Annual, tufted. Culms erect or geniculate at base, slender, 3–45 cm tall, 3–5-noded. Leaf sheaths glabrous, upper slightly inflated; leaf blades soft, 1.5–15 cm, 2–6 mm wide, glabrous, margins scabrid, apex acute; ligule 2–4 mm, obtuse. Panicle narrowly cylindrical, 1–10 × 0.4–0.8 cm, yellowish green; branches free from central axis. Spikelets obovate-cuneate, 2–3 mm; rachilla extension present; glumes inflated toward apex, narrowed toward base, deeply channeled between veins, scabrid, keel glabrous or shortly pectinate, apex truncate, cuspidate into a hard 0.3–0.6 mm mucro; lemma 1.3–2 mm, 5-veined, sparsely appressed-pubescent, apex subobtuse; anthers 0.4–0.8 mm. Caryopsis ca. 1 mm. Fl. and fr. Apr–Aug. 2n = 28.
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