A diffused, procumbent herb or undershrub, root stock woody, branchlets terete, silky-villous; leaves pinnately compound, 3-foliolate, tomentose; leaflets oblong- elliptic, apex mucronate, margin entire, coriaceous, prominently nerved, little pubescent beneath; petiole short; stipules large, scariose, adnate to the petiole, upper half with two spreading teeth, silky pubescent; bracts persistent, scarious, linear or lanceolate, striated, pubescent; flowers inconspicuous, 1 or few in terminal heads, polygamous, fertile ones apetalous; calyx tube relatively long, slender, teeth-5, filiform, 4-subconnate; corolla yellow, inserted at the throat of calyx tube, standard orbicular, wings oblong-obovate, keels subrostrate, incurved; stamens monadelphous 10, connate into staminal sheath, anthers dimorphous, filaments slender; ovary subsessile at the base of calyx tube, style long, slender, filiform; stigma minute, capitate; pods 1-2 flattened, rugose, jointed, tipped with basal part of style.