Ferocactus pottsii (Salm-Dyck) Backeb., Cactaceae 5: 2738. 1961 Ferocactus pottsii (Salm-Dyck) Backeb., Cactaceae 5: 2738. 1961is new combination for Echinocactus pottsii Schur ex Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 35. 1850Taxon for this nameFerocactus pottsii (Salm-Dyck) Backeb., Cactaceae 5: 2738. 1961