Avena barbata Pott ex Link  
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Family: Poaceae
Barbed Oat, more...slender oat, slender oats, slender wildoat, Slender Wild Oats
[Avena almeriensis Gand., moreAvena deusta Ball, Avena hirsuta Moench, Avena hoppeana Scheele, Avena sallentiana Pau, Avena sativa var. barbata (Pott ex Link) Fiori, Avena sesquitertia hort. ex Steud., Avena strigosa subsp. barbata (Pott ex Link) Thell.]
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Bernard R. Baum. Flora of North America

Plants annual. Culms 60-80(150) cm, initially prostrate, generally becoming erect. Sheaths of the basal leaves pilose, distal sheaths usually glabrous; ligules 1-6 mm, obtuse; blades 6-30 cm long, 2-20 mm wide, glabrous or pilose. Panicles 15-35.5(50) cm long, 6-12 cm wide, erect or nodding. Spikelets 21-30 mm, with 2-3 florets; disarticulation beneath each floret; disarticulation scars elliptic to triangular. Glumes subequal, 15-30 mm, 7-9-veined; calluses bearded, hairs 2-3 mm; lemmas 15-26 mm, densely strigose below midlength, apices acute, biaristate, veins extending 2-4 mm beyond the apices, awns 30-45 mm, arising about midlength, geniculate; lodicules narrowly triangular, without lobes on the wings; anthers 2.5-4 mm. 2n = 28.

Avena barbata is native to the Mediterranean region and central Asia. It has become naturalized in western North America, particularly California, displacing native grasses It was collected once in Vancouver, British Columbia, but should be considered a waif there..

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