Acacia longiphyllodinea, commonly known as yalgoo[1] or long-leaved wattle, is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is endemic to parts of western Australia
The shrub is typically growing to a height of 1to. It has an open and wiry habit wit numerous glabrous stems. More mature specimens have dark grey bark that is fissured at the base. The brown branchlets are covered in white powdery substance and are slightly flattened towards the apices. The linear, green and rigidly erect phyllodes are in length and in diameter.[1] It flowers from July to September producing yellow flowers. The cylindrical flower-spikes occur singly or in pairs in the axils 1 or 2 in axils and are in length and and are densely packed with golden coloured flowers. The straight to slightly curved light brown seed pods that form after flowering have a linear shape and are straight-sided or slightly constricted between each of the seeds with a length of and are wide. The dark brown oblong seeds inside are arranged longitudinally and are in length.[1]
It is native to the Mid West and Wheatbelt regions of Western Australia where it is found on undulating plains and among granite outcrops growing in sandy or loamy gravel soils. It occupies an area from around Geraldton in the north to Yalgoo in the east and south to around Bencubbin and is usually associated with low Eucalyptus woodland communities.[1]