113 



Sporobolus (•iisi>i(latus, Torr. Prairie Rush-grass. 

 In dry soils throughout the state. 



Sporoboliis iiej»"lectus, Nash. Small Rush-grass. 



In the Minnesota region. Collected but once along 

 an old Indian trail. 



Sporobolus airoides, Torr. Hair-grass. Dropseed. 

 In the Missouri river to the Black Hills. 



Sporobolus eryi)taii(lrus, (Torr.) Gray. Sand Drop- 

 seed. 



In sandy soil from the Missouri river eastward. 



Sporobolus lu''terolt'i)is, Gray. Northern Dropseed. 



In low prairies throughout the state from the Missouri 

 river eastward. In the Minnesota region it often forms 

 a large part of the lowland hay. 



Sporobolus asporifollus, (Nees & Meyen.) Thurber. 

 Rough -leaved Dropseed. 



In dry soils from the James river valley westward. 



Ciiiiia Aruiidinacea, L. Wood Reed-grass. 

 In the southern part of the Sioux valley. 



Ciiiiia latifolia, (Trev.) Griseb. Slender Wood Reed- 

 grass. 



Cmna Pendula^ Trin. 

 In woods in the Sioux valley near Brookings. 



AgTostis alba, L. Red-top. 



Sparingly introduced in the Minnesota and Sioux 

 river valleys. 



Agrostis exerata, Trin. Rough-leaved Bent-grass. 

 In the Black Hills. 



Agrostis eaiiiiia, L. Brown Bent-grass. 

 In the Missouri rivei valley; rare. 



Aj»Tostis poreiiuaiis, (Walt.) Tuckerm. Thin-grass. 



In rich woods in the Minnesota valley and the Black 

 Hills. 



