﻿I40 BOTANICAL GAZETTE [February 



French forests- 



A VERY CAREFUL and thorough discussion of the forests of France has 

 come from MM, Boppe and Joylet of the national school of forestry at 

 Nancy.=' The work begins with a discussion of the form and reproduction of 

 a tree as influenced by its environment, followed by descriptions of the 

 principal native species, in which the habitat, distribution, and forest value 

 of each are given. Then follows a detailed treatment of the forest-stand, the 

 influence of its trees upon the soil and upon each other. An aggregation of 

 stands makes a forest. As concerns forests, the climate of France falls into 

 two great divisions: (i)that of the plains, subdivided into three zones accord- 

 ing to the distribution of the rainfall and the resultant forest growth ; and 

 (2) that of the mountains, the climate of each mountain system being treated 

 separately. 



The greater part of the book is devoted to a detailed discussion of the 

 methods and principles of sylviculture as employed in France. Of special 

 economic interest is the account of the reforestation of denuded mountain 

 slopes and of the fixation of sand dunes. 



In the treatment of the forests in their biological and sylvicultural rela- 

 tions this book covers the ground more thoroughly than any American 

 treatise on a similar subject. — C. D. Howe. 



MINOR NOTICES. 



Alice R. Northrop ^ has published an account of the flora of two of 

 the Bahama islands, with an enumeration of the plants collected by John I. 

 Northrop and herself in 1890, a collection including 542 species. After some 

 description of the general ecological features of the region, the list of plants 

 is given. Several new species from the collection had previously been 

 described by various authors, and the present publication contains additional 

 new species, and also two new genera of palms {Pauroiis and Cyclospathe), 

 described by O. F. Cook. Following the list is a study of the relations of 

 the Bahama flora, as illustrated by the collection of the author. Of the 453 

 native vascular plants found on New Providence and Andros, 176 are 

 reported from other islands of the group, 335 from Cuba, 250 from southern 

 Florida, 108 from southern United States, 286 from Jamaica, 190 from Virgin 

 islands, 223 from Windward islands, T96 from Mexico and Central Mexico, 

 and 199 from South America. — J. M. C. 



NOTES FOR STUDENTS. 



Hunger'* has studied the granules which occur in the thallus of Dic- 

 tyota. He finds that the smaller ones near the plastids are of a monosac- 



= BoFPE. L., and Joylet, Ant., Les forets, traite pratique de sylviculture, pp. 

 xi -j- 488. 95 photogravures. Paris : J. B. BailHere & fils. 1901. 



3 Northrop, Alice R., Flora of New Providence and Andros (Bahama islands). 

 Meni. Torr. Bot. Club 12 : 1-98. ph, i~-ig. 1902. 



^Hunger, F. W. T., Ueber das Assimilations-Product derDictyotaceen. Jabrb. 

 \yiss. Bot. 38:70-82. 1902. 



