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Annual grass from fibrous roots, smooth to short-hairy, basally branched; stems mostly 30-70 cm tall.
Sheaths usually minutely rough but sometimes soft-hairy; blades flat but becoming in-rolled, usually smooth on the upper surfaces but rough on the lower ones, 1-3 mm wide; ligules smooth, rounded, usually jagged, 1-8 mm long.
Inflorescence an open panicle, 10-40 cm long, the branches spreading to drooping; spikelets usually 3-flowered; glumes sometimes awn-tipped, the lower ones 6- or 7-nerved, 5-6.5 mm long, the upper ones 8- or 9-nerved, 7-9 mm long; lower lemmas slightly exceeding the glumes, awned from long-pointed tips, the awns 1-3 mm long; upper 1 or 2 lemmas with bristlelike teeth, the teeth 1.5-2 mm long, awned, the awns attached on the backs, twisted and abruptly bent, 10-16 mm long; lodicules about 0.7 mm long; anthers about 1.3 mm long.
Source: The Illustrated Flora of British Columbia