or climbing herbs. Leaves trifoliolate, stipules reflexed, stipels present,
lanceolate. Inflorescence axillary, falsely racemose. Calyx bilipped, upper entire, lower 3-lobed.
Corolla white or coloured, the standard round, auriculate with 2 callosities or
appendages on inner face, keels narrow, beak incurved at right angle. Stamens
diadelphous, 9+1, or loosely monadelphous, anthers uniform, upper stamens free.
Ovary styles laterally flattened, slightly curved at apex, hairy on inner side,
stigmas terminal. Fruits pod, oblong, many-seeded, septa spongy between seeds.
Seeds ovoid, compressed.