Neomammillaria microcarpa (Engelm.) Britton & Rose, Cactaceae 4: 155. 1923 Neomammillaria microcarpa (Engelm.) Britton & Rose, Cactaceae 4: 155. 1923is new combination for Mammillaria microcarpa Engelm., Not. Milit. Reconn.: 157. 1848Taxon for this nameNeomammillaria microcarpa (Engelm.) Britton & Rose