''Acacia oncinocarpa'' is a shrub or tree belonging to the genus '' Acacia'' and the subgenus ''Juliflorae'' 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 else ...

to northern Australia.

Description

The shrub or tree typically grows to a height of and has a rounded and resinous habit but can have a prostrate habit in exposed coastal locales. The smooth or flaky bark can be grey to brown in colour and it has angular branchlets with reddish brown granules. Like most species of ''Acacia'' it has phyllodes rather than true leaves. The evergreen phyllodes have a narrowly elliptic to narrowly oblanceolate shape and can be straight or curved The hoary or glabrous, chartaceous to subcoriaceous phyllodes have a length of and a width of . The phyllodes have three to five prominent longitudinal nerves. It blooms between March and August producing cylindrical flower-spikes in groups of up to five in the axils. The flower-spikes have a length of that are loosely packed with pale yellow to cream-coloured flowers. Following flowering woody and glabrous

seed pod This page provides a glossary of plant morphology. Botanists and other biologists who study plant morphology use a number of different terms to classify and identify plant organs and parts that can be observed using no more than a handheld magnify ...

s form that have a narrowly oblanceolate to linear shape and are basally narrowed. The erect, flat and straight-sided seed pods have a length of and a width of The brown seeds are arranged obliquely in the pods. The oblong-elliptic shaped seeds have a length of with a narrowly conical aril.

Distribution

It is native to a small area in the Kimberley region 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 ...

and across tropical areas of the

top end The Top End of Australia's Northern Territory is a geographical region encompassing the northernmost section of the Northern Territory, which aside from the Cape York Peninsula is the northernmost part of the Australian continent. It covers a ra ...

of the

Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Aust ...

where it is quite common throughout Arnhem Land. It is often situated on coastal sand dunes or cliff area where it is found growing loamy or sandy and often gravelly soils on or around

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 ...

granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies under ...

or laterite as a part of ''

Eucalyptus ''Eucalyptus'' () is a genus of over seven hundred species of flowering trees, shrubs or mallees in the myrtle family, Myrtaceae. Along with several other genera in the tribe Eucalypteae, including '' Corymbia'', they are commonly known as e ...

'' or '' Melaleuca'' woodland or shrubland communities.

References

{{Taxonbar, from=Q15288170 oncinocarpa Acacias of Western Australia Plants described in 1842 Taxa named by George Bentham

Description

Distribution

See also

References