Grevillea viridiflava is an erect, spindly shrub that typically grows to a height of 0.5–1 m (1 ft 8 in – 3 ft 3 in), and often forms a rhizome. Its leaves are linear to narrowly elliptic, mostly 30–60 mm (1.2–2.4 in) long and 2–3 mm (0.079–0.118 in) wide. The edges of the leaves are rolled under, the upper surface is glabrous and the lower surface silky-hairy. The flowers are arranged in clusters of 12 to 24 on the ends of branches, and are greenish or yellowish in the bud stage, later white with a yellowish green or cream-coloured style, the pistil 7–9.5 mm (0.28–0.37 in) long. Flowering occurs from August to January and the fruit is a lumpy follicle 9–11 mm (0.35–0.43 in) long.^[2][3]

Grevillea viridiflava was first formally described in 2000 by Robert Makinson in the Flora of Australia from specimens collected near Torrington in 1988.^[4]

Linear-leaf grevillea in the shrubby understorey of forest in moist places at altitudes of 850–1,000 m (2,790–3,280 ft) in montane areas of south-eastern Queensland and north-eastern New South Wales.^[2][3]