Original Description:The Cactaceae 2
p.122 - Britton & Rose (1920)
Plants stout, the joints strongly 3-angled or 3-winged, the young growth 5 or 6-angled; wings with deep undulations; areoles large, 3 to 6 cm. apart: spines brown or blackish when young; radial spines 1 to 6, very short, conic, less than 1 cm. long; central spine usually 1, sometimes 2, often very stout and elongated, somtimes 8 cm long; flower, including the ovary, 18 to 20 cm long; tube 4cm long, including the funnelform throat 12 cm long; throat 4 cm broad at mouth; outer perianth-segments linear, brown or greenish, 6 cm long; inner perianth-segments 2 to 4 cm long; stamens white; style thick, cream-colored; fruit 3.5 cm long, light red, glossy, covered with large areoles bearing white felt; skin thick, finally splitting as the fruit ripens; pulp red.
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