Ferocactus schwarzii G.E.Linds. in Cact. Succ. J. (Los Angeles) 27: 70. 1955
Ferocactus schwarzii in Cact. Succ. J. (Los Angeles) 27: 70. 1955
is basionym for Parrycactus schwarzii in Novosti Sist. Vyssh. Rast. 32: 118. 2000
Ferocactus schwarzii in Cact. Succ. J. (Los Angeles) 27: 70. 1955