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Annual grass from fibrous roots; stems erect or ascending, 20-110 cm tall.
Lower sheaths densely soft-hairy, the hairs often directed downwards, the upper sheaths smooth to hairy; blades soft-hairy on both sides, 1.5-4 mm wide, flat; ear-shaped lobes lacking at the leaf-bases; ligules smooth or hairy, jagged, 1-2 mm long.
Inflorescence an erect, narrow panicle, 4-16 cm long, the branches slender, ascending; spikelets 5- to 7- (9-) flowered, slightly compressed, 10-20 mm long; florets mostly small, closed, self-fertilizing; spikelet stalks usually shorter than the spikelets; glumes lanceolate, smooth to rough, prominently nerved, the lower ones (3) 5-nerved, 4-6 mm long, the upper ones 7-nerved, 4-7 mm long; lemmas rough, distinctly but not prominently 7- (9-) nerved, smooth on the backs, rough on the margins, somewhat compressed from top to bottom, 6.5-8 mm long, the tips rounded, bidentate, awned, the awns 5-9 mm long; anthers 1.5-3 mm long.
Source: The Illustrated Flora of British Columbia