Annual. Culms slender, erect, 12–40 cm tall, usually unbranched, 5–8-noded. Leaf sheaths reddish with age, hispid, hairs tubercle-based; leaf blades linear, 1.5–9 × 0.2–0.4 cm, abaxial surface green, smooth and glabrous, adaxial surface reddish, setose with tubercle-based 3–5 mm bristles, especially near margins; ligule ca. 0.5 mm. Raceme solitary, 2–5.5 cm, slightly flexuous; rachis flattened, 0.4–0.7 mm wide, margins narrowly winged, densely ciliate with white silky hairs; internodes ca. 1.5 mm; pedicels 0.3–0.5 mm, white bearded on outer margin. Spikelets oblong, 3.5–4 mm, reddish brown or purplish brown; glumes papery, sharply keeled, keel of upper glume broadly winged from base to apex, lower glume keel and upper glume wing margin densely white-ciliate, abaxial flank silky-white villous near margin, adaxial flank sparsely hairy, apex acute; upper lemma oblong, ca. 2.7 mm; awn 12–14 mm, geniculate; upper palea absent. Anthers ca. 1.2 mm. Caryopsis oblong, ca. 2.5 mm. Fl. and fr. autumn.

Hillsides, roadsides, damp waste ground; below 1000 m. Anhui, Fujian, Guangdong, Guangxi, Jiangsu, Jiangxi, Zhejiang [Thailand].