John Gifford, of Princeton, New Jersey, and that of cut-over 

 timber land, by Mr. H. B. Ay res. 



In the preparation of this book I have freely consulted 

 the "Silva of North America," (Prof. C. S. Sargent): "Illus- 

 trated Flora of the United States," (Britton & Brown); The 

 publications of the Division of Forestry of the Department of 

 Agriculture; "Baume und Strau< 

 & Wilhelm); and Flora von De 

 Schweig, (Prof. Dr. Thome.) 



University of Minnesota, 



St. Anthony Park, 



July 29/1898. 



