Shrub to small tree; twigs angled, ± glabrous or with few to many, very fine appressed hairs. Lvs 2-pinnate, alternate, glabrous or with fine appressed hairs on rachis and sparsely ciliate pinnules; pinnae in (5)-8-12-(14) pairs; pinnules in 20-40 pairs, close set to widely spaced, dark green, narrow-oblong, obtuse or subacute, entire, 2-4-(5) × c. 0.5 mm; petiole 15-35 mm long; stipules inconspicuous; solitary glands present between each pair of pinnae including basal pair, additional, smaller solitary glands usually present between the pairs of pinnae. Infl. of numerous, many-flowered, pale yellow, globose heads; heads arranged in axillary, simple or compound racemes ± = lvs. Fls 5-merous, sessile. Pod glabrous, straight, 30-120 × 4-7 mm; aril scarcely folded, thickened below and to one side of seed.