Mammillaria seegeri var. pruinosa (Ehrenb.) Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 8. 1850 Mammillaria seegeri var. pruinosa (Ehrenb.) Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 8. 1850is new combination for Mammillaria pruinosa Ehrenb. in Allg. Gartenzeitung 17: 261. 1849Taxon for this nameMammillaria seegeri var. pruinosa (Ehrenb.) Salm-Dyck