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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 leptostachya

Acacia leptostachya Benth., 1864

Acacia argentea Maiden
Acacia capillosa Pedley
Racosperma leptostachyum (Benth.) Pedley

Native distribution areas:
Acacia leptostachya

Continental: Australasia
Regional: Australia

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

Bentham, G., 1864. Flora Australiensis 2: 406.


Govaerts, R. et al. 2020. Acacia leptostachya in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 07. Reference page.
International Plant Names Index. 2019. Acacia leptostachya. Published online. Accessed: Aug 07 2019. 2019. Acacia leptostachya. Missouri Botanical Garden. Published online. Accessed: 07 Aug 2019.
Hassler, M. Aug. Acacia leptostachya. 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. Aug. Species 2000 & ITIS Catalogue of Life. Published online. Accessed: Aug 07 {{{3}}}. Reference page.

Vernacular names
English: Slender Wattle, Townsville Wattle

Acacia leptostachya, commonly known as Townsville wattle[2] or slender wattle,[3] is a shrub or small tree belonging to the genus Acacia and the subgenus Juliflorae that is native to north eastern Australia.


The shrub or tree typically grows to a maximum height of 0.5 to 6 m (1 ft 8 in to 19 ft 8 in). It has hairy ribbed branchlets with resinous young shoots. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen phyllodes have silvery coloured hairs and a narrowly elliptic to lanceolate shape that can be straight or shallowly curved. The phyllodes have a length of 4 to 9 cm (1.6 to 3.5 in) and a width of 2 to 12 mm (0.079 to 0.472 in) and contain many fine, rather closely packed veins, with two or three that are more prominent.[2] The simple inflorescences occur in pairs on racemes. The cylindrical flower-spikes have a length of 2 to 4 cm (0.79 to 1.57 in) and is sub-densely packed with golden flowers. Following flowering firmly chartaceous to thinly coriaceous and glabrous seed pods form. the pods have a linear shape and are raised over the seeds and a have a length up to around 6 cm (2.4 in) and a width of 2 to 9 mm (0.079 to 0.354 in). The shiny brown seeds have an oblong shape with a length of 2.7 to 4 mm (0.11 to 0.16 in) with a small aril.[2]

Th species was first formally described by the botanist George Bentham in 1864 as part of the work Flora Australiensis, it was reclassified as Racosperma leptostachyum by Leslie Pedley in 1987 then transferred back to genus Acacia in 2001. Other synonyms include Acacia capillosa and Acacia argentea and is commonly confused with Acacia conspersa.[4] The specific epithet is derived from the Greek words lepto meaning slender and stachys meaning ear of corn in reference to the shape of the flower spikes.[5]

It is endemic to central-eastern parts of Cape York Peninsula from around Coen in the north extending through coastal and inland areas to around Maryborough and south of Charleville in the south. It is found in a variety of habitat growing in deep sandy or skeletal soils overlaying granite or sandstone bedrock as a part of Eucalyptus woodland communities or Triodia grasslands.[2]

The shrub or tree grows well a full sun position in dry well drained soils. It can be propagated from seed after seeds are scarified or treated with boiling water.[5]
See also

List of Acacia species


"DOI Details". doi:10.26197/5c0b1388984eb. Retrieved 8 December 2018.
"Acacia leptostachya". WorldWideWattle. Western Australian Herbarium. Retrieved 8 November 2019.
"Acacia leptostachya". Wattle - Acacias of Australia. Lucid Central. Retrieved 8 November 2019.
"Acacia leptostachya Benth. Slender Wattle". World Wide Wattle. Global Biodiversity Information Facility. Retrieved 8 November 2019.
"Acacia leptostachya". Australian Native Plants Society. August 2010. Retrieved 8 November 2019.

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