Pimelea ammocharis is a small, upright shrub high with new growth stems densely hairy. The leaves are arranged alternately, with a short leaf stalk, narrowly elliptic to egg-shaped or linear, long, wide and light silvery green throughout. The inflorescence may be either pendulous or upright, usually in a tight head of numerous tubular white to deep yellow to orange flowers long. The flowers are smooth on the inside and thickly hairy on the outside and the sepals long. The male flowers are mostly evenly hairy or hairs slightly longer near the base. The female or bisexual flowers remain or sporadically tear above the fruit, they are covered with hairs long near the base, considerably shorter at the apex. Flowering occurs from March to October.
This species occurs from the southern part of the Kimberley to the Kennedy-Blackstone Range and east to central Northern Territory usually along watercourses or redsandy soil and rocky outcrops in dryer regions.