A much-branched climbing shrub with tendrils (modified inflorescences) from the branch-forks; young branches more or less rusty-villous, at length usually glabrescent, reddish-brown dotted with whitish lenticels. Leaves small, oblong to lanceolate, subacuminate to subobtuse (rarely subacute) at the base, 3/4–1 3/4 in. long, 6–7 lin. broad, coriaceous, rusty-villous in bud, soon glabrescent except the midrib and margins, glossy above; midrib very slender and flat above, much stouter and prominent below; secondary nerves subhorizontal, about 10–12 on each side, very faint on both sides, and like the extremely delicate network of the veins not or scarcely raised on either side; petiole more or less villous, 1 lin. long. Corymbs small, dense, subsessile or shortly peduncled; peduncles and lower bracts rusty-villous; upper bracts scarious and almost glabrous; pedicels very short, puberulous. Calyx about 1 1/2 lin. long; sepals broad-ovate-oblong, obtuse or subtruncate, keeled, brown, subscarious, glossy, fulvo-ciliate along the margins and the keel, otherwise almost glabrous. Corolla pale yellow or white; tube cylindric below the middle, then inflated and rather suddenly constricted close to the mouth, 2–2 1/2 lin. long, very minutely and densely rusty-tomentose in the upper 2/3; pubescent within except at the base; lobes linear-oblong, subacute, as long as the tube, minutely fulvo-velvety without, mouth very narrow, very minutely pubescent. Stamens in the upper 1/4 of the tube; anthers linear-ovate, acute, reaching almost to the mouth. Ovary ovoid, glabrous at the base, top densely rusty-villous; style and stigma 1 lin. long, the latter cylindric from a thickened base, bifid. Fruit like a small orange, 1–2 in. in diam., greenish-purple outside, rind smooth, thick, with a layer of sclerenchymatous nodules; seeds up to 7 lin. long.
