Trees 6--15(--20) m tall. Bark grayish brown. Branchlets gray, pale yellowish brown tomentose, or glabrous. Petiole 0.8--1.8 cm; leaf blade lanceolate, oblanceolate, or oblong-lanceolate, (5--)7--15 X 2.5--6 cm, base broadly cuneate, apex acuminate, lateral veins 15--17 pairs. Flowers solitary or in several-flowered clusters. Pedicels 6--10 mm, gray sericeous. Sepals 5, lanceolate, ovate-lanceolate, or ovate, 4--6 X 1.5--3 mm, outside gray sericeous, inside rust colored sericeous. Corolla white, tube short; lobes 5, lanceolate, ovate-lanceolate, or oblong, 5-6.5 X 2-2.5 mm. Stamens 5, 3--5 mm, with a cluster of villous hairs on each side at base; staminodes 5, lanceolate, ca. 4 mm, apex acuminate and awned, margin densely pubescent. Ovary ovoid-globose, 1--2 mm, base villous, glabrous towards apex. Style 4--12 mm. Fruit brown, oblong-ovate, 3--4 X 1.7--2.2(--3) cm, rust colored sericeous to pubescent to subglabrous, with persistent calyx and style, 1(--3)-seeded. Seeds ellipsoid, compressed, 2--2.5 X ca. 1.2 cm, both ends rounded; scar narrowly oblong.

1100-1800 m. Yunnan (Xishuangbanna Zhou)