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Acacia validinervia foliage

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 validinervia

Acacia validinervia Maiden & Blakely

Acacia notabilis var. validinervia (Maiden & Blakely) J.M.Black (1952) [Homotypic synonym]
Racosperma validinervium (Maiden & Blakely) Pedley (1986) [Homotypic synonym]

Native distribution areas:
Acacia validinervia

Continental: Australasia
Regional: Australia
Northern Territory, South Australia, Western Australia

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

Maiden, J.H. & Blakely, W.F., 1927. J. Roy. Soc. Western Australia xiii. 15.


Govaerts, R. et al. 2020. Acacia validinervia in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Aug 17. Reference page.
International Plant Names Index. 2019. Acacia validinervia. Published online. Accessed: Aug 17 2019. 2019. Acacia validinervia. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Aug 17.
Catalogue of Life: 2020 Annual Checklist
Acacia validinervia – Taxon details on World Wide Wattle.

Vernacular names
English: Alumaru, Nyala Nyala, Nyalanyalara

Acacia validinervia also commonly known as nyalanyalara, nyala nyala, alumaru or blue wattle,[1] is a shrub of the genus Acacia and the subgenus Phyllodineae endemic to arid areas of inland Australia.


The erect slender shrub typically grows to a height of 1 to 4 metres (3 to 13 ft).[2] It can have a straggly or spindly habit with multiple stems. The glabrous branchlets and branches are covered in a fine, white powdery coating. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen phyllodes have an elliptic to oblanceolate shape that can be slightly recurved. Each phyllode is 6 to 13 centimetres (2 to 5 in) in length and 15 to 55 millimetres (0.59 to 2.17 in) wide with a thick leathery texture and have a prominent midrib and marginal nerves.[1] It blooms from July to August and produces yellow flowers.[2] The spherical inflorescences flower-heads have a diameter of 5 to 6 mm (0.20 to 0.24 in) containing 50 to 80 densely packed golden flowers. The firmly chartaceous to thinly coriaceous seed pods that form after flowering have a narrowly oblong shape and are straight to slightly curved with a length of up to 12 cm (4.7 in) and a width of 7 to 8 mm (0.28 to 0.31 in). The seeds inside are arranged longitudinally to slightly obliquely and have an oblong to elliptic shape with a length of 5 to 8 mm (0.20 to 0.31 in) and a width of 3 to 5 mm (0.12 to 0.20 in).[1]

It is native to an area in the desert in the Central Ranges of the eastern Goldfields region of Western Australia growing in red sand, stony sand, loamy or clay soils.[2] The shrub is also found in north western South Australia and southern parts of the Northern Territory. The range of the species extends from as far west as Warburton in the Blackstone and Cavenagh and Blackstone Ranges to the north western margins of the Simpson Desert in the Northern Territory in the north down to around the Musgrave and Tomkinson Ranges of South Australia where it is situated along dry creeks and river beds.[1]
See also

List of Acacia species


"Acacia validinervia Maiden & Blakely". Wattle Acacias of Australia. Lucid Central. Retrieved 8 October 2018.
"Acacia validinervia". FloraBase. Western Australian Government Department of Parks and Wildlife.

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