Coryphantha sulcata var. nickelsiae (K.Brandegee) L.D.Benson in Cact. Succ. J. (Los Angeles) 41: 188. 1969
Coryphantha sulcata var. nickelsiae in Cact. Succ. J. (Los Angeles) 41: 188. 1969
is new combination for Mammillaria nickelsiae in Zoë 5(2): 31. 1900