PREFACE 



through the courtesy of the Bureau of Fores- 

 try, United States Department of Agriculture. 

 My grateful acknowledgments are due Mr. 

 Overton W. Price, Assistant Chief of the 

 Bureau of Forestry, for photographs chosen 

 out of his collection to supply the plates 

 facing pages 69, 148, 158. The remaining 

 illustrations have been reproduced from pho- 

 tographs in my own collection. 



Notes of reference, which are indicated by 

 superior figures in the text, and an index to 

 the names of the trees that have been de- 

 scribed or specially referred to in these pages, 

 will be found at the close of the book. The 

 index has been compiled from a well-known 

 bulletin of the Bureau of Forestry, United 

 States Department of Agriculture, entitled 

 "Check List of the Forest Trees of the United 

 States." Courteous acknowledgment is here 

 made to the author, Mr. George B. Sudworth, 

 and to the Division of Publications, of the 

 same Department, for kind permission to 

 make extracts from the bulletin referred to. 



