Trees, to 10 m tall. Branchlets dark brown, ridged, glabrous, scattered with fine lenticels. Leaves 7-11(or 13)-foliolate; rachis 30-40 cm, including petiole 8-9 cm; stipels present; leaflet blades broadly oblong to obovate-elliptic, 8-16 × 4-8 cm, papery, both surfaces glabrescent, secondary veins 8-10 on each side of midvein, base broadly cuneate and slightly asymmetric, apex acute. Pseudoracemes axillary, 35-50 cm, longer than subtending leaf, thick, straight, slightly puberulent; rachis nodes ± whorled with 3-7 flowers clustered on a 2-4 mm spur. Pedicel 4-5 mm, brown puberulent. Flowers ca. 1.8 cm. Calyx ca. 7 mm. Corolla pale red to lilac; standard orbicular, without basal calluses, outside puberulent, base auriculate, apex purple striped. Ovary with trichomes, with numerous ovules. Legume linear, 8-22 × ca. 1.5 cm, leathery, apex beaked; sutures thickened. Seeds 5-8 per legume, olive-green, ellipsoid, ca. 1.5 × 8 mm. Fl. Mar, fr. Jun-Aug.
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