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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 microcalyx

Acacia microcalyx Maslin, 1974

Racosperma microcalyx (Maslin) Pedley (2003)

Native distribution areas:
Primary references

Maslin, B.R., 1974, Nuytsia, Bulletin of the Western Australian Herbarium 1(4): 323.


Govaerts, R. et al. 2020. Acacia microcalyx in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 08. Reference page.
International Plant Names Index. 2019. Acacia microcalyx. Published online. Accessed: Aug 08 2019. 2019. Acacia microcalyx. Missouri Botanical Garden. Published online. Accessed: 08 Aug 2019.
Hassler, M. 2020. Acacia microcalyx. 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. 2020. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: 2020 Aug 08. Reference page.
Acacia microcalyx – Taxon details on World Wide Wattle.

Acacia microcalyx is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to western Australia.


The dense pungent shrub typically grows to a height of 1.5 to 3 metres (5 to 10 ft).[1] It has ash-grey to pale green coloured, rigid, erect to ascending branchlets that are generally straight and are sparingly divided with obscure ribs. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen phyllodes are few and distant from each other with a linear shape and a length of 2 to 4 cm (0.79 to 1.57 in) and a width of 1 to 2 mm (0.039 to 0.079 in) and an obscure midrib.[2] It blooms from February to June and produces cream flowers.[1]

It is native to an area in the Mid West and Goldfields-Esperance regions of Western Australia where it is commonly situated on floodplains and stony plains growing in sandy, loamy and clay loam soils.[1] The bulk of the population is found around Shark Bay but the range extends to the east as far as Mount Magnet in the north east and Belele Station in the south east where it is commonly found as a part of Acacia scrubland communities or with species of Atriplex or Halosarcia.[2]
See also

List of Acacia species


"Acacia microcalyx". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia microcalyx Maslin". Wattle - Acacias of Australia. Lucid Central. Retrieved 9 July 2020.

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