''Acacia pachyacra'' is a tree or shrub 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 to arid parts of central and 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 bushy slender tree or shrub typically grows to a height of . It branches near or atnnear ground level into a few erect to ascending main stems. It has a soft, dense canopy that produces a hissing sound in windy conditions much the same as a Sheoak ('' Casuarina'' or '' Allocasuarina'') or Athol Pine ('' Tamarix'') would. It has smooth greenish bronze or reddish brown coloured bark that is often covered in a fine white powdery coating that is grey and roughened near the base of the trunks. It blooms from August to October and produces yellow flowers.

Taxonomy

The species was first formally described by the botanists Joseph Maiden and William Blakely in 1927 as part of the work '' Descriptions of fifty new species and six varieties of western and northern Australian Acacias, and notes on four other species'' as published in the ''Journal of the Royal Society of Western Australia''. It was reclassified as ''Racosperma pachyacrum'' by Leslie Pedley in 2003 then returned to genus ''Acacia'' in 2006. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

is taken from Greek words ''pachys'' meaning ''thick'' and ''akron'' meaning ''top'' in reference to the thicken mucro at the end of the phyllodes.

Distribution

It is native to an area in the Pilbara and Goldfields regions of Western Australia. Its range extends from coastal areas of the western Pilbara to around the Docker River then further east into the Northern Territory and to far north western South Australia. In Western Australia it is mostly located in the Hamersley and

Ophthalmia Range The Ophthalmia Range is a Mountain range, range in the Pilbara region of Western Australia. It is approximately north of Perth, Western Australia, Perth; the nearest town is Newman, Western Australia, Newman, approximately to the south in the ...

s where it is commonly situated on dunes or plains growing in sandy soils but also will grow in rocky red loamy soils with a pebble and along ridges of banded ironstone often in spinifex communities and can form forms dense thickets in alluvial washes.

References

{{Taxonbar, from=Q15288055 pachyacra Acacias of Western Australia Taxa named by Joseph Maiden Taxa named by William Blakely Plants described in 1927

Description

Taxonomy

Distribution

See also

References