ACKNOWLEDGMENTS. 



In preparing this work, the author desires to acknowl- 

 edge the assistance derived from "Grasses of North 

 America," by W. J. Beal, "Forage Crops and Grasses," 

 by Charles L. Flint, "Grasses and Clovers," by Henry 

 A. Dreer, "Farmers' Book of Grasses," by D. L. Phares, 

 and bulletins issued by several of the experiment sta- 

 tions in the United States and Canada, also by the Unit- 

 ed States Department of Agriculture. 



For the sketches, the author is indebted to Prof. A. 

 M. Soule, Director Experiment Station, Knoxville, 

 Tenn., William T. Shaw, Corvallis, Oregon, and the 

 Bureau of Plant Industry of the United States De- 

 partment of Agriculture. 



To all persons in the United States who are inter- 

 ested in the growing of grasses or in grazing^ this vjork 

 is most respectfully dedicated hy the Author. 



University of Minnesota, 1903. 



