Mammillaria fortispina Shurly in Cact. J. (Croydon) 4: 11. 1935 Mammillaria fortispina Shurly in Cact. J. (Croydon) 4: 11. 1935Taxon for this nameMammillaria fortispina Shurly in Cact. J. (Croydon) 4: 11. 1935
