A powerful climber; young branches very minutely rusty tomentose, soon glabrescent. Leaves obovate-oblong, acuminate, rounded or almost cordate at the base, 1–4 1/2 in. long, 3/4 to 2 in. broad, thinly coriaceous, shining when fresh, dull and olive-green or brown when dry, very minutely pubescent on the nerves below when young, soon glabrous except for some tufts of rusty hairs in the nerve-axils; secondary nerves 6–9 on each side; transverse nerves fine, distinct. Cymes 2-1-flowered, in slender panicles, 2–2 1/2 in. long, very minutely rusty tomentose; bracts linear-lanceolate, 2–3 lin. long; pedicels up to 1 1/2 lin. long. Calyx 1 1/4–1 3/4 lin. long, very minutely pubescent; sepals ovate-lanceolate, acuminate, intracalycular glands 5, minute. Corolla white, fragrant; tube campanulate, 2–2 1/2 lin. long, glabrous without and in the throat; Suprastaminal calli knob-shaped; lobes linear, 6–7 1/2 lin. long. Staminal cone 3/4 lin. long; anthers glabrous on the back. Carpels pubescent on the top; style obconic-cylindric, minutely papillose; stigma campanulate with a short bifid apiculus. Follicles linear, acuminate.
