Acacia papulosa

Acacia papulosa is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area along the south coast of south western Australia.

Description
The bushy shrub typically grows to a height of 0.25 to 2 m and has a dense habit with resinous and glabrous branchlets with small pimple-like projections. Like most species of Acacia it has phyllodes rather than true leaves. The glabrous, ascending to erect and evergreen phyllodes are straight to shallowly incurved and cylindrical with a length of 2 to 6 cm and a diameter of 0.7 to 1 mm and have eight nerves. It blooms from August to September and produces yellow flowers. The simple inflorescences occur in pairs in the axils and have spherical to slightly obloid flower-heads that have a length of 2.5 to 3.5 mm and a diameter of 2.5 to 3 mm containing 10 to 20 flowers. Following flowering thinly leathery, glabrous, erect and linear seed pods form that are raised over each of the seeds constricted between them with a length of around 4 cm and a width of 2.5 mm. The pods contain glossy black to dark brown oblong shaped seeds with a length of 3 to 4 mm.

Distribution
It is native to three small areas along the southern coast in the Great Southern and Goldfields-Esperance regions of Western Australia where it is found growing in areas of spongolitic loam. The shrub has a limited distribution in the Boxwood Hill area and in the Fitzgerald River National Park area as a part of woodland communities.