C^irrent Literature 117 



fruits, etc. , which have been chosen by systematists as useful in 

 accepted schemes of classification, but also of those features of 

 buds, twigs, leaves, seeds, seedlings, etc., which are necessarily 

 absent from the typical Flora, although they are employed in 

 special Floras and hand-books used by experts. ' ' 



In these days when it is expected that a well-trained forester 

 can recognize every twig in the forest, such a work is invaluable 

 to students of forest botany both in England and America. 

 However, since only a few of the species in the special part are 

 American, this half of the work is better adapted to English 

 students, although valuable to us in containing many of our 

 cultivated species. 



Aside from this practical value, however, a far more important 

 result of such a publication is the stimulus which it will inevi- 

 tably produce to a purely scientific study of the permanent char- 

 acters of our own woody plants, a field which with us has suffered 

 considerable neglect. A. H. G. 



Fremdliindische Wald laid Parkbdtinie fur Europa. Von Hein- 

 rich Mayr. P. Parey, Berlin, 1906, 623 pp. 612 fig. Price 26.4 k. 



For more than a quarter of a century Prof. Mayr has been 

 a close student of the trees of the northern hemisphere. In 1885 

 he travelled extensively through the forests of the United 

 States and later published the results of his observations in a 

 volume well known to American foresters, viz.. Die Waldungen 

 von Nordamerika. From North America Professor Mayr went 

 to Japan, China, Java and India. Since these earlier explora- 

 tions he has traveled extensively through nearly all of the other 

 important forest regions of the northern hemisphere. Professor 

 Mayr's extensive travels, together with his association for 25 

 years with the eminent forest botanist. Dr. Robert Hartig, has 

 peculiarly well fitted him to write with authority on exotic trees 

 suitable for forest and park use in Europe. 



About one-fourth of the volume is taken up with a description 

 of the exotic forest and park trees cultivated in Europe as they 

 appear in their natural habitat. Prof. Mayr points out that 

 these trees naturally occur widely distributed over the northern 

 hemisphere. This section of the book is, therefore, very largely 

 descriptive of the important forest regions of North America, 

 Europe, and Asia. The forest regions of North America from 

 which Europe obtains exotic species are divided into the Atlantic, 



