Acacia asepala is a shrub belonging to the genus Acacia and the subgenus Phyllodineae endemic to Western Australia.
The diffuse and multi-branched shrub typically grows to a height of 0.5to. The glabrous branchlets have minute stipules and tend to be a red-brown colour at the extremities and age to a light-grey colour. The sessile acicular phyllodes have a length of and are around .[1] It blooms from August and produces yellow flowers.
The species was first formally described by the botanist Bruce Maslin as part of the work Acacia miscellany. The taxonomy of fifty-five species of Acacia, primarily Western Australian, in section Phyllodineae (Leguminosae: Mimosoideae) as described in the journal Nuytsia. It was reclassified in 2003 as Racosperma asepalum then transferred back to the genus Acacia in 2006.[2]
It is native to an area in the Wheatbelt and Goldfields region of Western Australia. It is known from areas around Frank Hann National Park, Marvel Loch and Forrestania where it is a part of open Eucalypt woodland communities growing in sandy-loamy soils.[1]