Grusonia alcahes (F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006 Grusonia alcahes (F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006is new combination for Opuntia alcahes F.A.C.Weber in Bull. Mus. Hist. Nat. (Paris) 1: 321. 1895Taxon for this nameGrusonia alcahes (F.A.C.Weber) G.D.Rowley