Notocactus nigrispinus (K.Schum.) Buining in Succulenta (Netherlands) 49: 179. 1970 Notocactus nigrispinus (K.Schum.) Buining in Succulenta (Netherlands) 49: 179. 1970is new combination for Echinocactus nigrispinus K.Schum. in Monatsschr. Kakteenk. 9: 45. 1899Taxon for this nameNotocactus nigrispinus (K.Schum.) Buining