Acacia aculeatissima J.F.Macbr.

Thin-leaf Wattle

in J.F.Macbr., Contr. Gray Herb, new ser., 59: 6 (1919) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Diffuse shrub, prostrate to 0.5 m high, rarely more; branchlets slender, finely ribbed, variously covered with short stiff hairs, rarely glabrous. Phyllodes inclined, spreading and/or reflexed, terete to subterete (more or less quadrangular when dry), 5–12(–20)mm long, 0.5–1 mm wide, slender, rigid, pungent, cusp slender and c. 1 mm long, pulvinus asymmetric, glabrous or less commonly hairy; veins 4, often minutely and irregularly papillose; stipules c. 1 mm long. Peduncles 1–3 per axil, 5–13 mm long, slender, glabrous, basal bract c. 1 mm long; heads globular, sometimes obloid, c. 20-flowered, lemon-yellow. Flowers 4-merous; sepals free to near base. Pods linear, biconvex, to 6 cm long, 3–4 mm wide, firmly chartaceous, straight to shallowly curved, glabrous; seeds longitudinal, oblong, 3.5–4 mm long, aril terminal. Flowers Aug.–Oct.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HFE, HNF, HSF, MonT, NIS, OtP, OtR, VVP. Also NSW. Widespread and sometimes locally abundant, often growing in rocky areas in Eucalyptus woodland or forest or closed heath.

Plants with hairy phyllodes are common in the Grampians but occur less frequently elsewhere (e.g. Muckleford, Swanpool). Phyllodes vary in size and orientation between populations, sometimes few being reflexed.

Differs from A. ulicifolia and A. brownii in having phyllodes often reflexed, and flowers 4-merous. See also notes under A. genistifolia.

Source: Entwisle, T.J.; Maslin, B.R.; Cowan, R.S.; Court, A.B. (1996). Mimosaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Fabales
family Fabaceae
genus Acacia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Acacia aculeatissima in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Acacia aculeatissima in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Monaro Tablelands present native
Highlands-Far East present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales