119 



Aj»Topyron .spicatuiii, (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. 



A^Topyroii teiieruiii, Vasey. Slender Wheat-grass. 

 Common on dry prairies throughout the state. 



Aj>roi)yroii stryj;osuiii, Beauv. Rough Wheat-grass. 

 In sterile soil along Indian creek in the Bad Lands. 



Aj>T<)i)yr<)ii caiiiiiuiii, ( L ) R. & S. Awned Wheat-grass. 

 Common in the Sioux valley and in the Black Hills, 

 probably throughout the state. 



Hordeuin Jubatuiii, L. Squirrel-tail -grass. 



A very common and troublesome weed in all waste 

 places throughout the state. 



Elyiuus striatus, Willd. Slender wild rye. 



On banks of streams from the Missouri valley east- 

 ward, and in the Black Hills. 



Elyiiius virg'iiiifus, L. Terrell-grass; wild rye. 

 Common along streams throughout the state. 



Elyiuiis canadensis, 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. 



Elyiiius 3Iacouiiii, Vasey. Macoun's wild rye. 

 In the Little Minnesota valley. 



Eiyiiius Elyiiioides, (Raf.) Swezey. Long-bristled wild 

 rye. 



From the Missouri river westward; rare. 



Elynms dasystacliys, Trin. Western wild rye. 

 In the Black Hills. 



