viii Preface 



species. Sixty-nine of these drawings are original, the work of 

 Bruce Eastman or Robert Lorenz. The remaining drawings 

 were taken, with permission, from the following sources: 



1. United States Forest Service. Publications of Sudworth 

 and Timber Pines of the South. All of the drawings of coni- 

 fers except those on pages 8, 16, 20, 32, 54, 66, 80, and 108; 

 also the drawings on pages 158, 170, 172, 184, 186, 210, 236, 

 300, 316, 332, 340, 350, 352, 356, and 370. The map showing 

 Forest Regions also was secured from the United States Forest 

 Service. 



2. Otis, Michigan Trees. The drawings on pages 16, 20, 54, 

 66, 108, 122, 132, 136, 140, 142, 144, 148, 150, 152, 162, 164, 

 166, 168, 180, 190, 192, 196, 198, 216, 218, 222, 226, 228, 234, 

 238, 242, 246, 248, 250, 260, 262, 264, 272, 274, 276, 

 282, 286, 296, 298, 302, 306, 318, 326, 330, 346, 348, 350, 352, 

 360, and 366. 



3. I Hick, Pennsylvania Trees. The drawings on pages 240, 

 288, 290, 310, 322, 334, 336, 340, and 356. 



4. Hanzlik, Trees and Forests of Western United States. The 

 drawings on pages 8 and 80. 



Both the author and publisher wish to thank the individuals 

 and organizations involved for permission to make use of these 

 drawings. 



Richard J. Preston, jr. 

 August, 1948 



PREFACE TO SECOND EDITION 



This edition follows, with the exception of Pseudotsuga taxifolia 

 for the scientific name for Douglas-fir, the scientific and common 

 names appearing in the USDA Agriculture Handbook No. 41, 

 Check List of Native and Naturalized Trees of the United States 1953. 

 This has resulted in numerous changes in nomenclature and 

 accepted species. Keys have been revised and other corrections 

 made. Drawings for 12 plates were re-drawn in whole or in part 

 by Tom Olive. 



Richard J. Preston, jr. 

 April, 1960 



