Unarmed trees or shrubs. Leaves imparipinnate; leaflets alternate to subop-posite, subcoriaceous; stipules minute and caducous or none, reduced to tufts of hairs; stipels none. Inflorescences racemose, sometimes paniculate, terminal or axillary, 5-20 cm long; bracts small, deltoid or linear, persistent or caducous; bracteoles none. Flowers 10-several hundred, 5-14 mm long; calyx regular, cam-panulate, valvate or subimbricate in bud, truncate or shortly dentate, 5-lobed, the teeth ca. 0.5 mm long; petal 1, white or yellowish, clawed, cucullate, some-times expanded, spatulate at anthesis, glabrous or pubescent, the margin erose or sinuate; stamens free, the anthers uniform, ellipsoid, ca. 1 mm long, dorsifixed; ovary 1-2 ovulate, the stigma subsessile, ovate, obliquely terminal, inflexed. Fruit indehiscent, samaroid, semiorbicular, a narrow wing along the upper suture, 2 valved, usually 1 seeded, compressed stipitate; seeds reniform, compressed, reddish brown to dark brown, the hilum lateral, orbicular or elliptic. Chromo-somes: n = 20.
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