Neomammillaria amoena (Hoppfer ex Salm-Dyck) Britton & Rose, Cactaceae 4: 120–121. 1923 Neomammillaria amoena (Hoppfer ex Salm-Dyck) Britton & Rose, Cactaceae 4: 120–121. 1923is new combination for Mammillaria amoena Hoppfer ex Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 99. 1850Taxon for this nameNeomammillaria amoena (Hoppfer ex Salm-Dyck) Britton & Rose