Relatively robust, tufted, erect perennial, up to 0.5(-0.9) m tall. Leaf sheaths with conspicuous, whitish, papery ligules, blades rigid. Stems cylindrical, 1-2 mm diam., rigid. Inflorescence a single, terminal, oblong head, 15-30(-55) x 5-7(-10) mm, basal bract short and inconspicuous or erect, rigid, and longer than spikelet cluster. Spikelet glumes blackish.
Relatively robust perennial to 40 cm. Spikelets large, dark.