Corryocactus

Corryocactus is a genus of cacti. The genus was formerly placed in the tribe Notocacteae. It has also been placed in the tribe Echinocereeae. A 2011 molecular phylogenetic study excluded the genus from the "core" Echinocereeae, commenting that it lay "outside of a well-supported larger clade in our analysis".

Synonymy
The following genera have been brought into synonymy with this genus:
 * Corryocereus Fric & Kreuz. (orth. var.)
 * Erdisia Britton & Rose
 * Eulychnocactus Backeb. (nom. inval.)