Tree to 37 m tall. Branchlets, leaf axes and inflorescence axes minutely puberulous. Leaves: axes usually with large sessile glands at pinnae and leaflet pairs; pinnae 1-2-jugate; leaflets with petiolules 3.5-7 mm long, 3-5-jugate, elliptic to elliptic-lanceolate, at first acute, finally obtuse, 2.8-10 cm long, 1.5-4.5 cm wide, glabrous. Inflorescences terminal, compound-racemose, to 35 cm long with fascicled peduncles 10-30 mm long bearing cream-coloured 20-30-flowered heads. Flowers glabrous except for minutely strigulose tips; calyx 1.5-2.5 mm long; corolla 4-7 mm long. Pod flat, narrowly oblong, 6-13.5 cm long, 20-25 mm wide, chartaceous, reticulate-venose, glabrous. Seeds flat, subcircular to oval, c. 12 mm diam. (including wing 0.5-1 mm wide), brown, dull.
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