Notocactus megapotamicus f. multiflorus (Frič ex Buining) S.Stuchlík in Repert. Pl. Succ. 44: 13. 1993
Notocactus megapotamicus f. multiflorus in Repert. Pl. Succ. 44: 13. 1993
is new combination for Notocactus ottonis var. multiflorus in Succulenta (Netherlands) 1957: 105. 1957