Shrub to large tree; twigs ribbed, densely puberulent. Lvs 2-pinnate, alternate, densely puberulent on rachis and sparsely hairy on pinnules; pinnae in (6)-10-21 pairs; pinnules in 25-40-(50) pairs, fairly close set, glaucous, narrow-oblong, obtuse or subacute, entire, 2-4-(7) × c. 0.75 mm; petiole (5)-10-20 mm long; stipules inconspicuous; solitary glands present between each pair of pinnae, usually except basal pair. Infl. of numerous, many-flowered, medium yellow, globose heads arranged in axillary, compound racemes ± = lvs. Fls 5-merous, sessile. Pod glabrous, ± straight, 50-100 × 8-12 mm; aril scarcely folded, thickened to one side of seed.