306 



GRASSES OF IOWA. 



DESCRIPTION. 



Iowa. Ames (Carver, B. W. Wilson, C. A. Wilson, F. Rolfs, 

 Hodsori, 1 15 1 Louthan) ; Cedar Falls (Carver); Keystone (Koch); 

 Dubuque ( Pammel ) . 



North America. Introduced from Europe. Missouri (St. Louis, 

 Pammel), Colorado (Ft. Collins, Crandall). 



17. BROMUS SQUARROSUS. 



Bromus squarrosus L. Sp. PI. 76. 1753. Beal. Grasses of N. A. 

 2: 617. 1896. Nash in Britton and Brown. 111. Fl. 1: 223. f. 516. 1896. 

 Shear. Bull. U. S. Dept. Agrl. Div. Agros. 23: 21. /. 6. 1900. 



Serrafalcus squarrosus Bab. Man. Brit. Bot. 375. 1843. 



Fio. 216. Bromus squarrosus— a, spikelet, with empty- 

 glumes and four flowers ; b, awned flowering glume. (Div. 

 Agros. U. S. Dept. Agr. ) 



