Annual or perennial woody climber, branchlets slender, densely pubescent, stipules small, deciduous, scarious, stipulate, leaves 3 foliolate, gland dotted below, up to 10 cm, terminal leaflet rhomboid or deltoid, laterals ovate, slightly oblique, densely, valvety pubescent on both surfaces, base obtuse, apex acuminate, margine entire; petiole up to 5 cm, bract large membranous, flowers in dense or lax, axillary racemes or panicles, upto 7 cm long; pedicel short; calyx long, pubescent, campanulate, teeth accrescent, scarious, lowest largest, boat shaped; corolla yellow, slightly exserted; petals clawed, standard auricled at base, wings oblong, keels incurved; stamens diadelphous, dimorphous; ovary subsessile; style filiform; stigma capitate; pods not jointed, oblique, 1-2 seeded.