Erect, glabrous, rigid, prickly, somewhat diffuse, viscid shrubs with a resinous odour, 1-2.5 m high; branches light green, slightly angular or marked with striate resinous ridges; bark dark grey near base. <P>Phyllodes linear-lanceolate to narrowly triangular, broad and swollen at the base, 1.5-2.5 cm long, 1.5-2.5 mm broad, a mid-vein prominent and raised, margins thickened. <P>Inflorescences simple and axillary, solitary; flower-heads globular, creamy yellow, c. 20-flowered; peduncles viscid, 5-15 mm long; flowers 4-merous. <P>Legumes linear, 4-7 cm long, 3-5 mm broad, usually curved; surface rugose, margins pale, slightly thickened and scarcely constricted between the seeds, apex acute. Seeds longitudinal in legume; funicle much folded and thickening into a broad aril covering the base of the seed.