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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 signata

Acacia signata F.Muell.

Fragm. 4:7. 1863
USDA, ARS, Germplasm Resources Information Network. Acacia signata in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Acacia signata is a tree or shrub belonging to the genus Acacia and the subgenus Juliflorae that is endemic to western Australia.


The slender, straggly, weeping tree or shrub typically grows to a height of 1 to 4 metres (3 to 13 ft).[1] The pendulous or arching branchlets are often covered in a fine white powder. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen phyllodes usually have a pendulous forn with a linear to linear-elliptic shape and are straight to slightly curved. The grey-green and coriaceous phyllodes have a length of 10 to 20 cm (3.9 to 7.9 in) and a width of 4 to 10 mm (0.16 to 0.39 in) and have numerous fine nerves numerous and a prominent yellow coloured pulvinus.[2] It blooms from August to October producing yellow flowers.[1] The inflorescences occur in groups of one to four flower-spikes with a cylindrical shape. The spikes have a length of 12 to 23 mm (0.47 to 0.91 in) and a diameter of 6 to 7.5 mm (0.24 to 0.30 in). The coriaceous seed pods that form after flowering have a curved to linear shape and are raised over seeds. The pods have a length of up to 7 cm (2.8 in) and have a width of 5 to 6 mm (0.20 to 0.24 in) and are glabrous with a powdery white coating. The glossy dark brown seeds inside are arranged longitudinally and have a compressed subdiscoid shape with a length of 4 to 4.5 mm (0.16 to 0.18 in).[2]

The species was first formally described in 1863 by the botanist Ferdinand von Mueller as published in the work Fragmenta Phytographiae Australiae.[1]

It is native to an area in the Mid West and north western Wheatbelt region of Western Australia where it is often situated on sandplains growing in sandy soils[1] as a part of in heath, scrub and shrubland communities. It is found around Hamelin Pool in the north to around Cockleshell Gully in the south and as far east as Wubin but is not commonly occurring.[2]
See also

List of Acacia species


"Acacia signata". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia signata F.Muell". Wattle - Acacias of Australia. Lucid Central. Retrieved 1 February 2020.

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