Grevillea makinsonii is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is an erect shrub with egg-shaped to more or less spatula-shaped leaves, and clusters of cream-coloured to pale yellow flowers.
Grevillea makinsonii is an erect shrub that typically grows to a height of high. The leaves are egg-shaped with the narrower end towards the base to more or less spatula-shaped, long and wide. The flowers are arranged in conical clusters long and are glabrous and cream-coloured to pale yellow, the pistil long. Flowering occurs from July to October, and the fruit is a wrinkled, oval follicle about long.[1]
Grevillea makinsonii was first formally described in 1986 by Donald McGillivray in his book New Names in Grevillea (Proteaceae) from specimens collected near Arrino in 1969.[2] The specific epithet (makinsonii) honours Robert Owen Makinson.[3]
This grevillea grows in heath on sandplains in the area around Arrino, Three Springs and Eneabba in the Avon Wheatbelt, Geraldton Sandplains bioregions of south-western Western Australia.
Grevillea makinsonii is listed as "Priority Three" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, meaning that it is poorly known and known from only a few locations but is not under imminent threat.[4]