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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 nigripilosa
Subspecies: A. nigripilosa subsp. latifolia - A. nigripilosa subsp. nigripilosa

Acacia nigripilosa Maiden, 1919

Racosperma nigripilosum (Maiden) Pedley

Native distribution areas:
Acacia nigripilosa

Continental: Australasia
Regional: Australia
Western Australia

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

Maiden, J.H. , 1919. Journal and proceedings of the Royal Society of New South Wales 53: 172.


Govaerts, R. et al. 2020. Acacia nigripilosa in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 10. Reference page.
International Plant Names Index. 2019. Acacia nigripilosa. Published online. Accessed: Aug 10 2019. 2019. Acacia nigripilosa. Missouri Botanical Garden. Published online. Accessed: 10 Aug 2019.
Catalogue of Life: 2021 Annual Checklist
Acacia nigripilosa – Taxon details on World Wide Wattle.

Vernacular names

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


The shrub typically grows to a height of 0.5 to 2 metres (1.6 to 6.6 ft).[1] It has glabrous ash-grey, coloured branchlets. the ascending to erect dull to shiny green phyllodes have a linear to narrowly oblong-elliptic or oblanceolate shape. The phyllodes have a length of 2 to 7 cm (0.79 to 2.76 in) and a width of 1 to 8 mm (0.039 to 0.315 in) and are narrowed at the base.[2] It blooms from July to September and produces yellow flowers.[1] The inflorescences occur singly or in pairs along an axes of 1 to 3 mm (0.039 to 0.118 in). The flower-heads have a slightly obloid shape and contain 18 to 34 golden flowers. The seed pods that form after flowering resemble a string of beads and have a length of 4 to 9 cm (1.6 to 3.5 in) and a width of 4 to 7 mm (0.16 to 0.28 in). the shiny dark brown seeds within the pods have an oblong-elliptic to ovate shape and a length of around 4 mm (0.16 in).[2]

The species was first formally described by the botanist Joseph Maiden in 1920 as part of the work Notes on Acacias, No. IV, with descriptions of new species as published in the Journal and Proceedings of the Royal Society of New South Wales. It was reclassified in 2003 as Racosperma nigripilosum by Leslie Pedley then transferred back to the genus Acacia in 2006. The only other synonym for this species is Acacia nigripilosus.[3] There are two recognized subspecies:

Acacia nigripilosa subsp. latifolia
Acacia nigripilosa subsp. nigripilosa


It is native to an area in the Mid West, Goldfields and Wheatbelt regions of Western Australia where it grows in sandy soils around laterite.[1] It is found as far north as around Yuna south to around Goomalling and east out to Mount Holland where it is found in scrubland or open woodland communities.[2]
See also

List of Acacia species


"Acacia nigripilosa". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia nigripilosa". World Wide Wattle. Western Australian Herbarium. Retrieved 15 May 2019.
"Acacia nigripilosa Maiden". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 15 May 2019.

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