Mammillaria haynei (Otto ex Salm-Dyck) Ehrenb. in Bot. Zeitung (Berlin) 2: 833. 1844 Mammillaria haynei (Otto ex Salm-Dyck) Ehrenb. in Bot. Zeitung (Berlin) 2: 833. 1844is new combination for Echinocactus haynei Otto ex Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 32. 1850Taxon for this nameMammillaria haynei (Otto ex Salm-Dyck) Ehrenb.