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.
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.
Young shoots, petioles and inflorescences minutely puberulous, bark of older twigs yellowish– or greyish–brown, splitting longitudinally.
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.
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.
Petioles 5–6 mm. long, articulated near the base or just below the middle.
Small shrub, tree up to c. 6 m. or a liane climbing to 15 m. or more.
Fruit usually bilobed, lobes 7–12 mm. long (when dry), ellipsoid.
Acarodomatia absent.