173 



Fig. 167. ARRHENATHERUM EliATIUS (Linn.) Beauv. Agrost. 56. 1812. 

 {Avena datior Linn. Sp. PI. 79. 1753.) TALL OAT-GRASS.— A loosely tufted 

 perennial 6-12 dm, (2°-4°) high, with flat leaves and narrow, loosely flowered 

 panicles 15-20 cm. (6'-8') long. Spikelets (o) 8-10 mm. (4"-5") long; second 

 glume larger than the first, 3-nerved, about equaling the florets; flowering 

 glumes (b) about 8 mm. (4") Jong; awn geniculate near the middle, twisted 

 below, divergent above; grain pubescent.— In fields and waste places, Maine 

 and Ontario to Georgia and Tennessee, also on the Pacific coast. Introduced 

 from Europe as a fodder grass and now widely naturalized. June to August. 



