Grevillea prasina is a spreading or straggly shrub that typically grows to a height of 1–4.5 m (3 ft 3 in – 14 ft 9 in). Its leaves are egg-shaped or elliptic in outline, 60–80 mm (2.4–3.1 in) long and 20–50 mm (0.79–1.97 in) wide with 5 to 11 evenly-spaced teeth on the edges, both surfaces more or less glabrous and bright yellowish-green. The flowers are arranged on the ends of branches or in leaf axils in dense, sometimes branched clusters, each cluster oval to short-cylindrical on a rachis 10–30 mm (0.39–1.18 in) long. The flowers are fragrant, cream-coloured at first, later pale yellow and the style is green to white with a green tip, the pistil 18.5–22 mm (0.73–0.87 in) long. Flowering occurs from March to October and the fruit is glabrous, elliptic follicle 8.5–16 mm (0.33–0.63 in) long.^[2][3]

Grevillea prasina was first formally described in 1986 by Donald McGillivray in his book New Names in Grevillea (Proteaceae) from specimens collected by Rayden Alfred Perryon "39 mi (63 km) W/N.W. of Wave Hill Police Station" in 1949.^[4] The specific epithet (prasina) means "leek green".^[5]

This grevillea grows in open woodland or shrubland between the Pentecost River in the Kimberley region of Western Australia to Port Keats in the Northern Territory, with a few scattered populations as far east as the Gulf of Carpentaria.^[2][3][6]

• List of Grevillea species