Perennials, up to 45 cm. Rhizome creeping. Stem almost terete or trigonous. Leaves subbasal, up to equalling stem. Inflorescence a distichous multiple spike with 3-18 spikes, lowermost bract often leaf-like. Spikes with 3-c.10 spirally arranged glumes. Flowers bisexual or apical ones often unisexual and female; perianth bristles 4-7, or reduced; stamens 2-3; stigmas 2. Nut 2-4.5 mm, lenticular.