Mammillaria heyderi var. gummifera (Engelm.) L.D.Benson in Cact. Succ. J. (Los Angeles) 47: 40. 1975
Mammillaria heyderi var. gummifera in Cact. Succ. J. (Los Angeles) 47: 40. 1975
is new combination for Mammillaria gummifera, Mem. Tour N. Mexico: 105. 1848