Trees to 30 m tall. Leaves even-pinnate, rarely odd-pinnate, 8-16(-25) cm; petiole 2-6.5 cm, sparsely pubescent; rachis often winged or sometimes only ridged or sulcate on some leaves, sparsely pubescent to tomentose; leaflets (6-)11-21(-25), sessile, long elliptic to elliptic-lanceolate, 8-12 × 2-3 cm, abaxially slightly pubescent, base oblique, cuneate or broadly cuneate, apex obtuse or acute. Fruiting spike 20-45 cm, axis pubescent at first but becoming nearly glabrous. Nutlets long ellipsoid, 6-7 mm, slightly pubescent to glabrescent; wings linear, 1.2-2.5 × 3-6 mm. Fl. Apr-May, fr. Aug-Sep. 2n = 32.