Mammillaria fuscata var. russea (A.Dietr.) Backeb., Cactaceae 5: 3388. 1961 Mammillaria fuscata var. russea (A.Dietr.) Backeb., Cactaceae 5: 3388. 1961is new combination for Mammillaria russea A.Dietr. in Allg. Gartenzeitung 19: 347. 1851Taxon for this nameMammillaria fuscata var. russea (A.Dietr.) Backeb.