 The seed pods that form after flowering are coiled with a length of and wide.The species was first formally described by the botanist William Vincent Fitzgerald in 1904 as part of the work "Additions to the West Australian Flora" published in the "Journal of the West Australian Natural History Society".It was reclassified as "Racosperma flabellifolium" in 2003 by Leslie Pedley, then transferred back into the genus "Acacia" in 2006.