Shrubs or small trees to 6 m high with a silvery-blue foliage, at first conical with branches to the ground but later develops a short trunk with a rounded canopy; branchlets ridged and somewhat furrowed often pruinose more or less pubescent with short spreading hairs. <P>Leaves bipinnate, glaucous; petiole short, 2-5 mm long; rachis 1-3 cm long, with a gland at the junction of usually only the top few pinnae pairs; pinnae 2-6 pairs, crowded; pinnules 12-20 pairs, linear-oblong, 5-7 mm long, 1-1.5 mm broad, flat, slightly curved usually glabrous but sometimes with a few marginal hairs. <P>Inflorescences in axillary racemes or panicles longer than leaves; flower-heads globular, bright yellow 20-25-flowered; peduncles pruinose, glabrous, c. 6 mm long; flowers 5-merous. <P>Legumes 4-10 cm long, 8-12 mm broad, straight or slightly curved, flattish, brown, pruinose or glaucous when young, margins almost straight or slightly irregularly constricted. Seeds longitudinal in legume; funicle short and filiform, aril small.<P>