Mammillaria grusonii subsp. pachycylindrica (Backeb.) Lodé in Cact.-Avent. Int. 98(Suppl.): 5. 2013
Mammillaria grusonii subsp. pachycylindrica in Cact.-Avent. Int. 98(Suppl.): 5. 2013
is new combination for Mammillaria pachycylindrica in Cact. Succ. J. Gr. Brit. 21: 82, fig. 1959