Tall shrubs or small  trees to 7 m high; branchlets slightly angular hoary, smooth, reddish-brown; bark thick, corky, grey, deeply furrowed. 

<P>Phyllodes linear, 12-35 cm long, 1-6 mm broad, straight or curved, coriaceous, flat or almost terete, covered with fine silvery hairs with numerous fine obscure close parallel longitudinal veins; glands small, usually 2-10 mm from the base. 

<P>Inflorescences axillary in short, finely pubescent racemes, consisting of 2-5 heads; flower-heads globular, mid-yellow, 30-40-flowered; peduncles pubescent, 8-15 mm long; flowers 5-merous (sepals united). 

<P>Legumes moniliform, 15-23 cm long, 8-10 mm broad, coriaceous, fibrous, curved and twisted, lightly striate, covered with fine whitish hairs. seeds longitudinal in legume; funicle short, sometimes slightly twisted or folded, thickening into a large fleshy yellow aril.