Vine. Leaflets with conspicuous vein network beneath. Inflorescence erect or suberect. Corolla standard c. 1.2 x 1.8-1.9 cm, rounded at either side, pale mauve; wings c. 1 cm long, deeper mauve, ± oblique; keel enclosed by wings, upturned, white. Young pods flattened strongly; margins uneven and almost tuberculate. Uncommon.