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Herbs annual. Stem erect or procumbent. Leaves paripinnate with rachis terminating in a tendril or mucro; stipules obliquely lanceolate; leaflets 2-to many paired, obovate, obovate-oblong, or obovate-lanceolate, margin entire. Inflorescence a 1-to many-flowered raceme. Flowers small. Calyx deeply divided into equal teeth at least 2 × as long as tube. Corolla white or otherwise colored; standard obovate; wings and keel with claw and auricle. Stamens diadelphous; staminal tube oblique at apex; filaments filiform. Ovary shortly stalked or subsessile; style dorsally compressed, pubescent on upper side. Legume short, strongly compressed. Seeds 1 or 2, brown, lenticular.
Leaves usually paripinnate, the rhachis terminating in a simple or rarely a branched tendril, or an awn, rarely imparipinnate; leaflets 2–several on each side of the rhachis, opposite or alternate, entire, folded flat lengthwise in bud; stipules linear to ovate or semi-sagittate, entire or dentate.
Corolla small, white, bluish or violet; standard obovate to almost round, cuneate to the base; wings oblong or obovate, adnate to the keel; keel shorter than the wings.
Inflorescences axillary, few-flowered, racemose or flowers solitary; bracts small, deciduous; bracteoles absent.
Ovary subsessile, 2-ovuled; style somewhat flattened, distally pubescent on the inner side.
Calyx 5-lobed; lobes subequal, subulate, at least twice as long as the tube.
Vexillary stamen free; anthers uniform.
Pod strongly compressed, 1–2-seeded.
Erect or spreading annual herbs.
Seeds lenticular, compressed.
