M.Coult.) Doweld.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 5105300) with original publication details: Fl. Rocky Mts. 579 1917.
⥇ A cross-taxon basionym link was ignored while processing this record,
see Echinocactus polycephalus var. xeranthemoides J.M.Coult..
This name was in version 1 of The Plant List, record tro-5105300.