Mammillaria rhodantha var. neglecta Pfeiff., Enum. Diagn. Cact.: 31. 1837 Mammillaria rhodantha var. neglecta Pfeiff., Enum. Diagn. Cact.: 31. 1837is earlier homonym of Mammillaria rhodantha var. neglecta Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 11. 1850Taxon for this nameMammillaria rhodantha var. neglecta Pfeiff.