n 9 



Ag-ropyroii spicatum, (Pursh.) Scrib. & Smith. Western 

 Wheat-grass. Alkali-grass. 



Throughout the state. In the James and Missouri 

 valleys^ it forms a great portion of the forage. It prefers 

 a damp, heavy, somewhat alkaline soil. It is not com- 

 mon on the prairies in the eastern part of the state, but 

 is becoming more abundant where the land is broken. 



Aft-ropyroii teiierum, Vasey. Slender Wheat-grass. 

 Common on dry prairies throughout the state. 



Agropyrou stryg-osum, Beauv. Rough Wheat-grass. 

 In sterile soil along Indian creek in the Bad Lands. 



Agropyrou caiiiimm, (L ) R. & S. Awned Wheat-grass. 

 Common in the Sioux valley and in the Black Hills, 

 probably throughout the state. 



Hordeum Jubatuiu, L. Squirrel-tail-grass. 



A very common and troublesome weed in all waste 

 places throughout the state. 



Elymus striatus, Willd. Slender wild rye. 



On banks of streams from the Missouri valley east- 

 ward, and in the Black Hills. 



Elymus virg'iiii<'iis, L,. Terrell-grass; wild rye. 

 Common along streams throughout the state. 



Elymus caiiadeiisis, L. Nodding wild rye. 



Common along streams throughout the state. Most 

 of the material from the arid regions west of the Mis- 

 souri river and in the Black Hills belongs to the variety 

 Glaucifolius Torr. 



Elymus Maoounii, Vasey. Macoun's wiU rye. 

 In the Little Minnesota valley. 



Elymus Elymoides, (Raf.) Swezey. Long-bristled wild 

 rye. 



From the Missouri river westward; rare. 

 Elymus dasystachys, Trin. Western wild rye. 



In the Black Hills. 



