Distribution: Native in most of central and eastern United States; occasionally introduced in Washington.
Habitat: Waste ground.
Flowers: May - September
Conservation Status: Not of concern
Annual, branching from the base, the culms somewhat decumbent, up to 1 m. tall.
Sheaths open, usually glabrous; articulation below the glumes; ligules 2-3 mm. long; blades 5-12 mm. broad, usually glabrous.
Inflorescence an open panicle 1.5-3 dm. long, the branches ascending; spikelets 2-flowered, about 2.5 mm. long; first glume oval, less than 1 mm. long; second glume acute, faintly 9-nerved; lower lemma sterile, with a translucent palea 1-1.5 mm. long; hardened, fertile upper lemma and palea enclosed by the second glume and sterile lemma