Appearance
It has a shrubby habit, with erect columnar stems around 2–3 m tall and 5–9 cm in diameter. The stem is bluish green with 6–9 prominent ribs. The gray colored areoles have yellow-brown spines; there are 1–3 longer central spines, up to 5 cm long, and 6–9 shorter radial spines, up to 2 cm long. Large white flowers, up to 18 cm long, are borne at the top of the stems.References:
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