PREFACE 



IN 1909 the authors published their "Key to 

 New England Trees" which was then regarded as 

 preliminary to an illustrated edition. Later it 

 was decided to extend the geographic range of the 

 forthcoming edition so as to include the north- 

 eastern states and adjacent Canada. 



This key is intended, as was the earlier one, to 

 serve as a guide for those who wish to become ac- 

 quainted with the wild and commonly cultivated 

 trees of the region indicated. At the same time 

 the book remains sufficiently small to be readily 

 carried in the pocket. For the convenience of 

 those who wish to learn more about the trees a 

 bibliography of some of the more important works 

 on the trees of northeastern America will be found 

 on page 157. The illustrations are intended to show 

 an outline of a typical leaf of every tree of which 

 the leaves differ sufficiently from others to be 

 recognized in a drawing-. Where the leaves of two 

 different trees are much. alike an outline of one 

 only is usually given, and an explanatory reference 

 is made to this under the species not illustrated, 

 at the proper place in the key. 



It must be borne in mind that no two leaves on 

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