Mirbelia ramulosa is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia.

It is an erect, much-branched, spiny, leafless shrub with yellow and red, purple or brown flowers.

Its flowers are arranged in racemes near the ends of branches and are yellow and red, purple or brown, the sepals about 4 mm (0.16 in) long and joined at the base, the lobes much shorter than the tube, the two upper lobes joined for most of their length.

[2][3][4] This species was first formally described in 1839 by John Lindley, who gave it the name Daviesia ramulosa in A Sketch of the Vegetation of the Swan River Colony.

[5][6] In 1930, Charles Gardner changed the name to Mirbelia ramulosa in Enumeratio Plantarum Australiae Occidentalis.