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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Acacieae
Genus: Acacia
Species: Acacia williamsonii

Acacia williamsonii Court, 1972

Acacia hakeoides var. angustifolia J.H.Willis
Acacia ligulata var. angustifolia H.B.Will.
Racosperma williamsonii (Court) Pedley

Native distribution areas:
Acacia williamsonii

Continental: Australasia
Regional: Australia

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Primary references

Court, A.B., 1972. Muelleria 2(3): 163, nom. nov.


Govaerts, R. et al. 2020. Acacia williamsonii in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 18. Reference page.
International Plant Names Index. 2019. Acacia williamsonii. Published online. Accessed: Aug 18 2019. 2019. Acacia williamsonii. Missouri Botanical Garden. Published online. Accessed: 18 Aug 2019.
Catalogue of Life: 2021 Annual Checklist
Acacia williamsonii – Taxon details on World Wide Wattle.

Vernacular names
English: Whirrakee wattle

Acacia williamsonii, known colloquially as Whirrakee wattle, is a species of Acacia that is endemic to the Bendigo region of Victoria. Naturalised populations also exist in Southern and Northern NSW.[3][4]


The shrub typically grows to a height of around 2 m (6 ft 7 in) and has a bushy habit with glabrous branchlets. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen phyllodes are inclined to ascending with a narrowly linear shape and a length of 4 to 9 cm (1.6 to 3.5 in) and a width of 1.5 to 3 mm (0.059 to 0.118 in) and are often slightly curved. It blooms between August and September producing spherical flower-heads that contain 15–20-flowered sub-densely packed bright golden flowers. After flowering firmly chartaceous to crustaceous, black coloured seed pods form that resemble and string of beads with a length of up to 9 cm (3.5 in) and a width of 3.5 mm (0.14 in) with longitudinally arranged seeds inside. The shiny black seeds have an oblong to elliptic shape and a length of 3.5 to 4 mm (0.14 to 0.16 in).[3]

It is endemic to parts of northern-central Victoria from around Inglewood in the south to Rushworth in the north with large populations found in the Whipstick Forest around Bendigo where it is found growing in stony gravel or clay-loam soils as a part of open Eucalyptus forest and mallee scrubland communities.[3]
See also

List of Acacia species


"Acacia williamsonii". Australian Plant Name Index, IBIS database. Centre for Plant Biodiversity Research, Australian Government. Retrieved 26 January 2020.
Court, A.B. (1972). "Notes on Australian Acacias 1 - A" (PDF). Muelleria. 2 (3): 163.
Royal Botanic Gardens Foundation Victoria. "Flora of Victoria: Acacia williamsonii Court". VicFlora.
Harden, G.J. (1990). "Acacia williamsonii Court". Plantnet - New South Wales Flora Online. Royal Botanic Gardens, Sydney. Retrieved 2 September 2014.

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