''Acacia sulcaticaulis'', also commonly known as the Mount Mulgine fluted wattle, 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 ''Juliflorae'' that is native to a small area in 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 shrub is usually multistemmed with an obconic habit and typically grows to a height of shrub or it rarely is seen as a tree up to around in height. It has longitudinally fluted branches and stems with smooth bark and glabrous and resinous new shoots. The glabrous branchlets become flattened toward the terminus of the branches and are flattened and obscurely ribbed. Like most species of ''Acacia'' it has

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 instead of true leaves. The green phyllodes have a narrowly elliptic shape and are often straight with a length of and a width of with numerous fine longitudinal nerves that are close together. The simple inflorescences occur singly or in pairs in the

axil A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...

s. The flower-heads have an obloid heads with a length of and a diameter of . The straight, thinly crustaceous to coriaceous seed pods that form after flowering are a red to brown colour with a length of and a width of . The brown coloured seeds within the pods are arranged longitudinally and have an oblong shape with a length of and a have a white

aril An aril (pronounced ), also called an arillus, is a specialized outgrowth from a seed that partly or completely covers the seed. An arillode or false aril is sometimes distinguished: whereas an aril grows from the attachment point of the see ...

Distribution

It is native to a small area in the Wheatbelt region of Western Australia around Perenjori in the Mount Mulgine area. It is often found on ridges, steep slopes and along rocky creek lines in gravelly sandy soils over quartz substrates as a part of shrubland commonunites where it is often associated with '' Acacia burkittii'' and ''

Allocasuarina acutivalvis ''Allocasuarina acutivalvis'' is a shrub or tree of the genus ''Allocasuarina'' native to the Wheatbelt, Goldfields-Esperance and Mid West regions of Western Australia. The dioecious shrub or tree typically grows to a height of . It produces b ...

''.

References

{{Taxonbar, from=Q17438908 sulcaticaulis Acacias of Western Australia Taxa named by Bruce Maslin Plants described in 2008

Description

Distribution

See also

References