Mammillaria subpolyedra Salm-Dyck, Hort. Dyck.: 343. 1834 Mammillaria subpolyedra Salm-Dyck, Hort. Dyck.: 343. 1834is basionym for Neomammillaria subpolyedra (Salm-Dyck) Britton & Rose, Cactaceae 4: 105. 1923is basionym for Cactus subpolyedrus (Salm-Dyck) Kuntze, Revis. Gen. Pl. 1: 261. 1891Taxon for this nameMammillaria subpolyedra Salm-Dyck