Climber. Branchlets weakly angled, sparsely lenticellate or not, glabrous or sparsely puberulent, glabrescent. Leaves in whorls of 4; petiole 0.3-6 cm long, glabrous; blade subcoriaceous, elliptic, usually narrowly so, 3.1-12 by 0.8-3.4 cm, 2.3-5.8 times as long as wide, apex long acuminate, acumen obtuse, base cuneate, margin weakly undulate, glabrous beneath and above, midrib sunken above, secondary veins 29-55 pairs, 70° from midrib, weakly prominent above, weakly visible beneath. Inflorescence axillary, with several clear internodes and unbranched side branches, delicate, sparsely puberulent all over, 2-2.8 cm long; peduncle 0.9-1.3 cm by 0.6 mm; bracts caducous or persistent, deltoid, 0.9-1.2 by 0.6-0.7 mm; bracteoles absent; flowers 6 or 7; pedicels 2.4-4.5 mm long. Sepals ovate, 1.2-1.4 by 0.6-0.7 mm, 1.9-2 times as long as wide, apex acute, ciliate, sparsely puberulent, glabrous inside. Corolla white with orange tube; bud head c. 2.8 mm long which is 0.44 of bud length, narrowly ovate, apex acuminate; tube slightly inflated, 4.2-4.6 by 1.2-1.3 mm, 3.5 times as long as sepals, 0.9-0.93 times as long as lobes, glabrous outside, pubescent in upper half and around stamens inside; lobes linear, apex acuminate, base auriculate, 4.5-4.8 by 1 mm, 4.5-4.6 times as long as wide, glabrous outside and inside, not ciliate. Stamens inserted at c. 2.3 mm from corolla base which is 0.53 of tube length; filaments c. 0.6 mm long; anther apex c. 0.8 mm from corolla mouth, anthers c. 1 by 0.4 mm. Ovaries c. 1 mm high, densely pubescent all over; style c. 1.4 mm long; style head c. 0.4 mm long, pubescent. Fruit not seen.
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