Mammillaria geminispina var. nobilis (Pfeiff.) Backeb., Cactaceae 5: 3185. 1961 Mammillaria geminispina var. nobilis (Pfeiff.) Backeb., Cactaceae 5: 3185. 1961is new combination for Mammillaria nobilis Pfeiff. in Allg. Gartenzeitung 8: 282. 1840Taxon for this nameMammillaria geminispina var. nobilis (Pfeiff.) Backeb.