Literature of Xorth American Systematic IJotany 69 



not be ignored, since its colored illustrations make it one of the 

 most attractive of the American books on trees. Although orig- 

 inally published in three volumes, two supplementary volumes 

 were added by Nuttall in the style of the original work. 



Sudworth's Nomenclature of the Arborescent Flora of the 

 United States (1897) and the same author's Check List of the 

 Forest Trees of the United States will necessarily be consulted 

 where the forester wishes to be very exact in the citation of the 

 names and synonyms of our forest trees. 



Sudworth's Forest Trees of the Pacific Slope (1908). 

 This volume of 436 pages, published by the Government, de- 

 scribes the 150 forest trees known to have a habitat in the Pacific 

 coast region of North America north of Mexico. 



I have been helped very often in my study of our American 

 trees by several German books, the best of which are the fol- 

 lowing : 



Koehne's Deutsche Dendrologie (1893), containing many 

 critical notes upon American species. 



Dippel's Handbuch der Laubholzkunde (3 vols., 1889-1893), 

 which is much fuller than the preceding. 



Koch's Dendrologie (2 vols. 1869-1872), an older but still 

 valuable work. 



I add here the names of two little known old books on 

 American trees. It is needless to say that it is only in extreme 

 cases that they will be useful to the forester, yet he should know 

 about them, and also know where he can find copies should the 

 occasion for using them ever arise. 



\Yangenheim's Beytrag zur Forstzvissenschaft (1787) de- 

 scribes and figures many American species for the first time. 

 It may interest the reader to know that it was in this book that 

 the Hard Maple and the Silver Maple were confused, and that 

 the confusion here started continued for more than a century. 



Marshall's Arbustuni Americanuni (1785) was the first 

 book ever written on American trees. In it are to be found the 

 original descriptions and names of many of our species. 



WHERE RARE BOOKS MAY BE FOUND. 



The rare books mentioned in this paper are found in many, 

 but by no means all of the botanical libraries in the country. If 

 the young forester finds himself near any considerable library 



