Grusonia porteri (Brandegee ex F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 42. 2006 Grusonia porteri (Brandegee ex F.A.C.Weber) G.D.Rowley in Tephrocactus Study Group 12(3): 42. 2006is new combination for Opuntia porteri K.Brandegee ex F.A.C.Weber in Bois, Dict. Hort.: 899. 1898Taxon for this nameGrusonia porteri (Brandegee ex F.A.C.Weber) G.D.Rowley