Annual. Culms very slender, straggling, branching and rooting at lower nodes, 10–25 cm tall, nodes hispid with a glandular ring below. Leaf sheaths shorter than internodes, papillose-hispid at base above node, otherwise pilose or subglabrous, outer margin ciliate; leaf blades ovate or ovate-lanceolate, 2–3 × 0.8–1 cm, scabrid to thinly hispid, base cordate-amplexicaul with pectinate margin, apex shortly acuminate; ligule ca. 2 mm. Panicle narrowly ovate to pyramidal in outline, 2.5–5 cm, glandular; primary branches inserted singly, stiffly and regularly spreading with branchlets to their base; pedicels mostly shorter than spikelets. Spikelets plumply elliptic, 1.3–1.8(–2) mm, gray-green or purplish green; florets clearly dissimilar; lower floret male, upper floret bisexual or female; glumes slightly shorter than lower floret; lower glume elliptic-oblong, 5-veined, upper glume broadly elliptic, 7-veined both glabrous, apex obtuse; lower lemma herbaceous, elliptic-oblong, dorsally flattened, smooth, glabrous; anthers 0.3–0.5 mm; upper lemma slightly shorter, crustaceous, strongly plano-convex, pubescent. Fl. and fr. May–Oct.
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