Mammillaria viridis var. praelii (Muehlenpf.) Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 16. 1850
Mammillaria viridis var. praelii, Cact. Hort. Dyck., ed. 1849: 16. 1850
is new combination for Mammillaria praelii in Allg. Gartenzeitung 14(47): 372. 1846