Shrubs or undershrubs up to 3 m tall; branches diffused, terete, glabrous or sub-glabrous, young parts pubescent; leaves about 12 cm long; petiole with a conical or globular gland; stipules caducous; leaflets 6-12 pairs, oblong, lanceolate, opposite, subcoriaceous, acute, entire; inflorescence simple or compound, corymbose racemes, axillary or terminal; bract ovate, small; flower yellow, 2 cm across; calyx lobes 5, obtuse, greenish yellow; petals 5, subequal, ovate, obtuse, yellow; stamens 10, upper 3-4 reduced to staminodes, remaining perfect; ovary stipitate, pilose, style incurved; pods linear, oblong, turgid, not torulose when mature, straight or slightly curved; seeds 30-40, broadly ovoid, flat, acute, compressed, dark brown.