Grevillea pteridifolia is a shrub or tree that typically grows to a height of , or rarely a prostrate shrub. Its leaves are long and usually pinnatisect with 13 to 29 linear or very narrowly egg-shaped lobes long and wide. The edges of the leaves are rolled under, the exposed parts of the lower surface covered with silky hairs. The flowers are arranged in clusters on one side of a
rachis long, the flowers at the base of the cluster opening first. The flowers are greyish-green to silvery on the outside, the inside and the
style bright orange-yellow or reddish, the
pistil long. Flowering occurs in most months with a peak from May to September and the fruit is a shaggy-hairy
follicle long. Plants from Queensland are non-
lignotuberous shrubs to small trees with smooth bark and lighter inflorescences than other forms. A prostrate form which spreads up to across is found on exposed areas near Cooktown in north Queensland. Plants from Western Australia and the Northern Territory grow as a rough-barked lignotuberous shrub to small tree. A population of this last form from Kakadu National Park has all-silvery leaves. ==Taxonomy==