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Perennial grass from creeping rhizomes; stems hollow, erect, 25-85 cm tall.
Sheaths usually minutely rough near the base; blades flat, 2-4 (5) mm wide, 4-16 cm long, rough- hairy below, hairy above; ligules membranous, jagged to fringed with fine hairs, squared-off at the tips, 0.5-1.5 mm long.
Inflorescence a narrow, spikelike, compact, densely flowered, interrupted or lobed panicle, 2-15 cm long, 5-24 (28) mm wide, the branches 0.5-5 cm long, appressed, ascending; spikelets 1-flowered, nearly unstalked to short-stalked; glumes very narrow, long-pointed to awn-tipped, 1-nerved, minutely rough on the nerve, usually minutely short-hairy, about equal, 2-4 mm long; lemmas lanceolate, greyish-green, the bodies from slightly shorter to somewhat longer than the glumes (not including the awn tips), 2-3.5 mm long, awned, the awns slender, terminal, (1) 4-10 mm long, the calluses bearded with numerous silky hairs nearly or fully as long as the lemmas; paleas lanceolate, almost equal to the lemmas, with silky hairs between the nerves near the base, the tips long-pointed; anthers 0.4-1.5 mm long, yellow.
Source: The Illustrated Flora of British Columbia