WATTLE

Acacias of Australia

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Acacia aneura F.Muell. ex Benth.

Common Name

Mulga

Family

Fabaceae

Distribution

Widespread in all mainland States except Vic.

Description

Shrub or tree 2.5–7 (–10 m) high, often multistemmed with bushy crowns, rarely with a conifer or pseudo-confier growth form. Branchlets obscurely ribbed or ribless, ribs not resinous or with a normally thin layer of translucent resin; new shoots resinous, with a dense layer of dark-coloured glandular hairlets. Phyllodes narrowly linear to linear-elliptic, mostly shallowly incurved, not rigid, flat, 4–12 (–18) cm long, (1–) 1.5–3 (–4) mm wide, 2–3 cm long and clustered in groups of 2 or 3 on juvenile plants, glabrous or obscurely appressed-hairy between nerves, normally grey-green to sub-glaucous and often with a silvery sheen, longitudinal nerves numerous and very fine, margins not resinous; gland 0–1 (–3) mm above pulvinus. Inflorescences mostly simple; peduncles 4–10 (–15) mm long, sparsely to ±densely sericeous with commonly some red-brown glandular hairlets; spikes (10–) 15–30 (–40) mm long. Flowers 5-merous; sepals free, ½–¾ length of petals, normally linear-spathulate. Pods mostly straight-edged, flat, (1–) 1.5–4 cm long, (6–) 7–15 mm wide including the wing 0.4–1 (–2) mm wide, chartaceous to firmly chartaceous, normally brown to grey-brown, glabrous or sparsely appressed puberulous, obscurely reticulate; margins winged or rarely bevel-edged, often shiny-resinous. Seeds transverse to oblique, 3.5–5 mm long, 2.5–3 (–3.5) mm wide, elliptic to oblong or ovate; aril small aril, whitish or cream.

Habitat

Recorded from a wide range of habitats.

Specimens

W.A.: 80 km SSW of Kintore, Mu Hills, P.K.Latz 20893 (NT, PERTH); Hamersley Ra., Juna Downs Stn, Flat Rocks, along Hamersley Iron access road to Yandi ore deposit, B.R.Maslin 8064 (CANB, PERTH); 22.5 km E of Leonora on rd to Laverton, B.R.Maslin, J.Miller & J.E.Reid BRM 9352 (PERTH). N.T.: N.T.: 15 miles [24 km] N of Alice Springs, D.J.Nelson 2232 & 2233 (BRI n.v., DNA n.v.). S.A.: Yappala Ra., 8 km NW of Hawker, D.E.Murfet 4397 (AD). Qld: near ‘Buckingham Downs’, c. 50 km S of Dajarra, L.Pedley 5296 (BRI n.v.). N.S.W.: 8 km NE of Louth, L.Pedley 4706 (A n.v., BRI n.v., IL n.v., L n.v., MEXU n.v., MO n.v., PERTH).

FOA Reference

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

Author

Revised by B.R.Maslin & J.Reid

L.Pedley