16 



this area are included the scrub pine and chestnut oak, with one excep- 

 tion; sorrel tree and the chestnut, with two possible exceptions. The 

 Flats: This is a level stretch of country, here and there deeply eroded. 

 Being level, and the soil a fine compact clay, the drainage is poor .which 

 suggested the local name "flats." The Lower Wabash Valley: This 

 is part of Knox, Gibson and Posey Counties which is usually inundat- 

 ed each year by the Wabash River. 



Acknowledgments. The character and qualities of the wood have 

 for the greater part been taken from the works of Britton and 

 Brown, Hough, and Sargent, to whom indebtedness is acknowledged. 



The Salicaceae, except the genus Populus was written by C. R. Ball, 

 of the Bureau of Plant Industry, Washington, D. C. The Malaceae 

 was contributed by W. W. Eggleston, also of the Bureau of Plant In- 

 dustry, Washington, D. C. These authors were asked to make their 

 part conform to the general plan of the book. Mr. Ball and Mr. 

 Eggleston are recognized authorities on the respective parts they have 

 written and users of this book will appreciate the value of having these 

 difficult parts written by our best authorities. The author wishes to 

 gratefully acknowledge this great favor. 



The most grateful acknowledgement is given to Prof. Stanley 

 Coulter, Dean, School Science, Purdue University, who has read all of 

 the manuscript and made valuable suggestions, corrections and critic- 

 isms. 



I wish to acknowledge the assistance of Stella M. Deam, my wife, in 

 field and clerical work. 



I wish to thank the Department of Conservation for the opportunity 

 of doing this work. 



