Perennial herb, up to 0.6 m high. Plants tufted. Leaves filiform, 0.5-0.75 mm in diameter. Inflorescence axis single-noded or nodeless. Achene length 4-5 mm.
Tufted, perennial herb, up to 0.6 m high. Leaves filiform, 0.50-0.75 mm in diameter. Culms single-noded or nodeless. Fruit a nutlet, 4-5 mm long.