31 



Fk;. t)l3. Elymus robustus Sciibn. k tjiiiith. IJ. 8. Dopt. Ayr., 

 Div. Agios. IJuU. 4 : 37. 1897. Gueat Ly.me-gkass. A stout, 

 leafy perennial "J to 18 dm. high, with thick, tiTniiiial, loug-heardcd 

 Bjiikes 10 to It cm. long. .Sjtikelets ii- to l-lloworcd, with lincar- 

 subiilato eni])ty gliinios and Kcalirmis or piilu-scunt liowning 

 glumes. Awns spreading 3 to 4 cm. long. h'ich moist soil, Illinois, 

 and Montana to Kausas and Now Mexico. June-September. 



