Grusonia verticillata (Vaupel) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006 Grusonia verticillata (Vaupel) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006is new combination for Pereskia verticillata Vaupel in Z. Sukkulentenk. 1: 55. 1923Taxon for this nameGrusonia verticillata (Vaupel) G.D.Rowley