Melocactus pruinosus Werderm. in Notizbl. Bot. Gart. Berlin-Dahlem 12: 228. 1934 Melocactus pruinosus Werderm. in Notizbl. Bot. Gart. Berlin-Dahlem 12: 228. 1934Taxon for this name? Melocactus pruinosus Werderm.
