Shrubs climbing or trees, 4–10(–25) m tall. Bark gray-brown. Branchlets terete, minutely ferrugineous tomentose when young, later glabrescent. Leaves 1-foliolate; petiole 1–2 cm, slightly inflated at both ends, glabrous; leaf blade oblong or oblong-lanceolate, 7–14 × 2.5–4.5 cm, thinly leathery, glabrous on both surfaces, veins prominent abaxially, lateral veins 4–7-paired, base rounded, margin entire, apex acuminate or shortly pointed. Inflorescences axillary or terminal, paniculate or glomerulate-racemose, 1.5–5 cm; rachis and pedicels minutely yellowish tomentose. Flowers bisexual. Sepals 5, ovate-lanceolate, 2–3 mm, shortly tomentose abaxially. Petals 5, white, oblong-lanceolate, 6–7 mm, shortly tomentose on both surfaces. Stamens ca. 10, unequal, 5 opposite sepals well developed, 5 opposite petals abortive; filaments villous; anthers bright brown. Carpel 1, compressed ovoid, 1-celled, villous. Follicle ovoid, 12–20 mm, densely ferrugineous tomentose, apex beaked. Seed 1, dark brown, slightly glossy, ca. 1.5 mm, base covered by 2-lobed aril. Fl. Oct–Mar, fr. Jul of following year.

Dense mountain forests; Low elevations. Hainan.