Mammillaria milleri f. swinglei (Britton & Rose) Neutel. in Succulenta (Netherlands) 65: 119. 1986 Mammillaria milleri f. swinglei (Britton & Rose) Neutel. in Succulenta (Netherlands) 65: 119. 1986is new combination for Neomammillaria swinglei Britton & Rose, Cactaceae 4: 158. 1923Taxon for this nameMammillaria milleri f. swinglei (Britton & Rose) Neutel.