Acanthocalycium chionanthum (Speg.) Backeb., Kaktus-ABC: 225. 1936 ["1935"] Acanthocalycium chionanthum (Speg.) Backeb., Kaktus-ABC: 225. 1936 ["1935"]is new combination for Echinocactus chionanthus Speg. in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 499. 1905Taxon for this nameAcanthocalycium chionanthum (Speg.) Backeb.