Pyrrhocactus grandiflorus F.Ritter in Succulenta (Netherlands) 1960: 41. 1960
Pyrrhocactus grandiflorus in Succulenta (Netherlands) 1960: 41. 1960
is basionym for Neoporteria curvispina var. grandiflora in Cact. Succ. J. Gr. Brit. 28: 56. 1966
is basionym for Horridocactus grandiflorus, Cactaceae 6: 3796. 1962