Original Description:The Cactaceae 2
p.97 - Britton & Rose (1920)
Tree-like, 6 to 7 meters high, with a definite smooth trunk 1 meter long or more, with few branches, at first spreading, then nearly erect; ribs few, usually 8, prominent areoles 1 to 1.5 cm apart, large, filled with short brown wool; spines few, 6 or less, pale in color, rather stout, one of them longer, sometimes 3 cm long; flowers 6 to 7 cm long, opening during the day; outer perianth-segments purplish; scales on the ovary ovate, 4 to 6 mm long, imbricated, acuminate, with erose margins.
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