''Acacia resinimarginea'', also known as old-man wodjil, 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 ''Juliflorae'' that is endemic to 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 tree or shrub typically grows to a height of with an erect habit and with straight trunks. It has glabrous and terete branchlets and resinous ribs when still immature. 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 rather than true leaves. The ascending to erect phyllodes have a linear shape and are quite straight and have a mostly rhombic cross-section with a length of and a width of . The glabrous phyllodes have a slightly recurved tapered point and resinous nerve at the apex of each of the four angles. It blooms from August to October producing yellow flowers. The simple inflorescences are found on stalks that are in length. The obloid to short-cylindrical flower-heads are in length and packed with golden flowers. The glabrous and chartaceous seed pods that form after flowering have a straight shape and are constricted between and raised over each of the seeds and have a length of up to and a wisth of around . The mottled brown seeds inside are arranged longitudinally. The seeds have an elliptic-oblong shape with a length of with a crested apical

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

Acacia resinimarginea is native to a large area in the

Mid West The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of the United States. I ...

and Wheatbelt region of Western Australia where it is often situated on undulating plains growing mostly in sandy but sometimes in loamy soils, often as pure stands. It is found from around Perenjori in the west to around

Kambalda Kambalda is a small mining town about from the mining city of Kalgoorlie in Western Australia, within the Goldfields. It is split into two townsites apart, Kambalda East and Kambalda West; and is located on the western edge of a giant salt ...

in the south east and up to around Leonora in the north.

References

{{Taxonbar, from=Q15288585 resinimarginea Acacias of Western Australia Taxa named by William Vincent Fitzgerald Plants described in 1904

Description

Distribution

See also

References