Pyrrhocactus setosiflorus Backeb., Cactaceae 6: 3745. 1962 Pyrrhocactus setosiflorus Backeb., Cactaceae 6: 3745. 1962is new combination for Pyrrhocactus setosiflorus F.Ritter in Succulenta (Netherlands) 1962: 70. 1962Taxon for this namePyrrhocactus setosiflorus Backeb.