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DescriptionPerennials, usually rhizomatous and/or stoloniferous and sward-forming. Inflorescence of digitate 1-sided racemes, sometimes borne in 2 or more closely-spaced whorls. Spikelets borne on a flat or semi-terete (crescent-shaped in section) rhachis. Spikelets 1-flowered, with or without a rhachilla-extension, sessile, laterally flattened, alternate in 2 rows, tardily disarticulating above the glumes. Glumes subequal, membranous, 1-nerved, shorter than the floret. Lemma membranous, keeled, acute or emarginate, awnless.