Glabrous tree, to 28 m, with few thick branches bearing terminal clusters of large leaves. Leaves imparipinnate, up to 1.25 m; petiole to c. 16 cm, base slightly dilated; petiolules c. 2-4 mm; leaflets lanceolate or oblong-lanceolate, c. 10-20 by 2-4 cm, papyraceous, margin crenulate, apex acuminate, base truncate or rounded, often oblique, midrib prominent, lateral veins numerous, faint. Inflorescence a panicle; primary axis stout, c. 15 cm, bearing crowded secondary axes along its length and in a subumbellate cluster at its apex, bracts triangular, c. 3 mm long, caducous; secondary axes 20-30(-40) cm; umbellules borne racemosely along the secondary axes (often in subverticils) on peduncles 2-5 cm long, usually bearing 2 minute bracts. Flowers c. 8-12 in an umbellule, pedicels c. 5 mm. Calyx a minute rim. Petals 2½ mm long. Stamens 5. Ovary turbinate, 2 mm high, 3-4-celled, disk rising to the central styles. Fruit globose, 4-5 mm high (when dry), 3-4-ribbed, styles 3-4, divergent, persistent.
In rain-forest, gallery forest and secondary growths, usually above 1500 m (to 3000 m), but occasionally as low as 500 m.
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