 The species was first formally described by Fitzgerald in 1904 as part of the work "Additions to the West Australian Flora" as published in the "Journal of the West Australian Natural History Society".It was reclassified in 1987 by Leslie Pedley as "Racosperma ramulosum" and then transferred back to the genus "Acacia" in 2001.The species name is taken from the Latin word "ramulosus" meaning "many branchlets" in reference the habit of the shrub.