Trees to 16 m tall, deciduous. Young branches light red, pubescent. Leaves odd pinnate, 12-50 cm; leaflets 7-15, abaxially pale, adaxially dark green, ovate on lower axes, narrowly ovate or narrowly oblong at middle, narrowly elliptic at apices, 4-15 × 1.5-4.5 cm, papery, abaxially pilose on veins, adaxially glabrous except on midvein and lateral veins, lateral veins 6-15 pairs, ascending, anastomosing 3-5 mm from margin, crinite on vein axils, base usually broadly rounded, margin spinose-serrate, apex acuminate. Panicle terminal or axillary at apices of branches, 15-20 cm, axis triangular, branched 3 times, brown pubescent. Pedicel ca. 1 mm. Flowers ca. 3 mm in diam. Sepals 5, elliptic-ovate, 1-1.2 mm, 2 outer ones smaller, pubescent abaxially, ciliate. Petals yellow: 3 outer ones flat-orbicular, ca. 2.5 mm wide, 5-7 veins distinct; 2 inner ones subequal to filaments, 3-lobed, midlobe very small, lateral lobes ovate, ciliate. Fertile stamens 1.2-1.5 mm. Pistil ca. 1.5 mm; ovary pubescent; style equal to ovary. Drupe globose, 3-5 mm in diam., convex, with coarse, scattered netlike strips, midrib obscurely prominent. Fl. Jun-Jul, fr. Aug-Oct.

● Forests; 900-2000 m. S Sichuan, Yunnan.