Rhizomatous perennials. Leaf-blades flat or convolute, glaucous. Inflorescence a spike. Spikelets 3-5(-7)-flowered, subsessile, usually imbricate, solitary, paired or in groups of up to 7 at each node of the tough rhachis; rhachilla disarticulating above the glumes and between the florets; glumes narrowly lanceolate to linear-subulate covering the sides of the lower florets, 1-5 nerved, awned or awn-less; lemmas lanceolate, 5-7-nerved, awned or awnless; palea 2-keeled.