Gray-green to bluish gray cactus with markedly tuberculate stems, whitish flowers, red fruit (at maturity). Shrubby habit to a few feet tall, stems to 2-2.5 inches wide. 1 central spine, 2-5 grayish radial spines. Nocturnal flowers near stem tips persist into daytime.

Strong colors and unusually tuberculate stems make this an attractive plant in cultivation. New spines are intense red, glaucous stems are bright in strong light.

From the Mexican states of Guerrero, Morelos, Puebla and México.

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