Annuals, caespitose, bisexual. Leaves: ligule an eciliate membrane; blade once-folded in bud. Inflorescences one-sided, a single raceme or paniculate (with short, stout branches), narrow, rigid. Spikelets pedicellate, laterally compressed, falling with glumes and pedicel, tardily disarticulating between florets or not, with 3–8 bisexual florets; pedicel stout, to 1 mm long; rachilla extension with incomplete florets. Glumes 2, very unequal, shorter than spikelet, obtuse to emarginate, awnless, dorsally rounded, smooth, glabrous; lower glume 1–5-nerved; upper glume 5–9-nerved. Lemmas rounded to emarginate, awnless, decidedly firmer than glumes, leathery with membranous margins, keeled, 5–7-nerved. Lodicules membranous. Caryopsis trigonous; hilum short, round; embryo small.