It is a spreading shrub with linear leaves and clusters of white to pale pink flowers.

Grevillea micrantha is a spreading shrub that typically grows to a height of 30–60 cm (12–24 in) and often forms root suckers.

Flowering occurs from August to January and the fruit is an oval follicle 10–11 mm (0.39–0.43 in) long.

[3][4] Grevillea micrantha was first formally described in 1854 by Carl Meissner in Linnaea: ein Journal für die Botanik in ihrem ganzen Umfange, oder Beiträge zur Pflanzenkunde.

[7] Small-flower grevillea grows in poor, stony soils in woodland in south-western Victoria in scattered populations in the area between the Brisbane Ranges, Wedderburn and Portland.