Ferocactus bicolor var. schwarzii (Backeb.) N.P.Taylor in Cact. Succ. J. Gr. Brit. 41: 30. 1979
Ferocactus bicolor var. schwarzii in Cact. Succ. J. Gr. Brit. 41: 30. 1979
is new combination for Thelocactus schwarzii in Cact. Succ. J. Gr. Brit. 12: 81. 1950