Plant: Tree or shrub Leaves: Tree or shrub; leaves alternate, with one pair of pinnae; leaflets about 3-5 times longer than wide, to 10 mm long, 11 to >20 pairs/pinna Flowers: inflorescence a dense, spikelike cylinder, 6-9 cm long; flowers numerous, crowded, pale yellowish, 4-5 mm long; Fruit: pods strait to moderately curved, 10-20 cm long, slightly constricted between seeds. References: Shreve and Wiggins 1964.J.C. Hickman, ed. The Jepson Manual.