Pereskiopsis blakeana J.G. Ortega Pereskiopsis blakeana J.G. Ortega in Bol. Pro-Cult. Reg. 1: sine pag. 1929 sec. Hunt 2016=Grusonia blakeana (J.G. Ortega) G.D. Rowley in Tephrocactus Study Group 12: 42. 2006 syn. sec. Rowley 2006