Cephalophyllum griseum (S.A.Hammer & U.Schmiedel) H.E.K.Hartmann in Cact. Succ. J. (Los Angeles) 75: 170. 2003
Cephalophyllum griseum in Cact. Succ. J. (Los Angeles) 75: 170. 2003
is new combination for Hallianthus griseus in Cact. Succ. J. (Los Angeles) 74: 230. 2002
Cephalophyllum griseum in Cact. Succ. J. (Los Angeles) 75: 170. 2003