Acacia decurrens Willd.

Early Black-wattle

Sp. Pl., edn 5, 4: 1072 (1806) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Tree 10–15 m tall; bark deeply fissured, dark grey to black; branchlets prominently angled, with wing-like ridges, glabrous except for new tips. Leaves bipinnate, dark green, decurrent; rachis 4–12 cm long, angular, glabrous (minutely hairy when young), with a raised gland just below the junction of each pinna pair; pinnae in 5–15 pairs; pinnules in 15–40 pairs, well-separated, linear, 5–15 mm long, 0.5–0.8 mm wide, within a single pinna more or less equal in length, glabrous (minutely hairy when young), apex more or less rounded. Inflorescence a raceme or panicle; heads globular, 20–30-flowered, bright yellow, peduncles 4–7 mm long. Pod flattish, straight or slightly curved, 5–10 cm long, 4–11 mm wide, slightly constricted, dark brown, margins thickened. Flowers Jul.–Sep.

*CVU, *DunT, *EGL, *GipP, *Glep, *Gold, *GGr, *HNF, *HSF, *LoM, *NIS, *OtP, *VAlp, *VRiv, *VVP, *Wim. Native to NSW; also naturalised Qld, SA, Tas. Widely established in dry to moist open-forest and woodland.

Acacia decurrens is characterized by its glabrous, well-spaced pinnae and branches with wing-like ridges.

Hybrids between Acacia decurrens and A. baileyana are known from a few localities in western Victoria.

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 decurrens in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Acacia decurrens in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present naturalised
Wimmera present naturalised
Glenelg Plain present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Greater Grampians present naturalised
Dundas Tablelands present naturalised
Northern Inland Slopes present introduced
East Gippsland Lowlands present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised
Victorian Alps present introduced

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory