Acacia filamentosa

Acacia filamentosa is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is endemic to north western Australia.

Description
The shrub is typically grows to a height of 0.9 to 2 m. It has glabrous and resinous branchlets. Like most species of Acacia it has phyllodes rather than true leaves. The evergreen and ascending phyllodes have a coarsely filiform shape are curved to shallowly sinuous with a length of 15 to 25 cm and a diameter of around 1 mm with eight distant, obscure and resinous veins. It blooms from June to September producing yellow flowers. It has simple inflorescences that occur in pairs in the axils, the cylindrical flower-spikes have a length of 20 to 25 mm and a diameter of around 6 mm and are densely flowered. The crustaceous to thin-coriaceous seed pods that form after flowering have a linear shape and are slightly raised over and constricted between the seeds. The pods have a length of up to around 11 cm and a width of around 3 mm and are longitudinally striated and glabrous. The brown seeds have a yellow coloured peripheral band and are arranged longitudinally within the pods. The seeds have a narrowly oblong shape with a length of 6 to 7 mm and a pale yellowish aril.

Distribution
It is native to an area in the Kimberley region of Western Australia around 150 to 300 km south west of Wyndham where it has a scattered distribution across a few areas including Adcock Gorge between Pentecost Downs Station and Kalumburu and is commonly situated on sandstone hills.