Neomammillaria mercadensis (Patoni) Britton & Rose, Cactaceae 4: 145, f. 160. 1923 Neomammillaria mercadensis (Patoni) Britton & Rose, Cactaceae 4: 145, f. 160. 1923is new combination for Mammillaria mercadensis Patoni in Alianza Cient. Univ. 1: 54. 1910Taxon for this nameNeomammillaria mercadensis (Patoni) Britton & Rose