Acacias of Australia

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Acacia semilunata Maiden & Blakely




Scattered in south-eastern Qld, from Knockbreak Stn S to near Stanthorpe.


Shrub or tree to c. 5 m high. Branchlets terete, sometimes pruinose, normally sparsely to moderately pubescent with straight spreading hairs, rarely glabrous. Phyllodes somewhat crowded, on raised stem-projections, mostly inequilaterally narrowly elliptic to oblong-oblanceolate with the lower margin ±straight and upper margin curved, 1.5–3 cm long,
4–9 (–11) mm wide, excentrically mucronate to rostriform, thin, grey-green to glaucous, pruinose when young, glabrous except few marginal hairs near base; midrib ±central; lateral nerves obscure; gland not prominent, 6–12 mm above base, sometimes absent. Inflorescences racemose and aggregated in upper axils, sometimes in terminal panicles; raceme axes 2–6 (–12) cm long, normally glabrous; peduncles 2–6 mm long, normally glabrous; heads globular, 15–20-flowered, golden. Flowers 5-merous; sepals c. 3/5–3/4-united. Pods linear, shallowly curved, to 8 cm long, 4–5 mm wide, firmly chartaceous, pruinose, glabrous. Seeds longitudinal, oblong, 4–4.5 mm long, slightly shiny, black; aril clavate.


Grows in eucalypt communities on plains in sand or sandy loam or on low rocky hills.


Qld: 65.7 km SW of Cecil Plains, M.E.Ballingall 2096 (PERTH); 6.7 km N of Miles towards Wandoan, N.Hall H77/52 (NSW); 14.5 km W of Inglewood, R.W.Johnson 530 (BRI); Forest Reserve 4, Braemar (near Kogan), 20 Nov. 1968, E.J.Rider s.n. (BRI).


Appears most closely allied to A. cultriformis, fide L.Pedley, Austrobaileya 1: 280 (1980). Similar to A. lunata, especially in phyllode shape, size and indumentum, and short calyces which are c. 1/3 the length of the corolla.

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 J.Rogers