A climbing shrub, perfectly glabrous in all its parts; young branches slender, dark reddish-brown, dotted and often rough with numerous lenticels. Leaves oblong or subovate-oblong, obscurely (rarely distinctly) and obtusely acuminate or obtuse, rounded at the base, 2–4 in. long, 4/5–1 1/2 in. broad, chartaceous, glossy above; midrib slender, channelled above, slightly raised below; secondary nerves extremely slender, 11–16 on each side, rather spreading, straight, connected rather close to the margins by flat equally fine arches; network of veins delicate, very inconspicuous, faintly impressed above; petiole 2 1/2 lin. long. Corymbs small, few-flowered, dense, glabrous, very shortly peduncled or subsessile, much shorter than the leaves; bracts small, ovate, obtuse; pedicels up to 1 lin. long. Calyx slightly over 1 lin. long, quite glabrous, dark brown, with pale thin margins when dry; sepals ovate, broad, obtuse. Corolla dark-reddish when dry, quite glabrous; tube subcylindric, somewhat stout, slightly widened from the middle upwards, 2 1/2–3 1/2 lin. long; lobes oblong, obtuse, 4 1/2–5 1/2 lin. long, rather straight. Stamens inserted at the middle of the corolla-tube. Ovary depressed ovoid, sulcate, glabrous; style and stigma about 1 lin. long; stigma shortly cylindric from a thickened base, bifid. Fruit globose, 1 1/2–1 3/4 in. in diam.; rind thin, leathery, without a sclerenchymatous layer; seeds oblong, in a fibrous juicy pulp, up to 7 lin. long; albumen horny, coarsely pitted; cotyledons very thin, foliaceous.
