Description: Woody climber, young shoots glabrous. Leaves opposite, elliptic, oblong or ovate to broadly lanceolate, 5–14 cm long; apex acute to acuminate; base acute to obtuse or rounded; 1–2 secondary nerves arising from near the base of each side and forming loops, 2–3 obscure lateral nerves on each. Inflorescence terminal on side shoots, 1–3 flowers; bracts linear, ca 0.2 cm long; pedicels 2–4 cm long. Calyx 5, tube ca 0.2 cm long; lobes subulate, 0.6–1 cm long. Corolla white, not fragrant; tube 2.5–3.5 cm long; lobes 7–9, oblong-elliptic, ca as long as the tube. Stamens 2, inserted in the tube; filaments short, anther with short appendage. Ovary barrel shape, style simple, stigma 2, elongate. Fruit a pair, sometimes only one developed, berry, ellipsoid, to 1.2 cm long, turning black when ripe.

Thai name: ปันหยี (Pan yi)

Photos: Preecha Karaket (Kitchakut, Chathaburi)