Plants annual; tufted. Culms 2-15 cm tall, to 0.3 mm wide, erect. Leaves primarily basal; sheaths closed almost to the top; auricles absent; ligules about 1 mm, hyaline, truncate; blades 0.3-1 mm wide, flat or involute. Inflorescences terminal racemes, spikelike, rachises smooth, glabrous. Spikelets 1.8-3 mm, imbricate, in 2 rows on 1 side of the rachis, slightly laterally compressed, with 1 floret; rachillas not prolonged above the florets; disarticulation above the glumes and beneath the florets. Glumes subequal, surpassing the florets, glabrous, smooth, 1-veined, rounded on the back, unawned; calluses glabrous; lemmas about 2/3 the length of the spikelets, elliptical in side view, thinner than the glumes, 5-veined, shortly and densely pubescent throughout, unawned, apices truncate, often denticulate; paleas about as long as the lemmas, 2-veined, shortly and densely pubescent between the inconspicuous keels; lodicules 2; anthers 3; ovaries glabrous; styles fused at the base, dividing into 2 feathery stigmas. Caryopses elliptical, terete, 2/3 the length of the lemma, enclosed by, but not fused to, the lemma and palea at maturity; embryos about 1/5 the length of the caryopses, elliptic; hila punctate, basal. x = 7. Name of uncertain origin.