Notocactus sellowii var. macracanthus (Arechav.) S.Theun. in Succulenta (Netherlands) 60: 141. 1981 Notocactus sellowii var. macracanthus (Arechav.) S.Theun. in Succulenta (Netherlands) 60: 141. 1981is new combination for Echinocactus sellowii var. macrocanthus Arechav.Taxon for this nameNotocactus sellowii var. macracanthus (Arechav.) S.Theun.