Pyrrhocactus lissocarpus var. gracilis F.Ritter in Succulenta (Netherlands) 1960: 17. 1960
Pyrrhocactus lissocarpus var. gracilis in Succulenta (Netherlands) 1960: 17. 1960
is basionym for Neoporteria curvispina f. gracilis in Cact. Succ. J. Gr. Brit. 28: 56. 1966
is basionym for Eriosyce marksiana var. gracilis, Eriosyce (Cactac.) Gen. Revis. Ampl.: 118. 1994
is basionym for Horridocactus lissocarpus var. gracilis, Cactaceae 6: 3797. 1962