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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 congesta
Subspecies: A. c. var. cliftoniana – A. c. var. wonganensis

Acacia congesta Benth., 1842

Acacia baxteri Meisn.
Acacia collina E.Pritz.
Racosperma congestum (Benth.) Pedley

Native distribution areas:
Acacia congesta

Continental: Australasia
Regional: Australia
Western Australia

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

Bentham, G., 1842. London Journal of Botany. London 1:327.


Govaerts, R. et al. 2020. Acacia congesta in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Jul 29. Reference page.
International Plant Names Index. 2019. Acacia congesta. Published online. Accessed: Jul 29 2019. 2019. Acacia congesta. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Jul 29.
Hassler, M. Jul. Acacia congesta. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. Jul. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: Jul 29 {{{3}}}. Reference page.
USDA, ARS, Germplasm Resources Information Network. Acacia congesta in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names

Acacia congesta is a shrub belonging to the genus Acacia and the subgenus Phyllodineae endemic to Western Australia.


The spreading shrub typically grows to a height of 0.5 to 2.5 metres (2 to 8 ft).[1] It has dark grey bark on the trunk and larger branches. The glabrous or hairy branchlets have spinose stipules and a grey to white coloured epidermis that becomes fissured as it gets older. The pungent, dark green phyllodes are variable with a length of 5 to 30 mm (0.20 to 1.18 in) and a width of 3 to 7 mm (0.12 to 0.28 in) and have a prominent midrib and obscure to pronounces lateral nerves.[2] It blooms from August to September and produces yellow flowers.[1]

The species was first formally described by the botanist George Bentham in 1842 as part of William Jackson Hooker's work Notes on Mimoseae, with a synopsis of species as published in the London Journal of Botany. It was reclassified as Racosperma congestum in 2003 by Leslie Pedley then transferred back to the genus Acacia in 2006. The only other synonym is Acacia collina.[3] There are three recognised subspecies:

Acacia congesta subsp. cliftoniana[4]
Acacia congesta subsp. congesta
Acacia congesta subsp. wonganensis[5]


It is native to an area along the west coast in the Mid West and the Wheatbelt regions of Western Australia[1] where it has a discontinuous distribution from Geraldton in the north down to around Wongan Hills in the south.[2] It grows among rocky outcrops and hilltops in stony lateritic clay soils[1] as part of open woodland or low shrubland communities.
See also

List of Acacia species


"Acacia congesta". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia congesta". World Wide Wattle. Western Australian Herbarium. Retrieved 4 March 2019.
"Acacia congesta Benth". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 4 March 2019.
"Acacia congesta subsp. cliftoniana". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia congesta subsp. wonganensis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.

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