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Annuals, caespitose to decumbent, bisexual. Leaves: ligule a very narrow ciliate membrane; blade rolled in bud. Inflorescence a panicle of numerous small spicate branches which become deflexed at maturity; branches disarticulating or persistent, not bare-tipped, with the lower spikelets often replaced by small deciduous branchlets, with spikelets secundly arranged. Spikelets biseriate, sessile, laterally compressed, with 1–3 bisexual florets, disarticulating above the glumes and sometimes between the florets when applicable; rachilla extension with incomplete florets or naked. Glumes 2, ±equal in length, exceeding the florets, aristulate to awned, carinate (subulate), 1–2-nerved. Lemmas awnless to aristulate, slightly carinate or rounded, 3-nerved. Stigmas red. Caryopsis trigonous; hilum short; pericarp fused.
Annuals. Culms tufted. Leaf blades linear, flat; ligule a lacerate or ciliate membrane. Inflorescence of elongate or cuneate racemes along a central axis, these deciduous or with deciduous secondary branchlets; spikelets sessile, biseriate, closely imbricate. Spikelets cuneate, laterally compressed, florets (1 or)2 to several, rachilla eventually disarticulating above glumes and between florets; glumes much longer than and enclosing the florets, subequal, often leathery, sometimes 3-veined, strongly keeled, acute to caudate or aristate; lemmas thinly membranous, 3-veined, pubescent on veins or glabrous, keeled, acute to emarginate, with or without a mucro; palea slightly shorter than lemma, hyaline. Caryopsis elliptic, trigonous.
Spikelets cuneate, laterally compressed, 1–several-flowered, eventually disarticulating above the glumes and between the florets; glumes 1–3-nerved, membranous or coriaceous, subequal, acuminate-aristate, much longer than the florets, strongly keeled; lemmas 3-nerved, thinly membranous, lightly keeled, glabrous or pilose on the nerves, the apex acute to 2-lobed.
Inflorescence composed of few to numerous secund racemes irregularly scattered along a central axis; racemes varying from short, broad and crowded to linear and distant, deciduous from the main axis at maturity or persistent but with deciduous branchlets, the spikelets sessile, biseriate, closely overlapping.
Caryopsis elliptic-oblong, shallowly concave on the hilar side, trigonous in section.
