''Acacia jensenii'' is a shrub or tree belonging to the genus ''

Acacia ''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus na ...

'' and the subgenus ''Phyllodineae'' that is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to north western

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

Description

The spindly, open shrub or tree typically grows to a height of and has one or two stems at the base. The green

phyllode Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether. Thus the phyllode comes to serve the ...

s have a linear to narrowly elliptic shape with a length of and a width of . It produces yellow flowers from May to August. After flowering it forms immature pods with a width of with oblique seeds.

Taxonomy

''Acacia jensenii'' is closely related to '' Acacia dictyophleba'' and ''

Acacia sabulosa ''Acacia sabulosa'' is a shrub of the genus ''Acacia'' and the subgenus ''Phyllodineae'' that is endemic to north western Australia. Description The bushy resinous shrub typically grows to a height of . The glabrous and spreading shrub has a "V" ...

''. It was first formally described by

Joseph Maiden Joseph Henry Maiden (25 April 1859 – 16 November 1925) was a botanist who made a major contribution to knowledge of the Australian flora, especially the genus ''Eucalyptus''. This botanist is denoted by the author abbreviation when citing ...

in 1917 as a part of

Alfred James Ewart Alfred James Ewart, FRS (12 February 1872 – 12 September 1937) was an English-Australian botanist. Early life and education Ewart was born in Toxteth Park, Liverpool, England, second son of Edmund Brown Ewart, B.A. and his wife, Martha ...

and Olive Blanche Davies's work ''Appendix IV: Acacias of the Northern Territory. The Flora of the Northern Territory''. It was reclassified as ''Racosperma jensenii'' in 2003 by

Leslie Pedley Leslie Pedley (19 May 1930 – 27 November 2018)IPNILeslie Pedley/ref> was an Australian botanist who specialised in the genus ''Acacia''. He is notable for bringing into use the generic name ''Racosperma'', creating a split in the genus, which r ...

and transferred back into genus ''Acacia'' in 2006. The only other synonym is ''Acacia jenseni''.

Distribution

It has a scattered distribution in the Kimberley,

Pilbara The Pilbara () is a large, dry, thinly populated region in the north of Western Australia. It is known for its Aboriginal peoples; its ancient landscapes; the red earth; and its vast mineral deposits, in particular iron ore. It is also a glo ...

and Goldfields-Esperance regions of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

where it is found on plains and sand dunes growing in red sandy soils and in

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) ...

gullies. It is also found in the

Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory ...

in the

Tanami Desert The Tanami Desert is a desert in northern Australia, situated in the Northern Territory and Western Australia. It has a rocky terrain with small hills, and cacti. The Tanami was the Northern Territory's final frontier and was not fully explored b ...

where it is situated on the slopes and crests of sand dunes.

References

{{Taxonbar, from=Q9565735 jensenii Acacias of Western Australia Flora of the Northern Territory Plants described in 1917 Taxa named by Joseph Maiden

Description

Taxonomy

Distribution

See also

References