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DescriptionAnnuals or perennials. Inflorescence of several to many racemes, arranged on a central axis. Spikelets 1-several-flowered, laterally flattened, disarticulating above the glumes and between the florets. Glumes persistent, membranous, 1-nerved, shorter than the spikelet. Lemmas 3-nerved, obtuse or 2-toothed at the apex, sometimes mucronate, rarely with a short awn.