Unarmed trees. Leaves alternate, imparipinnate, 5-15 foliolate; leaflets alter-nate, with pellucid glandular dots and lines; stipules and stipels minute or absent. Inflorescences racemose, terminal and axillary; bracts and bracteoles caducous. Flowers pedicellate, small; calyx turbinate-campanulate, 5-lobed, subequal, val-vate in bud; petals 5, whitish, subequal, free, the standard larger than the wings, the keel narrow; stamens 10, free, subequal, exserted, the anthers uniform, ob-long, acuminate, sagittate, dorsifixed; ovary long stipitate, 2-ovulate near the apex, the style short, incurved, the stigma terminal, minute. Fruits stipitate, compressed, indehiscent, samaroid, 1-seeded at the apex, unequally winged ba-sally; seeds subreniform, resinous, the hilum elliptic, subapical. Chromosomes: n = 14.
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