Original Description:The Cactaceae 2
p.180 - Britton & Rose (1920)
Branches strongly 6-angled, deep green or slightly glaucous; ribs obtuse; areoles 2 cm apart, large circular, with grayish wool at time of flowering; radial spines 5, bulbose at base; central spine 1, a little longer than the radials; flower-buds dark purple; outer perianth-segments greenish with red tips; inner perianth-segments creamy white, about 10 , spreading almost at right angles to the tube; stamens numerous, pale somewhat spreading; style white, a little longer than the stamens; flowers fully open at half past nine o'clock in the morning, deliciously fragrant; fruit small, globular, 6 mm in diameter, wine-colred, naked except a few small scales.
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