Grusonia molesta (Brandegee) G.D.Rowley in Tephrocactus Study Group 12(3): 44. 2006 Grusonia molesta (Brandegee) G.D.Rowley in Tephrocactus Study Group 12(3): 44. 2006is new combination for Opuntia molesta K.Brandegee in Proc. Calif. Acad. Sci. ser. 2, 2(2): 164. 1889Taxon for this nameGrusonia molesta (Brandegee) G.D.Rowley