开穗雀稗 kai sui que bai

Perennial, forming coarse tussocks. Culms erect or geniculately ascending, 30–120 cm tall, nodes pubescent. Leaf sheaths often hispid; leaf blades linear-lanceolate, flat, 9–50 × 0.6–2.5 cm, scabrid or hispid, margins usually undulate, apex acuminate; ligule 0.2–0.5 mm. Inflorescence axis 5–20 cm; racemes 7–60, fascicled, 4–12 cm, ascending or spreading; spikelets paired; rachis ca. 0.5 mm wide. Spikelets brown at maturity, orbicular or obovate, 1–1.5 mm; upper glume membranous, subequaling spikelet, 3-veined, pubescent; lower lemma resembling upper glume, subglabrous on central portion of back; upper lemma as long as spikelet, pallid at maturity.

Moist places along roadsides, naturalized. Taiwan [native to Africa, Australia, New Guinea, Pacific Islands (Polynesia), and South America].