光叶白头树 guang ye bai tou shu

Trees, 8-15 m tall; bark greenish brown. Leaves with 11-17 leaflets; rachis and leaflet blades shortly pubescent; petiolules absent to 3 mm, terminal petiolule 2-25 mm; lowest leaflet blades stipulelike, oblong-elliptic, ca. 3 mm, early deciduous, middle blades ovate-elliptic or oblong-elliptic, 4-10 × 2-4 cm, base rounded or broadly cuneate, margin crenate-serrate, apex acute; lateral veins 10-15 pairs. Panicles axillary or lateral, fascicled toward ends of branches, 10-18 cm, pubescent with pale yellow hairs. Flowers yellowish white, ca. 6 mm; pedicel 1-4 mm. Sepals deltoid, pubescent on both surfaces. Petals oblong-lanceolate, 4-5 mm, abaxially pubescent. Stamens nearly equal; filaments tomentose at base; disk lobes deltoid-trapeziform. Ovary globose, ± shallowly 5-lobed, glabrous, with short stipe; style ± sparsely pubescent; stigma shallowly 5-lobed. Fruit globose, 10-23 × 12-16 mm. Fl. Apr-May, fr. Sep-Oct.

Sparse forests in valleys or at roadsides; 700-1000 m. S Yunnan (Xishuangbanna) [Cambodia, Thailand, Vietnam].