Small shrub, tree up to c. 6 m. or a liane climbing to 15 m. or more. Young shoots, petioles and inflorescences minutely puberulous, bark of older twigs yellowish– or greyish–brown, splitting longitudinally. Petioles 5–6 mm. long, articulated near the base or just below the middle. Leaves glossy green, glabrous, often darkening on drying; lamina 1·8–6 x 1–1·4 cm., not more than twice as long as broad, broadly ovate to rounded–triangular, the apex rounded, acute or acuminate with minute thickened point, the base broadly obtuse or cordate. Venation inconspicuous on upper leaf surface, visible below; lateral nerves several, the basal ones diverging at a wide angle from the midrib and not running up to the apex. Acarodomatia absent. Flowers terminal on short branches, in (1) 3–11–flowered cymes, sweetly scented; pedicels 3–9 mm. long. Calyx tube 2–3 mm. long, glabrous; lobes 5–8, 2–7 mm. long, subulate, glabrous or puberulous. Corolla white inside, reddish or purplish outside; tube 13–20 mm, long; lobes 7–10, 10–15 mm. long, oblong, the apex cuspidate or shortly acuminate. Stamens inserted towards top of corolla tube; filaments short; anthers 2–4 mm. long. Style either well exserted from tube or 1/4–1/3 as long, with bifid stigma. Fruit usually bilobed, lobes 7–12 mm. long (when dry), ellipsoid.