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Annual grass from fibrous roots; stems erect, usually more or less short-hairy at the nodes and just below, 20-90 (120) cm tall.
Sheaths usually open for 1-2 cm, densely soft-hairy, the hairs spreading to slightly angled backwards; blades 2-5 (9) mm wide, flat, hairy; ear-shaped lobes lacking at the leaf-bases; ligules usually hairy, sometimes smooth, jagged and usually more or less fringed with fine hairs, 0.5-1.5 (3) mm long.
Inflorescence a loose panicle, mostly 7-15 (20) cm long, the branches ascending to stiffly spreading but rarely wavy; spikelets 5- to 9- (11-) flowered, flattened, lanceolate, smooth or rough short-hairy, 13-20 mm long, the stalks mostly longer than the spikelets; lower glumes lanceolate, (3) 5-nerved, 5-7 mm long, the upper ones lanceolate, (5-) 7- (9-) nerved, 6-9 mm long; lemmas rough with faint nerves, somewhat compressed from top to bottom, (8) 9-10 (11) mm long, rounded at the tips, bidentate, awned, the awns straight to somewhat abruptly bent, 4-10 mm long; paleas 1-2 mm shorter than the lemmas; anthers mostly included in the lemmas, 1-1.5 (2) mm long.
Source: The Illustrated Flora of British Columbia