Lianas to 5 m. Branchlets glabrous, lenticellate. Petiole 1-1.5 cm, puberulent; leaf blade elliptic or oblong, 8-12.5 × 1.5-5.2 cm, base obliquely auriculate, apex short acuminate, glabrous, drying brownish; lateral veins 5-8 pairs. Cymes 8-10 × 5-15 cm, many flowered; peduncle yellow pubescent. Pedicel ca. 2 mm. Sepals puberulent, glands absent. Corolla yellowish white, ca. 5 mm, tube ca. 1/4 as long; lobes oblong. Corona lobes ovate-elliptic, apex retuse, with a short adaxial appendage. Anther appendages apiculate. Stigma head top-shaped, hirsute, twice as long as anthers. Fl. May.

* Dense woods. Hainan.