An erect shrub (0.3-)0.4-1 m tall, rather densely branched, with either slender and weak branches or spreading, straight, rigid branches functioning, when old, as thorns. Young branches white-villous or puberulous. Leaflets linear, (1.5-)3-8 mm long, weak, subterete (or slightly incurved), pale green, not becoming ferruginous when dry. Inflorescence unifloral (or bifloral), on lateral short-shoots, several to numerous scattered on the branches. Bract emerging on the basal half of the pedicel, 0.1-0.5 mm long, subulate or tooth-like, puberulous. Pedicel 1.5-2(-2.5) mm long, densely white-puberulous. Bracteoles 0.1-0.3 mm long. Calyx tube campanulate, usually puberulous (rarely glabrous); lobes short-triangular or tooth-like, 0.3-0.8(-1) mm long, obtuse or subacute, greenish, puberulous or glabrous. Petals light yellow or often partly purplish (not orange-red or ferruginous). Standard blade 4.3-5.5(-6) x (3-)3.5-4.7 mm, somewhat S-curved towards the apex, with ± incurved sides; short-sericeous on the apical third or glabrous (always with some basal pubescence). Wing blades narrow, 3-4.5 x 1.2-1.7 mm, glabrous, with 4-5 rows of minute folds on the basal upper parts. Keel blades lunate, 3.5-4.5 x 1.9-2.7 mm, glabrous. Pistil distinctly stipitate, sericeous on upper half of ovary and ciliate on upper side of basal half of style; ovules 2; stigma regular, capitate. Pod narrowly triangular-ovate, 6.3-8(-9) x 2.5-3.7 mm, sericeous on most parts.
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Erect shrublet with rigid branches becoming thorny, 0.3-1 m. Leaves 3-foliolate, leaflets subterete, weak, glabrous. Flowers 1(2) on short shoots, scattered, pale yellow, often partly purplish, wings and keel glabrous, calyx shortly hairy, sometimes glabrous, lobes reduced or tooth-like.
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