Neomammillaria subpolyedra (Salm-Dyck) Britton & Rose, Cactaceae 4: 105. 1923 Neomammillaria subpolyedra (Salm-Dyck) Britton & Rose, Cactaceae 4: 105. 1923is new combination for Mammillaria subpolyedra Salm-Dyck, Hort. Dyck.: 343. 1834Taxon for this nameNeomammillaria subpolyedra (Salm-Dyck) Britton & Rose