Acacia rigens A.Cunn. ex Don


Gen. Hist. 2: 403 (1832)

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Spreading shrub or tree, to 6 m high; branchlets strongly yellow-ribbed, with appressed, minute hairs between glabrous ribs. Phyllodes terete to linear-compressed, 3–14 cm long, 0.8–1 mm diam. (subterete variant) to 2.5 mm wide (compressed variant), straight to shallowly curved, rigid, with appressed, minute hairs, sometimes glabrous between veins, apex sharply to coarsely pungent and often curved; veins numerous, closely parallel, raised, yellowish; gland basal. Peduncles 2–6 mm long, 2 per node, with appressed, minute hairs; heads globular, 4–8 mm diam., 20–33-flowered, golden, sometimes resinous; bracteoles spathulate. Flowers 5-merous; sepals free to half united. Pods linear, raised over and constricted between seeds, 3.5–10 cm long, 2–3 mm wide, chartaceous to coriaceous, straight to slightly curved, sometimes with appressed, minute hairs; seeds longitudinal, oblong-elliptic to narrowly elliptic, 3–4.5 mm long, glossy, pale brown, aril apical, conical. Flowers Aug.–Nov.

CVU, Gold, GGr, LoM, MuF, MuM, RobP, VRiv, Wim. Also WA, SA, Qld, NSW. In north-west Victoria extending south to Mt Arapiles and east to Rochester. Commonly grows in sandy soils but also on red and shaley soils, mostly in mallee scrub. A single collection was purportedly from the You Yangs.

Similar to A. havilandiorum but with ribbed branchlets that are minutely pubescent between the ribs, similar-appearing phyllodes but with more prominently raised veins and minutely pubescent intervein spaces, a basal gland, minutely pubescent peduncles, spathulate bracteoles and regularly 5-merous flowers. A specimen from the Little Desert is entirely glabrous and has a gland 1.5–2.5 mm above the pulvinus, but otherwise matches A. rigens rather than A. havilandiorum.

See notes under Acacia sp. aff. rigens (Gerang Gerung).

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.
Updated by: Daniel Ohlsen, 2017-06-21
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 rigens in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Acacia rigens in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Victorian Riverina present native
Robinvale Plains present native
Murray Fans present native
Gippsland Plain present cultivated
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native

State distribution

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