Mammillaria heyderi var. meiacantha (Engelm.) L.D.Benson in Cact. Succ. J. (Los Angeles) 47: 40. 1975
Mammillaria heyderi var. meiacantha in Cact. Succ. J. (Los Angeles) 47: 40. 1975
is new combination for Mammillaria meiacantha in Proc. Amer. Acad. Arts 3: 263. 1856