Pediocactus ysabelae (Schlange) Halda in Acta Mus. Richnov., Sect. Nat., 5(1): 18. 1998 Pediocactus ysabelae (Schlange) Halda in Acta Mus. Richnov., Sect. Nat., 5(1): 18. 1998is new combination for Thelocactus ysabelae Schlange in Cact. Succ. J. (Los Angeles) 5: 551. 1934Taxon for this namePediocactus ysabelae (Schlange) Halda