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Annual grass from fibrous roots; stems smooth or hairy only at the nodes, 30-80 cm tall.
Sheaths usually smooth to finely hairy; blades (2) 3-8 mm wide, flat, usually somewhat soft-hairy (to smooth); ear-shaped lobes lacking at the leaf-bases; ligules smooth or sparsely hairy on the outer surfaces, minutely or coarsely jagged, (2) 1.5-3 mm long.
Inflorescence a loose, usually nodding panicle, (5) 7-20 cm long, with all the branches and flowers on 1 side of the axis; spikelets 5- to 9-flowered, strongly compressed, smooth to short-hairy, 10-20 mm long; florets ultimately spreading, exposing the curved rachilla joints; lower glumes lanceolate, 3- to 5-nerved, 4-6 mm long, the upper ones broader, cylindrical or more or less egg-shaped to lanceolate, 5- (7-) nerved, 5-8 mm long; lemmas rough, without prominent nerves, somewhat compressed, (6) 7-9 mm long, the margins usually in-rolled, rounded at the tips, bidentate, awned, the awns about 5 mm long, flattened, in age usually broadly spreading to somewhat zig-zagging, sometimes reduced to 1-2 mm long; paleas about equalling or exceeding the lemmas; anthers about 1 mm long.
Source: The Illustrated Flora of British Columbia