Tree, 6-12(-20) m high, dbh up to 15 cm, bark white. Branchlets terete, 3-6 mm diam., ferrugineous-velutinous, early to late glabrescent, shiny greyish to purple-brown or black, scattered (often very sparsely) minutely pustular-lenticellate. Leaves (3-)5(-7)-jugate (those near the inflorescences 1-or 2-jugate), axial parts sparsely hairy, ± glabrescent, to tardily ferrugineous-velutinous; petiole ± flattened to grooved, at least at base, 3.5-8 cm long, base somewhat pulvinate; rachis above flat with a narrow keel; petiolules above flat to deeply grooved, 2-4(-10) mm long. Leaflets ovate (lower leaflets) to elliptic (upper leaflets), rarely obovate, (3-)5-10(-16) by (1.2-)1.5-4(-6.2) cm, index 2-3.5, thin-chartaceous, above shiny; base acute to rounded, distinctly attenuate; margin entire [to (partly) crenate]; apex obtuse to emargin-ate, mucronulate or not; midrib above slender, prominulous to slightly sunken, with a fine keel, beneath prominent and rounded; nerves 0.8-1 cm apart, slightly curved, only the upper ones more or less looped and joined towards the margin, prominulous on both sides; intersecondary nerves few; reticulations fine, prominulous on both surfaces. Inflorescences 7-30 cm long, with few erec-to-patent branches; latter sparsely rebranched, sparsely to densely fulvous-to ferrugineous-velutinous, cymules up to 7 mm long, with short stalk; pedicels slender, 2-3 mm long, hairy; bracts persistent, patent, linear, up to c. 6 by 1 mm, with a short petiole, chartaceous, margin recurved, apex acute, midrib distinct. Flowers creamy. Sepals: margin densely ciliate; outer broad-obovate to elliptic, 2.2-2.8 by 1.8-2.5 mm, thick, base broad, margin subentire; inner orbicular to elliptic, 2.2-3 by 1.8-2.8 mm, thinner, base narrow, margin crenu-late to entire. Disc broad and flat. Stamens: filaments thread-like, tapering from base to apex, 2.2-3.5 mm long; anthers basifixed, oblong, 1.2-2.3 mm long, at base cleft over c. 40%, at the apex with a rounded (glandular?) appendage. Ovary sharply trigonous-ellipsoid, c. 2.5 mm high; style slender, c. 3 mm long, stigmatic part curved in old flowers. Infructescences sometimes still velutinous; sepals persistent and slightly accrescent. Fruits 2.5-3.5 by 1.5-2.5 cm; wings coriaceous, up to 1 cm broad, centrally widest or broadening from base to apex, apically connate, either emarginate or tapering into the 3-4 mm long style rest; pericarp c. l mm thick. Seeds with basal, orbicular, small hilum; testa shining blackish-brown.
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