Plants covered with glandular hairs and these mixed with stellate hairs on young stems, petioles, abaxial surface of leaf blade, inflorescence axis, bracts, pedicels, and calyx. Rhizome to 30 × 1 cm, ± woody. Fibrous roots ca. 3 mm in diam. Stem short but robust, with leaves borne at one side. Leaves petiolate; petiole 3-10 cm; leaf blade ovate, asymmetric, 10-20 × 5-12 cm, main veins arcuate, margin entire or obscurely verrucose denticulate. Inflorescences solitary or 2 together, pedunculate, strongly curved, bracteate; peduncle 2-4 cm; bracts ovate, with 2 flowers at axil; pedicels 1-2 mm. Calyx tube campanulate; calyx lobes broadly elliptic or linear-oblong, ca. 6 × 2-3 mm. Corolla white, 6-7 mm, cleft for more than halfway; lobes long elliptic. Stamens: connective higher than anther cells; anther cells long ellipsoid, almost laterally longitudinally dehiscent. Stigma conic, almost smooth. Berry obovoid, ca. 9 mm. Seeds ovoid, ca. 0.3 mm; testa yellow, obviously reticulate. Fl. and fr. May-Nov.

Forests, by streams, moist shady banks of ravines; [200-1500 m]. S Yunnan (Hekou, Pingbian, Xishuangbanna) [N Vietnam].