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Annuals, small. Leaf blades rolled. Inflorescence an open or contracted panicle. Spikelets small, laterally compressed, florets 2, both alike, bisexual, separated by very short internode, disarticulating below each floret; rachilla not extended beyond upper floret; glumes persistent, equal, enclosing florets, ovate, membranous, shining, 1(–3)-veined, apex acute; floret callus small, usually shortly bearded laterally, rarely glabrous; lemmas ovate, rounded on back, membranous becoming firm at maturity, indistinctly 5-veined, glabrous, upper part scaberulous to scabrid, awned from lower back or lower floret awnless, apex 2-toothed; awn geniculate with twisted column; palea slightly shorter than lemma. Anthers small. Caryopsis fusiform. 2n = 14, 28.
Spikelets 2-fld, disarticulating above the glumes and between the lemmas; rachilla very short, not prolonged beyond the upper palea; glumes subequal, exceeding the lemmas, ovate, obscurely 1–3-veined, acute or acuminate; lemmas firm, elongate, rounded on the back, obscurely 5-veined below, tapering into 2 pale setaceous teeth, one or both lemmas awned; awn arising from below the middle, bent, the straight stout lower part about equaling the body of the lemma, the slender terminal part longer, exsert; palea enclosed by the involute lemma; small annual grasses with short, very narrow blades and diffuse or spike-like panicles. 12, irregularly cosmop. (Aspris)
Small annuals, with slender culms and delicate open, or sometimes contracted, panicles. Spikelets small, 2-flowered, both florets bisexual, the rhachilla glabrous and very short between the florets, minutely produced beyond the upper floret; glumes delicately membranous, 1-nerved, glabrous; lemma lanceolate, shorter than the glumes, faintly 5-nerved, 2-toothed, rounded on the back, dorsally awned or awnless; callus minute, obtuse; stamens 3; stigmas 2
Lemmas shorter than the glumes, subequal, slightly distant, broadly lanceolate, dorsally rounded, faintly 5-nerved, very thinly membranous, hyaline, broadly lanceolate, with the apex acute to acuminate and usually shortly 2-dentate, margins usually involute, dorsally awned from beneath the middle, rarely awnless; awn geniculate, twisted below the bend (straight when moistened); callus rather short, obtuse, pilose or glabrous.
Spikelets strongly laterally compressed, pedicelled, rather small, strictly 2-flowered, awned or rarely muticous; rhachilla disarticulating above the glumes and between the florets, very shortly produced beyond the superior floret, glabrous; florets 2, both bisexual, similar.
Caryopsis oblong to narrowly elliptic in outline, tightly enclosed by the lemma and palea; hilum oblong, rather small; embryo subcircular, 1/3-1/4 the length of the caryopsis.
Glumes 2, subequal and similar, persistent, thinly membranous, usually hyaline, exceeding the florets except for the awns, 1-nerved, keeled, muticous.
Paleas slightly shorter than the corresponding lemmas, 2-nerved, 2-keeled, narrowly oblong, with the apex 2-dentate.
Ovary glabrous; styles distinct, short, stigmas plumose, rather short, laterally exserted.
Inflorescence a panicle, many-flowered, usually open.
Ligule a membrane.
Small annuals.
Lodicules 2.
Stamens 3.
