Mammillaria backebergiana subsp. ernestii (Fittkau) D.R.Hunt, Mammillaria Postscripts 6: 8. 1997
Mammillaria backebergiana subsp. ernestii, Mammillaria Postscripts 6: 8. 1997
is new combination for Mammillaria ernestii in Cact. Suc. Mex. 16(2): 36. 1971
Mammillaria backebergiana subsp. ernestii, Mammillaria Postscripts 6: 8. 1997