Diffuse in tufts or bunches. Stems erect or occasionally prostrate with erect branches, woody at the base, much branched, the young parts hairy but the older glabrescent. Leaves usually grouped, up to 10 cm long, very narrow, 1-4 mm wide, flat, linear-spathulate, very often revolute and apparently terete; sheaths 3-5 mm long, green at first but soon brown, ciliate, hairy inside, with obtuse auricles at the top. Flowers dioecious, male umbels and those with bisexual flowers on separate plants. Male umbels 3-rayed, the rays 4-7 mm long, densely villous: flowers in groups of three, with 4 acuminate bracts. Bisexual flowers solitary, usually with 2 bracts. Petals densely hairy. Fruit rounded, 4-5 mm diam., usually emarginate at the top, shorter than the acuminate bracts. Mericarps with prominent curved ridges and furrows wrinkled or pitted. Fruit on a stout ray 0.4-1.2 cm long.
Suberect perennial to 50 cm. Leaves indistinctly petiolate, acicular to narrowly oblong, sparsely hairy to glabrous. Flowers yellowish, borne among vegetative leaves. Fruit broadly ovate, shorter than bracts, commissure not constricted.