Large tree 20-22 m high with open habit, deciduous; trunk with large girth, pale greyish white. Leaves with large leaflets on vegetative shoots, mostly absent at this time. Racemes curving upwards. Flowers with recuved or backward pointing standard, 6.5-7 x c. 3 cm across; wings c. 2 x1 cm, asymmetric, orange-red; keel 11-12 x 10-11 mm, dark shining, red. Does not fruit apparently.