Pimelea treyvaudii is a small shrub high with smooth stems glabrous. Leaves are arranged opposite, narrowly elliptic long, wide, smooth, uniformly grey coloured, sometimes paler on the underside. The
inflorescence consists of numerous flowers in a spherical shaped head. The 9-11 overlapping flower
bracts are
sessile, narrowly egg-shaped, narrower than nearby leaves, long, wide, smooth on the outside, hairy on inside, cream at the base, green toward the apex, sometimes a purplish colour. The bisexual white flowers are a floral tube, long, smooth inside, with long upward hairs above. The
sepals spreading, long and smooth on the inside. The
pedicel is hairy and the
stamens may be longer or shorter than the sepals. The fruit are a dry nut thickly covered with fine hairs and forming into a densely clustered conical head. Flowering occurs from May to February. ==Taxonomy and naming==