Caulis volubilis, glaber; folia lanceolata, membranacea, glabra; radii 12-35, tenuissimi, ut ovarium glaberrimi; segmenta perianthii inaequalia, petalis quam sepalis ca. 5 mm. longioribus. (Eubomarea ? Caldasianae) Vine, 4-10 m. long, glabrous throughout, even the rays and the ovary without a vestige of indument; stem subangular; leaves lanceo-late, 3-15 cm. long, 1-4 cm. wide, attenuate-acuminate at apex, abruptly tapering at base to an undulate-margined petiole up to 1 cm. long, closely nerved, membranous; outer bracts oblanceolate, 2-3 cm. long, 0.5-1 cm. wide, acuminate, reflexed, reddish, the inner narrow-ly linear, erect or divaricate, about half as long; umbel to 35-rayed, the rays 3-8 cm. long, very slender, wiry, simple, ebracteolate or bearing toward the base a small ovate bract-let up to 3 mm. long; ovary short-turbinate; sepals oblong-spatulate, about 2.5 cm. long and 8 mm. wide, obtuse, scarlet (red, orange, pinkish orange); petals about 3 cm. long, orange, obscurely purple-spotted, the blade cuneiform, 1 cm. wide, gradually tapering to a claw about 1 cm. long; anthers oblong, 3 mm. long, with a circular cavity at the base; fruit 1.5-2 cm. wide, sharply angled, soon dehiscent; seeds 4 mm. long.
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