210 IOWA ACADEMY OF SCIENCES. 



POA L. 



81. P. compressa L. [nfrequent, woods and prairies. 



82. P. pratcHsis L. Keiituck}^ Blue-grass. Everywhere 



along roadside, but not native to this region. 



83. P. fiava L. (P. serofitia Ehrh.) Frequent, woods and 



prairies. 



84. P. si/lvesfris A. Gray. Frequent in woods. 



ScoLOCHLOA Link. 



85. S. festucacea. (Willd.) Link. Graphciihorum fes- 



tiicaceum A. Gray. Frequent in marshes. This 

 is the southern limit of the species in the United 

 States so far as known. 

 Panicularia Faor. 



86. P. nervati. (Willd.) Kuntze. {Glyceria iiervata 



Trin.) Low woods and prairies; common. 



87. P. americana. (Torr.) Mac M. {Glyceria grandis 



Watson.) A robust species common in marshes. 



88. P. finitans L. Kuntze. {Gli/ceria Jfulfa/is L.) Com- 



mon in marshes. 

 Festuca L. 



89. F. nutcms (Willd.) Low woods, Esther ville and Iowa 



Lake. 



Bromus L. 



90. B. ciliatiis L, Common in woods and very variable. 

 9L B. secalimis L. Chess, Cheat. Becoming quite com- 

 mon; introduced from Europe into wheathelds. 



Agropyron J. Gaertn. 



92. A. occidentale Scribner. {Agropyrum spicatum Scrib. 

 & Smith.) Common on dry prairies; a very good 

 pasture grass. 

 ^3. A. tenerum Vasey. Woods and prairies; common. 



94. A. caniniim (L) R. and S. {Agropyrum loiihderale 



Vasey.) Rare on dry praries. 

 Hordeum L. 



95. JLJuhatunih. Wild Barley. A troublesome weed, 



everywhere common. 



