Original Description:The Cactaceae 3
p.127 - Britton & Rose (1920)
Short-cylindric, 4 dm high or more; ribs about 16, often spiraled, somewhat undulate; areoles large, distant; radial spines widely spreading, 14 to 16, 3 to 4 cm long, most of them thread-like, but often 2 or more above and below, subulate; central spines subulate, grayish, usually one curved or hooked at apex, teh others straight, all annulate; flowers large, 5 to 6 cm long; outer perianth-segments ovate, reddish, with narrow yellow margins; inner perianth-segments oblong-lanceolate with a narrow pink stripe down the center with greenish-yellow margins; filaments and style dark pink; stigma-lobes pale greenish brown.
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