Virgate perennial, up to 0.2 m tall. Leaves linear to narrowly lanceolate, sessile or rarely ± petiolate, glabrous. Umbels eiher male or bisexual on separate plants. Male umbellules 3-flowered, bracts 2. Bisexual umbellules 1-flowered, bracts 2. Flowers purplish, with a well-developed stylopodium. Fruit oblong, mericarps laterally compressed, distinctly ribbed, smooth between ribs, prominently bulging on either side of commissure, homomericarpic.
Erect, tufted perennial from a slightly woody base, to 20 cm, with persistent leaf bases. Leaves rarely somewhat petiolate, linear. Flowers purplish, with prominent purple, cone-shaped stylopodia. Fruit relatively small, oblong, longer than bracts, distinctly ribbed, not wrinkled.