Grusonia zehntneri (Britton & Rose) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006 Grusonia zehntneri (Britton & Rose) G.D.Rowley in Tephrocactus Study Group 12(3): 43. 2006is new combination for Pereskia zehntneri Britton & Rose, Cactaceae 1: 14. 1919Taxon for this nameGrusonia zehntneri (Britton & Rose) G.D.Rowley