Acacias of Australia

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Acacia obtusata Sieber ex DC.

Common Name

Blunt-leaf Wattle, Obtuse Wattle




Extending from the Budawang Ra. N to near Mt Coricudgy, N.S.W.


Spindly shrub rarely exceeding 2.5 m high. Branchlets dark reddish, glabrous. Phyllodes oblanceolate to narrowly oblong-oblanceolate, sometimes ±narrowly elliptic, straight to shallowly incurved, 4–11 cm long, 5–16 (–20) mm wide, narrowed at base, obtuse, sometimes ±acute, coriaceous, lightly glaucous, glabrous; midrib and marginal nerves rather prominent; lateral nerves obscure; gland 0.5–4 cm above pulvinus, sometimes ±touching midrib or connected to it by a fine oblique nerve; margin often indented at gland. Inflorescences 5–14-headed racemes; raceme axes 1–5 cm long, glabrous; peduncles normally 3–5 mm long, substout, glabrous; heads globular, subdensely 15–27-flowered, golden; bracteole laminae transversely elliptic, dark brown, densely white-fimbriolate. Flowers 5-merous; sepals c. 5/6‑united; petals 1-nerved. Pods to 10 cm long, (8–) 10–12 mm wide, chartaceous, blackish, glabrous. Seeds longitudinal, oblong to elliptic, 5 mm long, ±dull, black; aril clavate.


Scattered on tablelands, in sand, in dry sclerophyll forest, sometimes in moist sites.


N.S.W.: Mt Houghton, Budawang Ra., B.G.Briggs 4771 (NSW); Mt Coricudgy area, 64 km E of Rylstone, K.Moxon 76/6 (NSW); Barbers Ck, Aug. 1898, H.J.Rumsey (A n.v., AD n.v., B n.v., BRI n.v., CANB, E n.v., L n.v., MEL n.v., MO n.v., NSW, NY n.v., PE n.v., PERTH, TL n.v., UC n.v., US n.v., Z n.v.).


Allied to A. hamiltoniana.

FOA Reference

Data derived from Flora of Australia Volumes 11A (2001), 11B (2001) and 12 (1998), products of ABRS, ©Commonwealth of Australia


Minor edits by B.R.Maslin & J.Rogers