74 



Forty-seven line drawings illustrate terms. These drawings are 

 of plants described in the key and thus serve a double purpose. 

 There is a short "general" key which leads to many special 

 keys. Over 600 species of trees are worked out in these keys. 



In using the book it is very easy to go astray as one must 

 be sure he understands just what each term means. The use 

 of the sizes of leaves or leaflets is rather dangerous as these 

 vary so greatly. Leaves from various parts of a tree or shrub 

 are necessary in many cases. 



There are some exotics omitted and the book is bound to 

 be out of date as soon as published, since new plants are being 

 introduced every day. However, it is a step in the right direc- 

 tion. Use will bring out its good and its bad points. 



Julius M. Johnson 



