Grusonia

Grusonia includes species of opuntioids that are or have been included in the genera Micropuntia, Marenopuntia and Corynopuntia. They have cylindrical or club shaped segments. Grusonia differs from Cylindropuntia by the lack of papery sheaths on the spines. All these species are native from southwestern USA and northwestern Mexico, including Baja California.

Species and varieties
Grusonia emoryi (Devil Cholla, Stanly's Club Cholla)
Grusonia invicta
Grusonia stanlyi (Devil Cholla, Stanly's Club Cholla) synonym of Grusonia emoryi

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