Echinocactus brachypetalus (Speg.) Werderm. in Backeberg, Neue Kakteen: 89. 1931 Echinocactus brachypetalus (Speg.) Werderm. in Backeberg, Neue Kakteen: 89. 1931is new combination for Gymnocalycium brachypetalum Speg. in Anales Soc. Ci. Argent. 99: 135. 1925Taxon for this nameEchinocactus brachypetalus (Speg.) Werderm.