268 BOOKS AND CURRENT LITERATURE 



much discussed question of association and formation. The last chap- 

 ter presents his classification of 13 vegetation types, under each of which 

 examples are given. 



The fourth section is devoted to matters of evolutionary interest 

 and is headed ecologic epharmony and phylogeny. The several divi- 

 sions of this part of the book treat of phylogeny and growth forms (life 

 forms,) eurychory and stenochory, the behavior of closely related races 

 in the struggle for space, the behavior of representative species of a 

 eurychoric genus, the generic coefficient, evolution of new forms by 

 correllation, epharmony, species mutation, and present day theories 

 of heredity. The third chapter of this section deals with an extension 

 of the migration hypothesis of Moritz Wagner, that specifically rich 

 genera colonize different formations with different species. Drude 

 holds that closely allied races of a species either grow in separate areas 

 or are heterochoric, i.e. grow in different ecologic habitats within the 

 same area. The fourth chapter, on the behavior of representatives 

 of eurychoric genera, which are equivalent ecologically but are found 

 in different geographic areas, is illustrated by a number of such cases 

 as are afforded by Asarum, Monotropa and Larix. In conclusion Pro- 

 fessor Drude discusses the scope of ecology and enunciates his philos- 

 ophy, which appears to be a blending of Neo-Lamarckianism and Dar- 

 ■\vinism. 



Ecologists the world over will be indebted to Professor Drude for a 

 lucid exposition of some of the most important principles of plant ecology 

 philosophically considered. He has presented many old facts in a new 

 form, and many new facts, which he has worked out in a study of the 

 vegetation of the globe. The book is well printed and systematically 

 arranged. The figures are good and many of them new, representing 

 typic species as grown in the Dresden Botanic Garden — JohnW. 

 Harshberger. 



Physiological Anatomy — Three German echtions of Haberlandt's 

 well-known Physiological Plant Anatomy have been issued since the 

 original one of 1884. From the last of these an English translation 

 has just been made by Mr. Montagu Drummond, of the University of 

 Glasgow.^ The famihar features of the third German edition (1904) 

 have been retained in respect of the subdivisions of the subject matter, 



' Haberlandt, G. Physiological Plant Anatomy. Translated by Montagu 

 Drummond. 778 pp., 291 figs. London, MacmiUan and Company. 1914 ($6.50). 



