Stenocactus pentacanthus subsp. tulensis Halda, Kupčák & Sladk. in Acta Mus. Richnov., Sect. Nat., 7: 37. 2000 Stenocactus pentacanthus subsp. tulensis Halda, Kupčák & Sladk. in Acta Mus. Richnov., Sect. Nat., 7: 37. 2000Taxon for this nameStenocactus pentacanthus subsp. tulensis Halda, Kupčák & Sladk.