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Acacia brachybotrya

Acacia brachybotrya. Moonah, the Edward River, Riverina NSW.

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 brachybotrya

Acacia brachybotrya Benth., 1842

Acacia brachybotrya var. glabra (Benth.) Maiden
Racosperma brachybotryum (Benth.) Pedley

Native distribution areas:
Acacia brachybotrya

Continental: Australasia
Regional: Australia
New South Wales, South Australia, Victoria

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 1:347.


Govaerts, R. et al. 2020. Acacia brachybotrya 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 26. Reference page.
International Plant Names Index. 2019. Acacia brachybotrya. Published online. Accessed: Jul 26 2019. 2019. Acacia brachybotrya. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Jul 26.
Hassler, M. Jul. Acacia brachybotrya. 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 26 {{{3}}}. Reference page.
USDA, ARS, Germplasm Resources Information Network. Acacia brachybotrya in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names
English: Grey Mulga, Grey Wattle

Acacia brachybotrya, commonly known as grey mulga or grey wattle,[3] is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to Australia.


The dense, spreading shrub with a rounded habit typically grows to a height of 1 to 3 metres (3.3 to 9.8 ft)[3] and often wider. The grey-green flat phyllodes have an obliquely oblanceolate to obovate shape with a length of 3.5 cm (1.4 in) and a width of 15 mm (0.59 in). It blooms between July and November producing axillary inflorescences composed of two to five spherical bright yellow flower-heads. After flowering long, dark brown seed pods form that are straight to slightly curved with a length of around 7 cm (2.8 in) and a width of about 6 mm (0.24 in). The dark brown to black seeds have a semi-flat ovoid shape and are around 7 mm (0.28 in) in length and a width of 4 mm (0.16 in).[4]

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 brachybotryum in 2003 by Leslie Pedley and transferred back into the genus Acacia in 2006.[5] The specific epithet is taken from the Greek words brachys meaning short and botrys meaning spike in reference to the flower supported on a short penduncle.[4]

The plant is distributed widely throughout semi-arid parts of south eastern Australia from around Yalata in the west to around Bendigo in Victoria in the east and as far north as Nymagee in New South Wales where it is found growing in many different soil types and often part of mallee communities.[3]
See also

List of Acacia species


"Acacia brachybotrya". Australian Plant Name Index, IBIS database. Centre for Plant Biodiversity Research, Australian Government.
Bentham, G. in Hooker, W.J. (1842) Notes on Mimoseae, with a synopsis of species. London Journal of Botany 1: 347.
"Acacia brachybotrya". World Wide Wattle. Western Australian Herbarium. Retrieved 5 March 2019.
"Acacia brachybotrya (Leguminosae) Grey Wattle". Seeds of South Australia. Government of South Australia. Retrieved 5 March 2019.
"Acacia brachybotrya Benth". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 5 March 2019.

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