Trees to 15 m tall, deciduous. Branchlets toward apex and rachis of inflorescences with prickles. Leaves without prickles, 7-17-foliolate; leaflet blades opposite, broadly ovate, ovate-elliptic, or oblong, but suborbicular basally on rachis, 10-20 × 4-10 cm, both surfaces glabrous, oil glands numerous, large, turning red or blackish brown and slightly protruding when dry, midvein adaxially impressed, base symmetrically or obliquely rounded to broadly cuneate, margin crenulate-serrulate. Inflorescences terminal, to 35 × 30 cm, many flowered. Flowers 5-merous. Perianth in 2 series. Sepals broadly ovate, ca. 0.3 mm. Petals white, ca. 2.5 mm. Male flowers: stamens 5; rudimentary gynoecium disciform, 3-lobed. Female flowers: carpels (2 or)3(or 4); staminodes small. Fruit follicles reddish brown, ca. 4.5 mm in diam., oil glands numerous, apex not beaked. Seeds ca. 4 mm in diam. Fl. Jun-Aug, fr. Sep-Nov.
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A shrub or tree. It grows 20 m tall. The leaves have 2-11 pairs of leaflets. They have pointed tips. There are very small teeth. The flowers are in clusters 15-25 cm long. They are in clusters at the ends of branches or in the axils of leaves. The fruit are 3-7 mm wide. The seeds are very small and black.
Forests and thickets at elevations of 100-1,230 metres in Malesia and from 200-2,145 metres in continental Asia.
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A subtropical plant. In China it grows in hill forests between 200-1,500 m above sea level. In Yunnan.
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