Neomammillaria flavovirens (Salm-Dyck) Britton & Rose, Cactaceae 4: 85–86. 1923 Neomammillaria flavovirens (Salm-Dyck) Britton & Rose, Cactaceae 4: 85–86. 1923is new combination for Mammillaria flavovirens Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 117. 1850Taxon for this nameNeomammillaria flavovirens (Salm-Dyck) Britton & Rose