Perennials with branched suberect rhizomes, glabrous, cushion-forming. Stems ±regularly forked and covered with persisting leaves which are wilted in proximal part and live in the most distal part. Leaves regularly densely and strictly distichously inserted along stem, with a wide sheath clasping the leaf above; blade shorter than or equalling sheath, terete. Inflorescence reduced to a single lateral subterminal flower. Plants dioecious. Bracteoles 2–4, minute, scarious. Tepals lanceolate, 4–10 mm long. Staminate flower long pedicellate. Stamens 6, with linear mucronate anthers about 10 times as long as the filaments. Pistillate flower short pedicellate; ovary on short gynophore; style with 3 filiform papillose stigmas. Capsule unilocular, lifted on a gynophore at ripening. Seeds many; outer seed-coat loose, irregularly wrinkled.