Acacia hamersleyensis

Life-forms

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 hamersleyensis
Name

Acacia hamersleyensis Maslin, 1982
Synonyms

Racosperma hamersleyense (Maslin) Pedley

Distribution
Native distribution areas:
Acacia hamersleyensis

Continental: Australasia
Regional: Australia
Western Australia

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

Maslin, B.R., 1982. Nuytsia; Bulletin of the Western Australian Herbarium. South Perth, W.A. 4:90.

Links

Govaerts, R. et al. 2020. Acacia hamersleyensis in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 04. Reference page.
International Plant Names Index. 2019. Acacia hamersleyensis. Published online. Accessed: Aug 04 2019.
Tropicos.org 2019. Acacia hamersleyensis. Missouri Botanical Garden. Published online. Accessed: 04 Aug 2019.
Hassler, M. Aug. Acacia hamersleyensis. 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 04 {{{3}}}. Reference page.
USDA, ARS, Germplasm Resources Information Network. Acacia hamersleyensis in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names

Acacia hamersleyensis, also known as Karijini wattle or Hamersley Range wattle,[1] is a tree or shrub belonging to the genus Acacia and the subgenus Juliflorae. It is endemic to a small area in central Western Australia.

Description

The spindly spreading tree or shrub typically grows to a height of 1.5 to 5 metres (5 to 16 ft).[2] It can be spreading, bushy or openly branched or have a rounded or obconic habit with up to six main stems emerging from ground level. Older specimens can appear gnarled with a spreading sparse canopy. The dark brown to grey or black coloured bark can be smooth on higher branches but longitudinally fissured and fibrous on the main stems especially toward the base. The glabrous branchlets have a yellowish to light brown colour sometimes with a pale powdery coating that is a more orange colour at the extremities. Like most species of Acacia it has phyllodes rather than true leaves. The glabrous narrowly elliptic phyllodes are slightly asymmetric with a length of 8 to 14 cm (3.1 to 5.5 in) and a width of 7 to 17 mm (0.28 to 0.67 in) and are straight to slightly falcate with many parallel longitudinal nerves.[1] It blooms from July to September producing yellow flowers.[2] The simple inflorescences form showy and fragrant cylindrical flower-spikes with a length of 3 to 6.5 cm (1.2 to 2.6 in) and a diameter of 6 to 8 mm (0.24 to 0.31 in) with densley packed bright golden flowers. The light brown, firmly chartaceous and slightly undulate seed pods that form after flowering have a narrowly oblong shape and are 2.5 to 8.5 cm (0.98 to 3.35 in) in length and 5 to 8 mm (0.20 to 0.31 in) wide and are straight to irregularly shallowly curved with silvery to light golden spreading hairs. The slightly glossy grey-brown seeds are arranged obliquely in the pods. The seeds have an obloid to ellipsoidal shape and a length of 4 to 4.5 mm (0.16 to 0.18 in) and a width of 2.5 to 3 mm (0.098 to 0.118 in) with an areole enclosed in dull yellow tissue and a cream colured aril.[1]
Distribution

It is native to an area in the Pilbara region of Western Australia[2] mostly in the Hamersley Range around Newman in the east extending through Wittenoom and Paraburdoo in the west with small outlier populations in the Carnarvon Range in the Little Sandy Desert. It is usually situated along ridges and on the higher slopes of ranges, in rocky gullies and on scree slopes and occasionally in the creeklines that flow down from the ranges. It will grow in iron-rich skeletal soils over ironstone bed rock.
See also

List of Acacia species

References

"Acacia hamersleyensis". Wattles of the Pilbara. Department of Environment and Conservation. 2010. Retrieved 27 October 2019.
"Acacia hamersleyensis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.