Shrub commonly 0.2-0.5 (-1) m high. Branches light grey, scarred where phyllodes have fallen. Branchlets hirsute-hirsutellous to puberulous. Stipules often ±spinose, c. 2 mm long, slender, straight. Phyllodes somewhat crowded, subsessile, normally ±patent, terete to compressed, 4-10 mm long, 1-2 mm wide, pungent, often narrowed towards apex, rigid, green, glabrous or sparsely hirsutellous, normally medially sulcate upon drying; nerves rarely evident. Inflorescences rudimentary 1-or 2-headed racemes with axes > 0.5 mm long; peduncles 7-14 mm long, glabrous; heads globular, 16-23-flowered, light golden. Flowers 5-merous; sepals united or divided to base. Pods linear to narrowly oblong, to c. 10 cm long, 5-7 mm wide, thinly coriaceous-crustaceous, ±black, with a yellowish medial stripe internally, glabrous. Seeds longitudinal, 4.5-6.5 mm long, oblong-elliptic, dull, light brown; aril terminal, conical.
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