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Annuals or perennials. Leaf-blades flat or rolled, sometimes aromatic; ligule membranous. Inflorescence of single or subdigitate racemes, these with or without homogamous pairs at the base; internodes and pedicels linear, solid. Sessile spikelet dorsally compressed; callus very short, rounded; lower glume broadly convex to slightly concave on the back, abruptly rounded on the flanks, with or without a circular pit; lower floret reduced to a hyaline lemma; upper lemma stipitiform, entire or rarely minutely bidentate, with a glabrous or puberulous awn. Caryopsis oblong, dorsally compressed. Pedicelled spikelet much like the sessile.
Inflorescence of single, digitate or subdigitate racemes, these rarely branched below; spikelets conspicuously imbricate, those of a pair subequal to equal or unequal in size and shape, usually differing in sex except the lowermost 1–6 pairs which are, with rare exceptions, homogamous and male or neuter; rhachis internodes and pedicels solid.
Sessile spikelet callus obtuse; inferior glume chartaceous to cartilaginous, broadly convex to slightly concave, sometimes pitted, acute to broadly obtuse at the apex; superior lemma forming the hyaline base to its awn, entire; awn glabrous.
Pedicelled spikelet similar to the sessile spikelet, male or neuter, awnless, rarely bisexual and awned.
Annuals or perennials.
