Pyrrhocactus setiflorus Backeb., Descr. Cact. Nov. 3: 13. 1963 Pyrrhocactus setiflorus Backeb., Descr. Cact. Nov. 3: 13. 1963is basionym for Neoporteria setiflora (Backeb.) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 58. 1966Taxon for this namePyrrhocactus setiflorus Backeb.