Grevillea maccutcheonii is a dense, spreading shrub that grows to around 2 metres high. Its distinctive leaves are up to 30 mm in diameter, with three lobes and a burgundy tinge on the new growth. The conspicuous spider-like flower clusters are terminal, appearing at the ends of branches. The flowers are reddish-green and can appear in most months, with peak flowering occurring from winter through spring, particularly between July and November.
Grevillea maccutcheonii is known from a single location near Busselton in the South West region of Western Australia. The species is listed as endangered in the wild and survives as only a very small population of mature plants.
Despite its rarity, it is well suited to gardens in south-eastern Australia, particularly in regions with wet winters and hot, dry summers. It grows best in moist, well-drained soils in full sun to part shade.