Perennials, to more than 1 m. Rhizome short, emitting tillers. Stem 0.5-5 mm diam., terete. Leaves basal, up to as long as stem. Inflorescence a pseudolateral multiple spike of from 1 to more than 100 globose heads of congested spikes. Spikes 1.5-4 x 1-2 mm, ovoid, with 10-30 spirally arranged glumes. Flowers bisexual, perianth bristles 0, stamens 3, stigmas 3. Nut 1-1.5 mm, trigonous, plano-convex.