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Caryopsis dorso-ventrally compressed, deeply grooved, tightly enclosed by the lemma, free, with a linear hilum; embryo 1/5-1/4 the length of the caryopsis.
Perennial, densely caespitose grasses with erect, usually simple culms and long linear leaves; ligule a rim of long or short cilia.
Panicles erect, narrow, more or less densely contracted, usually interrupted.
Glumes persistent, narrow, acute or acuminate, 3-5-nerved, awned or awnless.
Spikelets 1-flowered, pedicelled, in terminal laxly contracted panicles.
Palea very small, scale-like, indurated at the base, 2-nerved, glabrous.
Ovary glabrous; styles free; stigmas 2, plumose.
Lodicules 2, slightly longer than the palea.
Floret hermaphrodite, exceeding the glumes.
Rhachilla disarticulating above the glumes.
Stamens 3.
