Gymnocactus knuthianus (Boed.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 151. 1951

Gymnocactus knuthianus (Boed.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 151. 1951

Gymnocactus knuthianus (Boed.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 151. 1951

is new combination for Echinocactus knuthianus Boed. in Monatsschr. Deutsch. Kakteen-Ges. 2: 139. 1930

Taxon for this name

Gymnocactus knuthianus (Boed.) Backeb.