Acacia microcybe is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of north eastern Australia where it is listed as being of Least Concern according to the Nature Conservation Act 1992.[1]
The tree typically grows to a height of and has finely fissured, dark grey coloured bark with sparsely to moderately hairy branchlets that usually have a scaly or leprous appearance. Like most species of Acacia it has phyllodes rather than true leaves. The sparsely to moderately hairy and evergreen phyllodes have a linear shape and are straight to slightly curved with a length of and a width of with many parallel indistinct nerves.[2]
The species was first formally described by the botanist Leslie Pedley in 1978 as Acacia microcephala and then reclassified as Racosperma microcephalum in 1987. It was classified under the current name by Pedley in 2006 as a part of the work Notes on Acacia Mill. (Leguminosae: Mimosoideae), chiefly from Queensland as published in the journal Austrobaileya.[3]
The plant has a limited distribution in North West Queensland to the north and north west of Aramac growing in alkaline, hard, stony, clay soils.[2]