Tall, viscid shrubs or small trees 2-6 m high, with short thin trunks and long ascending branches; branchlets angular, with somewhat resinous ridges or the entire branch covered with a blackish sooty substance. <P>Phyllodes lanceolate or linear-lanceolate, 4-10 cm long, 4-10 mm broad, flat, punctate, quite viscid and sticky when young, becoming less viscid when mature; central vein prominent, sometimes with 2 additional fainter inter-marginal veins into which finer lateral veins run; apex acute, with a short straight or recurved point; glands small 1--4 scattered at various intervals along the upper margin. <P>Inflorescences axillary, mostly twin, sometimes on a very short common peduncle; flower-heads globular, bright yellow, 30-40-flowered; peduncles glabrous, viscid, 10-15 mm long; flowers 5-merous. <P>Legumes linear, straight or curved, 6-10 cm long, 5-6 mm broad, light brown, raised over the seeds; margins not constricted. Seeds longitudinal in legume, obloid-ovoid, dark brown, shiny; funicle short, folded under the cup-shaped aril.