Neoporteria tuberisulcata var. nigricans (Linke) Donald & G.D.Rowley in Cact. Succ. J. Gr. Brit. 28: 58. 1966
Neoporteria tuberisulcata var. nigricans in Cact. Succ. J. Gr. Brit. 28: 58. 1966
is new combination for Echinopsis nigricans in Allg. Gartenzeitung 25: 239. 1857