Tall, unarmed trees, the leaves large, bipinnate, with numerous, small leaflets. Inflorescence axillary or terminal, racemose, or paniculate of several racemes; bracts small. Flowers yellow, perfect; calyx with a short, somewhat inequilateral tube, the lobes imbricate, longer than the tube, reflexed in anthesis; petals separate, im-bricate, narrowed baseward, subequal; stamens 10, free, subdeclinate, inserted with the petals on upper portion of calyx-tube; the anthers all similar, small, bilocular, versatile, dehiscent by longitudinal slits; ovary stocky, tomentose, short-stipitate, affixed basally on lower side to the calyx-tube; style about twice as long as the ovary; stigma terminal, minute. Legume flattened, coriaceous, tardily dehiscent, bearing a single seed in the expanded apical portion.
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Trees. Stipules caducous. Leaves spiral, bipinnate; pinnae opposite or subopposite. Leaflets petiolulate, opposite or subopposite. Inflorescences axillary or terminal, simple racemose, or paniculate of racemose units; bracts and bractoles caducous. Hypanthium present. Calyx 5-lobed, lobes more or less regular or zygomorphic, imbricated. Petals 5, imbricate, clawed. Stamens 10, free, all or 9 fertile; anthers dehiscent introrsely or longitudinally. Ovary stipitate, excentric with adnate stipe, 4-ovuled; style filiform; stigma obscure. Pods one-seeded, opening at apex. Seeds albuminous.
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