Gymnocalycium spegazzinii subsp. sarkae Halda & Milt in Acta Mus. Richnov., Sect. Nat., 13: 22. 2006 Gymnocalycium spegazzinii subsp. sarkae Halda & Milt in Acta Mus. Richnov., Sect. Nat., 13: 22. 2006Taxon for this nameGymnocalycium spegazzinii subsp. sarkae Halda & Milt