Description from Flora of China
Shrubs, to 8 m tall, climbing. Branchlets hispid. Petiole 2-5 mm, puberulent; leaf blade elliptic-oblong to oblong, 6-12 × 2.5-4 cm, leathery, glabrous or only midvein abaxially puberulent, adaxially lucid, secondary veins 8-10 on each side of midvein and adaxially prominent, base rounded and slightly oblique. Inflorescences 1-flowered. Pedicel slightly longer than hooked peduncle, puberulent. Sepals ovate-triangular, ca. 5 mm, glabrescent. Outer petals ovate-lanceolate, 1-1.8 cm, thickened, outside densely sericeous pubescent, base concave; inner petals basally concave. Stamens cuneate; connectives apically 3-angled, puberulent. Carpels ovate-oblong, glabrous; ovules 2 per carpel, basal; stigmas shortly clavate. Monocarps black when dry, ellipsoid, 2-4 × 1.5-3 cm, apex subrounded. Fl. Mar-May, fr. May-Aug.
Dense woodlands, thickets; 300-1500 m. Guangdong, Guangxi, Guizhou, Hainan, Hunan, Yunnan [Vietnam].