Coryphantha cornifera var. echinus (Engelm.) L.D.Benson in Cact. Succ. J. (Los Angeles) 41: 189. 1969
Coryphantha cornifera var. echinus in Cact. Succ. J. (Los Angeles) 41: 189. 1969
is new combination for Mammillaria echinus in Proc. Amer. Acad. Arts 3: 267. 1856