110 



logical relations of the forests of the state, as well as a very 

 serviceable treatise on the morphology of a tree with particular 

 reference to the use of the systematic part of the book. 



Part II, pages 53-223, is a "Manual of Pennsylvania Trees" 

 and comprises a discussion on the identification of trees and a 

 description of families, genera, and species, with accompanying 

 keys. For each of the 126 species treated there is a full-page 

 plate containing excellent line drawings of a shoot with flowers, 

 another with fruit, another in the winter condition, with a larger 

 figure of individual buds, and often other detail figures. The 

 page of text accompanying this plate treats of the species briefly 

 under the following heads: Form, Bark, Twigs, Buds, Leaves, 

 Leaf-scars, Flowers, Fruit, Wood, Distinguishing Characteristics, 

 Range, Distribution in Pennsylvania, Habitat, and Importance 

 of the Species. To the present reviewer this part of the book 

 deserves great praise. The typography is good, the proof-reading 

 has been carefully done, the nomenclature is that of Gray's 

 Manual (seventh edition). It is perhaps to be regretted that 

 the author uses a comma between the specific name and its 

 author. 



Under the heading "Distribution in Pennsylvania," however, 

 there is a lack of accuracy which to the 120 members of the 

 Botanical Society of Western Pennsylvania, and to the many 

 other amateur botanists and teachers in western Pennsylvania, 

 will cause considerable confusion. In the Pennsylvania Her- 

 barium of the Carnegie Museum there are now, thanks to the 

 activities of the Botanical Society and of the Museum and its 

 friends, about 50,000 specimens, representing more or less com- 

 pletely all of the counties of the western and many of those 

 of the central part of the state. There is a fair proportional 

 number of tree specimens among these and, inasmuch as Pro- 

 fessor Illick notes, in his preface, that "Special efforts are 

 being put forth to ascertain the distribution more accurately," 

 it may be of interest to note, as authenticated by specimens in 

 the Carnegie Museum, the following occurrences of trees in 

 western Pennsylvania outside of the range given for them in 

 Pennsylvania Trees: 



