Original Description:Cactus- Organe de l Association Francaise de Cactus et Plantes Grasses Paris 63
p.133 - Friedrich Ritter (1959) View Latin Description
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Original Description:The Cactaceae 3
p.89 - Britton & Rose (1920)
Plants with large fleshy roots, sometimes 25 cm long and 7 to 8 cm in diameter, usually single, rarely in 2's and 3's, globular to elongate-cylindric, 8 to 26 cm long, 4 to 9 cm in diameter, dull green to almost white; ribs usually 13, very low; crown of plant covered with long white wool at flowering time; spines about 12, 1.5cm long, rather stout, at first yellow but soon gray; flowers yellow, 2.5cm long; fruit green, 6 to 8 mm long, naked, crowned by 5 green scales; seeds black, 2 mm long