Grevillea armigera, also known as prickly toothbrushes, is an erect shrub or tree which is endemic to the south-west of Western Australia. The species was formally described by Swiss botanist Carl Meissner in 1856. It is a prickly-leafed shrub which grows to a height of between 1 and 3.6 metres. Its flowers mostly appear from early winter to late summer (June to February in Australia). These are grey, green, or pale yellow (occasionally flushed pink) with contrasting black to blackish maroon styles.