Mammillaria glassii subsp. ascensionis (Repp.) D.R.Hunt, Mammillaria Postscripts 6: 6. 1997
Mammillaria glassii subsp. ascensionis, Mammillaria Postscripts 6: 6. 1997
is new combination for Mammillaria ascensionis in Kakteen And. Sukk. 30(3): 61–62. 1979