Notocactus bueneckeri f. intermedia (F.Ritter) S.Theun. in Succulenta (Netherlands) 60: 142. 1981 Notocactus bueneckeri f. intermedia (F.Ritter) S.Theun. in Succulenta (Netherlands) 60: 142. 1981Taxon for this nameNotocactus bueneckeri f. intermedia (F.Ritter) S.Theun.