Mammillaria glassii var. ascensionis (Repp.) Glass & R.A.Foster in Cact. Succ. J. (Los Angeles) 51(3): 126. 1979
Mammillaria glassii var. ascensionis in Cact. Succ. J. (Los Angeles) 51(3): 126. 1979
is new combination for Mammillaria ascensionis in Kakteen And. Sukk. 30(3): 61–62. 1979