Tree. Leaves imparipinnate; stipules small; stipels lacking; lateral leaflets mostly opposite or subopposite, the proximal ones sometimes more alternate, glandular-punctate. Flowers in terminal and axillary racemes; bracts small; bracteoles absent. Calyx campanulate, glandular; lobes a little shorter than tube, the upper 2 more united than the others. Petals subequal in length, glabrous; standard with short claw and broadly elliptic to oblate emarginate blade, thickened and with 2 slight calluses at base of blade; wings ± oblong, rounded at apex, the blade slightly to distinctly auriculate at the base and slightly pouched; keel-petals similar but a little narrower, free or lightly coherent on the lower side. Stamens free; anthers dorsifixed. Ovary shortly stipitate, 1-ovulate; style curved, attenuate, glabrous on upper part, with a small terminal stigma. Fruit flat, papery, indehiscent. Seed oblong-ovate in outline, with the small hilar sinus near the narrow end; radicle short, inflexed.
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