Corryocactus

(Vaupel) Hutchison

A low-growing cactus of southern Peru, spreading through underground stems. Its short, upright stems grow beside one another, and orange-yellow flowers open above strong spines. Studies of seeds from Arequipa show a clear dependence of germination on light.

Rauh & Backeb.

Cárdenas

(Vaupel) Britton & Rose

A branching cactus of southern Peru and northern Chile with strongly projecting ribs, long spines and large yellow flowers. The succulent fruits are known as sancayo or sanky. The species has well-documented light-dependent germination, and the structure of its connection with the parasitic Ligaria cuneifolia has been studied anatomically in detail.

Ochoa & Backeb. ex D.R.Hunt

A.Pauca & Quip.

(Backeb.) F.Ritter

(K.Schum.) Britton & Rose

Cárdenas

(Rauh & Backeb.) F.Ritter ex D.R.Hunt, N.P.Taylor & G.J.Charles

F.Ritter

(Vaupel) Hutchison

Cárdenas

A cactus described in 2025 from Valle de los Volcanes in Peru's Arequipa region. Branched columns bear almost white flowers, and fruits are surrounded by soft, flexible spines. Comparison of flowers and seeds separated it from Corryocactus brevistylus.