Original Description:The Cactaceae 2
p.149 - Britton & Rose (1920)
Plants 5 meters tall or less, the stems erect, reclining or clambering prominently, 10 to 12-ridged, the ridges more or less depressed between the areoles, the grooves rather deep and sharp; areoles about 2 cm apart; spines acicular, 9 to 13 in each areole, mostly grayish and yellowish at the tip, one of each areole longer than the others, mostly 2 to 4 cm long; young buds copiously white-hairy; flowers 12 to 20 cm long, odorous; ovary bearing subulate or lanceolate-subulate scales subtending long white hairs; scales of the flower-tube few and remote, subulate, slenderly acuminate, not turgid, with a tuft of long white hairs in each axil; outer perianth-segments very narrowly linear, slenderly acuminate; inner perianth-segments white or pinkish, spatulate, caudate-tipped; fruit obovoid to globose, about 6 cm in diameter, dull red, with tufts of long hairs persistent with the scale-bases
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