Original Description:The Cactaceae 2
p.120 - Britton & Rose (1920)
Stems branching, slender, 2 to 3 cm in diameter; ribs 7 to 10, rather low; areoles 10 mm apart; radial spines 8 to 12, 4 to 15 mm long, slender, brownish; centrals 3 to 5; flowers 8 to 10 cm long, "whitish inside, dirty purplish or reddish outside;" perianth-segments linear to oblong, rounded at apex; stamens not extending nearly as far as the perianth-segments; ovary densely covered with brownish bristly spines.
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