Acacias of Australia

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Acacia denticulosa F.Muell.

Common Name

Sandpaper Wattle




Scattered populations from E of Mt Churchman S to near Nungarin and W at Wongan Hills, W.A.


Shrub 1–4 m high, open, spindly. Branchlets resinous at first, coarsely verrucose-scabrous, (tips of hairs soon eroded leaving tubercle-bases). Phyllodes spreading, inequilaterally widely elliptic to ovate, 5–9 cm long, 3.5–7.5 cm wide, strongly undulate and with irregularly denticulate margins, acute, mucronate, thickly coriaceous, dark green, prominently 3- or 4-nerved with a prominent coarse reticulum in between; venation ±verrucose-scabrous. Inflorescences simple; peduncles 3–7 mm long, scabrous, resinous; spikes 25–80 mm long, 6–8 mm diam., dense, golden. Flowers 4-merous; sepals free. Pods linear, strongly raised over seeds, straight to slightly curved, to 7.5 cm long, 3–4.5 mm wide, glabrous. Seeds longitudinal, elliptic to broadly elliptic, 3.5–4 mm long, glossy, brown-black; aril terminal.


Grows in sand, loam, silt and clay, on and around granite hills and outcrops, rarely on sandplains.


W.A.: Wongan Hills area [precise locality withheld for conservation reasons], B.R.Maslin 4544 (CANB, K, PERTH); Barbalin, K.Newbey 2875 (PERTH); 40 km E of Mt Churchman, Oct. 1983, R.Paynter (PERTH); near Nungarin, 1 Sept. 1919, E.Simpson (PERTH).


Affinities unknown.


Gazetted a rare species in W.A.

FOA Reference

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


B.R.Maslin, R.S.Cowan