179 



Fig. 475. Arctagrostis arundinacea (Trin.) Beal, Grasses N. 

 Am., 2:317. 1896. (Vilfa arundinacea Trin. Unifl., 157. 1824; 

 Icon, t.,55. Sjporobolus arundinaceus Vasey. Colpodium arundina- 

 ceum Hook.). Keed Bent. — A stout perennial 6 to 12 dm. high, 

 with flat leaves and open panicles 20 to 35 cm. long. Spikelets 

 compressed, with nearly equal glumes (a) about 4.5 mm. long. — 

 Alaska and British America. [Northeastern Asia] . July, August. 



