Notocactus purpureus F.Ritter in Succulenta (Netherlands) 49: 109. 1970
Notocactus purpureus in Succulenta (Netherlands) 49: 109. 1970
is basionym for Notocactus horstii f. purpureus in Internoto 14: 64. 1993
Notocactus purpureus in Succulenta (Netherlands) 49: 109. 1970
Taxon for this name