Grusonia wolfii (L.D.Benson) G.D.Rowley in Tephrocactus Study Group 12(3): 45. 2006 Grusonia wolfii (L.D.Benson) G.D.Rowley in Tephrocactus Study Group 12(3): 45. 2006is new combination for Opuntia echinocarpa var. wolfii L.D.Benson in Cact. Succ. J. (Los Angeles) 41: 33. 1969Taxon for this nameGrusonia wolfii (L.D.Benson) G.D.Rowley