Erect shrub or climber. Branchlets weakly or strongly angled, sparsely lenticellate or not, glabrous to densely and minutely puberulent, sometimes glabrescent. Leaves in whorls of 3 or 4; petiole 0.1-0.6 cm long, glabrous or pubescent; blade coriaceous or subcoriaceous, elliptic or obovate, 1-7.3 by 0.4-2.1 cm, 1.8-4 times as long as wide, apex rounded to acuminate and not folded back, not mucronate, base cuneate, margin weakly undulate or not, glabrous and punctate beneath, glabrous or puberulent only on midrib above, secondary veins 14-23 pairs, 70° from midrib. Inflorescence axillary, flowers solitary or a simple unbranched pleiochasium, sparsely to densely puberulent, 1-2 cm long; peduncle 0.7-0.8 cm by 1.1-1.2 mm; bracts persistent, ovate, deltoid or narrowly ovate, 1.6-2.9 by 0.8-1.8 mm; bracteoles present, two on pedicel; flowers 1-3; pedicels 1.7-4 mm long. Sepals free, not fleshy, ovate, 1.2-1.3 by 1-1.4 mm, 0.9-1.2 times as long as wide, apex rounded or obtuse, ciliate, glabrous or sparsely puberulent. Corolla yellow or with pale brown tube and white lobes; bud head 1.8-2.5 mm long which is 0.26-0.37 of bud length, ellipsoid or ovate, apex obtuse or acute; tube cylindrical, 4.2-5.2 by 1.4-1.7 mm, 3.5-4 times as long as sepals, 1.9-2.9 times as long as lobes, glabrous outside, sparsely pubescent around stamens and more densely in a band beneath them inside; lobes ovate or orbicular, 1.8-2.2 by 1.4-1.8 mm, 1-1.6 times as long as wide, apex obtuse, base auriculate, glabrous outside, glabrous or pubescent at base of lobes inside, not ciliate. Stamens inserted at 3.1-3.7 mm from corolla base which is 0.6-0.66 of tube length; filaments 0.9-1 mm long; anther apex 0.3-0.5 mm from corolla mouth, anthers 1.2-1.3 by 0.4 mm. Ovaries 0.8-1.1 mm high, densely pubescent all over; style 0.6-1.9 mm long; style head 0.4-0.6 mm long. Fruit green or yellowish green (probably immature), stalks 2.4-3.6 mm long, with 1 or 2 articles in each string, 0.5-1 mm between articles, glabrous or sparsely puberulent at ends, with thin flesh, 9.6-16.2 by 8-11.2 mm, ellipsoid or cylindrical, symmetrical, apex rounded or apiculate. Seeds elliptic, 8.2-13.4 by 7.5-8.7 by 6.6-8 mm.
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