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Slender, lax, decumbent annual to 5(–10) dm; blades 2–7 cm × 5–15 mm; spikes few–several, digitate, 2–8 cm; normal spikelet (2–)3–5(–8) mm, the lower glume 4–15-veined and with the veins usually spiculate-scabrous at least distally, the upper inconspicuously 3-or 5-veined; sterile lemma virtually veinless, the fertile one 1-veined, often with a supra-basal awn to 10 mm; anthers usually 2; sterile spikelet reduced to the 1–4 mm pedicel, or obsolete; 2n=10. A weed of moist or wet soil, native to se. Asia, now widely intr. in warm regions, and found here and there in our range, n. as far as Mo. and s. N.Y.
