Neomammillaria elongata (DC.) Britton & Rose, Cactaceae 4: 134–135, f. 146. 1923 Neomammillaria elongata (DC.) Britton & Rose, Cactaceae 4: 134–135, f. 146. 1923is new combination for Mammillaria elongata DC. in Mém. Mus. Hist. Nat. 17: 109. 1828Taxon for this nameNeomammillaria elongata (DC.) Britton & Rose