Trees, 9-16 m tall. Bark dull gray, furrowed; young shoots slightly puberulent. Leaves 15-18 cm; rachis and petioles brown puberulent; leaflets (7-)9-11; petiolules 3-4 mm, brown puberulent; blades ovate or elliptic, 3-5.5 × 2-2.5 cm, papery, both surfaces yellowish brown appressed puberulent when young, subglabrous when old, base rounded or broadly cuneate, apex shortly acuminate, obtuse at tip. Panicles axillary, 4-9(-13) × 4-10 cm, slightly brown puberulent. Flowers small, initially orbicular; bracteoles ovate to suborbicular. Calyx ca. 5 mm, brown puberulent as pedicels, 5-toothed; teeth unequal. Corolla pale pink; petals each with long claw 2-2.5 mm; standard obovate-oblong, ca. 9 × 5 mm; wings rhombic-oblong, 9-10 × ca. 3 mm; shorter keel and wings with downward auricles on upper side. Stamens 10, diadelphous (5+5). Ovary shortly stipitate, linear, densely puberulent except on style, 1-3-ovuled. Legume straight or slightly curved, oblong, oblanceolate, or strap-shaped, 5-9 × 1.5-1.8 cm, brown puberulent, obscurely prominent and reticulate opposite 1(or 2) seeds, base cuneate, attenuate to a short stipe, apex acute. Seeds reniform, compressed. Fl. Mar-Apr, fr. May-Jul.
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