Mammillaria elongata var. subechinata (Salm-Dyck) Schelle, Handb. Kakteenkult.: 247. 1907 Mammillaria elongata var. subechinata (Salm-Dyck) Schelle, Handb. Kakteenkult.: 247. 1907is new combination for Mammillaria subechinata Salm-Dyck, Cact. Hort. Dyck., ed. 1849: 101. 1850Taxon for this nameMammillaria elongata var. subechinata (Salm-Dyck) Schelle