354 



GRASSES OF IOWA. 



Fig. 162. Bromus tectorum. A nearly worthless annual found here and there in the 

 state. (F. Lamson-Scribner. Dlv. Agrcst. U. S. Dept. of Agrl.) 



WATER FREE SUBSTANCE. 



1. U. S. Dept. Agrl. Exp. Sta. Bull. 11: 39. 



2. Ann. Rept. Mississippi Agrl. Exp. Sta. 8: 90. 1895. 



3. Bull. Oregon Agrl. Exp. Sta. 39: 44. 1895. 



