Thelocactus hexaedrophorus subsp. francii Halda & Sladk. in Acta Mus. Richnov., Sect. Nat., 7: 38. 2000 Thelocactus hexaedrophorus subsp. francii Halda & Sladk. in Acta Mus. Richnov., Sect. Nat., 7: 38. 2000Taxon for this nameThelocactus hexaedrophorus subsp. francii Halda & Sladk.