Leaves : Bipinnate, pinnae 3-pairs, opposite, often with round insect-galls on their rachis. Leaflets 7-12 pairely, oblong, obliquely, rounded, mucronate at the apex.
Inflorescence : Axillary spikes.
Flowers :
Bracts small.
Calyx cup shaped, 5-toothed, corolla yellow, connate below, valvate.
Stamens 10, free, anthers crested with a deciduous gland.