Gymnocactus knuthianus (Boed.) Backeb.

, Cact. Succ. J. (Los Angeles) 23: 151 (1951).
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External links to taxonomic opinions:
POWO
IPNI Life Sciences Identifier (LSID)
urn:lsid:ipni.org:names:115335-2
Publication
Cactus and Succulent Journal. [Cactus and Succulent Society of America]
Collation
23: 151
Family as entered in IPNI
Cactaceae

Links

Nomenclatural link
Echinocactus knuthianus Boed., Monatsschr. Deutsch. Kakteen-Ges. 2: 139, fig (1930).
Same citation as
Gymnocactus knuthianus (Boed.) Backeb., Cact. Succ. J. (Los Angeles) 23: 151 (1951).