Corryocactus aureus

Corryocactus aureus is a cactus species that forms large colonies through underground shoots. Its stems are erect, unsegmented, and range in shape from cylindrical to club-shaped, reaching up to 30 centimeters in length and 3 to 5 centimeters in diameter. The stems have 5 to 8 ribs, up to 1 centimeter high, which are slightly notched on their backs. The epidermis is typically green, though it can sometimes appear purple or brown. The areoles on the ribs bear awl-shaped spines that are brown to blackish. These include one or two central spines, which can grow up to 6 centimeters long, and nine to eleven radial spines of unequal length. The flowers are orange-yellow to orange-red and measure up to 4 centimeters long. The fruits are greenish to reddish and reach a diameter of up to 2 centimeters.^[2]

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  Fruits
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  Buds and spines

This species is native to Peru, specifically the Arequipa department. It is widespread in this region and primarily inhabits desert or dry scrub biomes on hillsides at elevations between 2500 and 3500 meters above sea level.

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  Habitat in Mollebaya, Peru
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  Plant blooming in Mollebaya, Peru
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  Blooming plant in Alto Selva Alegre, Peru

Corryocactus aureus was first described as Cactus aureus in 1834 by Franz Julius Ferdinand Meyen.^[3] The specific epithet "aureus" means "golden" or "golden yellow," referring to the color of the species' flowers. In 1963, Paul Clifford Hutchison transferred the species to the genus Corryocactus.^[4]