Avena sativa
Avena sativa
Yulaf
Annual. Stems 40-180 cm, smooth, glabrous, erect, solitary to fasciculate. Leaf sheaths usually glabrous; ligule 3-6 mm, obtuse; blades 14-30 cm x 4-10 mm, linear, acuminate, glabrous, sometimes margins scabridulous. Panicle 20-40 x 9-16 cm, effuse or unilateral; branches patent to contracted. Spikelets 22-27 mm, with 2-3 florets. Rachilla segments breaking at their apices and falling attached to lower floret. Glumes subequal, 7-9-veined, Ianceolate, acuminate; lower 22-25 mm, upper 25-27 mm. Lemma 15-17 mm, bidenticulate, tough, glabrous; callus hairy; awn dorsally attached or absent, when present 25-35 mm, geniculate, twisted in lower half. Palea 13-16 mm, ciliate on keels. Fl. 7-8. Cultivated, nr s.l.-1900 m.
N., W. & C. Europe, Mediterranean area, C. & S. Russia, Crimea, Caucasia, N. Iraq, N. & C. Iran, W. Pakistan, E. Asia. Introduced in N. America. Widely cultivated .
