Distribution: Southern British Columbia south in both the Southern British Columbia south in both the Olympics and Cascades of Washington, and the Cascades and coastal mountain of Oregon, to Mendocino County, California.
Habitat: Bogs, stream banks, swampy meadows,and moist, shaded woods, from near sea level toabout 5000 feet elevation in the mountains.
Flowers: May - August
Conservation Status: Not of concern
Rhizomatous perennial, the culms 10-15 dm. tall, hollow, usually glabrous.
Sheathes closed at the base, but open for the upper 2-7 cm.; ligules 1.5-3.5 mm. long; blades 3-7 mm. broad, sometimes the uppermost reduced to 1 cm. in length.
Inflorescence a loose raceme 10-25 cm. long; spikelets 5-12, widely spaced, becoming reflexed, 7- to 11-flowered, up to 3 cm. long; glumes scarious, translucent, the first 4-5 mm. long, the second 6-7 mm. long, somewhat lobed; lemmas rounded on the back, with 7 prominent, non-converging nerves, 7-8 mm. long, often tri-lobed at the tip, with a terminal awn 3-10 mm. long; palea shorter than the lemma, with 2 winged keels .