Mammillaria pyrrhocephala var. donkelaerii Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 17. 1850 Mammillaria pyrrhocephala var. donkelaerii Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 17. 1850Taxon for this nameMammillaria pyrrhocephala var. donkelaerii Salm-Dyck