Trees, 8-25 m tall. Branchlets red-brown, obviously lenticellate. Leaf petiole 6-8 cm; glands elliptic, flat; pinnae 2 pairs; leaf rachis 16-24 cm; petiolules 5-8 mm; leaflets 4 pairs, opposite, with 1 gland per leaflet pair, oblong or oblanceolate, (5-)10-18 × 3-6.5 cm, abaxially ferruginous pubescent, more densely so on veins, adaxially glabrous or very sparsely ferruginous pubescent, lateral veins 5-7 pairs, conspicuous on both surfaces, base attenuate or obtuse, apex shortly acuminate. Flowers sessile, ca. 20 in globose head, heads arranged in panicle ca. 20 cm, ferruginous tomentose, branches sparse. Calyx cup-shaped, ca. 1.5 mm. Corolla tube ca. 2.5 mm; lobes 5, ca. 2 mm. Staminal tube equaling corolla tube; filaments 8-10 mm. Ovary stipitate, glabrous. Legume cylindric, 7-15 × ca. 6 cm. Seeds 2-6, bullet-form at both ends, middle ones shortly cylindric, ca. 4.5 cm high and in diam. Fl. Apr-May, fr. Jul.
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