Grevillea brachystachya is a shrub of the genus Grevillea native to Mid West and north western Wheatbelt regions of Western Australia. The moderately dense shrub typically grows to a height of 0.6 to 2 metres (2 to 7 ft) and has non-glaucous branchlets. It has simple leaves 5 to 10 centimetres (2 to 4 in) in length. An irregular inflorescence that is terminal with a raceme and green or cream flowers appears from June to November.