Climber. Branchlets weakly angled, sparsely lenticellate or not, glabrous or sparsely and minutely puberulent. Leaves opposite to whorls of 4; petiole 0.2-0.8 cm long, glabrous or pubescent; blade coriaceous, subcoriaceous or papery, elliptic, obovate or spathulate, 1.3-7 by 0.5-2.8 cm, 1.6-8.8 times as long as wide, apex emarginate to acuminate or caudate, sometimes notched even when acuminate, base acute or cuneate, margin weakly undulate or not, glabrous or sparsely puberulent only on midrib beneath, glabrous or puberulent only on midrib above, not punctate beneath, secondary veins 17-38 pairs, 55-70° from midrib. Inflorescence axillary or terminal, a simple unbranched pleiochasium or with clear internodes and unbranched side branches, delicate, glabrous to sparsely puberulent, 1.5-5.2 cm long; peduncle 0.5-2.3 cm by 0.4-0.8 mm; bracts caducous or persistent, ovate, deltoid or linear; bracteoles present, two immediately beneath calyx or several along pedicel; flowers 3-6; pedicels 1-8 mm long. Sepals ovate, 1.3-2 by 0.7-1.1 mm, 1.4-2.1 times as long as wide, apex acute or acuminate, ciliate, glabrous to sparsely puberulent. Corolla white; bud head 2.2-3.2 mm long which is 0.26-0.34 of bud length, narrowly ovate, ovate or deltoid, apex acuminate; tube cylindrical, 5.9-7.6 by 1.4-1.8 mm, 3.6-5 times as long as sepals, 1.9-2.6 times as long as lobes, glabrous outside, pubescent in upper half and around stamens or pubescent in a band below the stamens inside, sometimes very sparsely so; lobes elliptic or ovate, 2.3-3.8 by 1-2.2 mm, 1.4-2.3 times as long as wide, apex acuminate, base auriculate, glabrous outside and inside, not ciliate. Stamens inserted at 4.5-5.7 mm from corolla base which is 0.73-0.81 of tube length; filaments 0.5-0.7 mm long; anther apex 0-0.4 mm from corolla mouth, anthers 1-1.2 by 0.4-0.5 mm. Ovaries 0.7-0.9 mm high, sparsely or densely pubescent all over; style 2.4-4.7 mm long; style head 0.3-0.6 mm long, glabrous or pubescent. Fruit green or yellow-orange, stalks 2.8-5.5 mm long, with 1 or 2 articles in each string, 1.5 mm between articles, glabrous or sparsely puberulent at ends, articles fleshy, 6.6-15 by 6.6-9.6 mm, ellipsoid, symmetrical. Seeds ovoid, 9.4-10.2 by 5-5.3 by 4.6-4.7 mm.
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