Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Wet places, usually where disturbed, especially along roads, streambanks, and open fields.
Conservation Status: Not of concern
Strongly rhizomatous perennial, the culms hollow, 7-14 dm. tall.
Sheaths open; ligules 4-10 mm. long, obtuse; blades flat, 7-17 mm. broad.
Inflorescence a compact panicle 8-15 cm. long, but the branches somewhat spreading; spikelets 3-flowered, strongly compressed, the uppermost floret perfect, the lower two represented by sterile lemmas; glumes slightly unequal, 4.5-5 mm. long, acute, 3-nerved; sterile lemmas 1-1.5 mm. long, brownish, hairy; fertile lemma 3-4 mm. long, subglabrous, 5-nerved; palea subequal to the lemma, 2-nerved.