The evergreen phyllodes are continuous with branchlets and form opposite wings with each one extending to the next below.

[2] The species was first formally described by the botanist Bruce Maslin in 1995 as part of the work Acacia Miscellany Taxonomy of some Western Australian phyllocladinous and aphyllodinous taxa (Leguminosae: Mimosoideae) as published in the journal Nuytsia.

The species as reclassified as Racosperma bifarium in 2003 by Leslie Pedley but returned to the genus Acacia in 2006.

[3] A. bifaria is found among mallee and woodland communities[2] but has a limited range inland along the south coast of Western Australia in the area around Jerramungup and Ravensthorpe.

It is often found in clay, rocky loam or sandy soils on undulating plains, low-lying areas and on roadsides.