Periodical Literature. loi 



by the province even though only the poorer and more inacces- 

 sible sites have been set aside for this purpose. 



The three main types of forest are those in which pine is the 

 predominant species, the spruce types, and a mixed hardwood 

 type. The author subdivides the pine types into three main sub 

 types with site classes in each. There are only two important 

 spruce types. 



The principal timber trees comprise no different species, 

 among which pine, spruce, oak, elm, basswood and boxwood are 

 the most important commercially. 



Satisfactory reproduction can be secured whenever proper at- 

 tention is paid to the light requirements of the species to be re- 

 generated and the seedlings do not have too much competition 

 from grass and weeds. 



The report from which this article was prepared was made 

 for the Imperial Russian Forest Institute in 19 13 by a forester 

 especially delegated for this jjurpose. It is to form the basis 

 for the future forest policy for Transcaucasia. 



K. W. W. 



Aus Russland. Forstwissenschaftliches Centralblatt, Dec, 1913. Pp. 

 651-657- 



BOTANY AND ZOOLOGY. 



The range of Polyponis dryadeus is 

 Root Parasite probably co-extensive with that of the oak 

 of in Europe and America. Many species of 



Oak. both red and white oaks are known to be 



susceptible. The virulence of the parasite 

 does not seem to be very great, as vigorous trees usually with- 

 stand attack. A white mottled sap rot of the roots is produced 

 which later involves the heartwood, but which does not extend up 

 into the trunk beyond the soil line. It is here, at the surface of 

 the soil, that the fruiting bodies are formed. The study is of 

 interest because it adds to our meager knowledge of root di- 

 seases, and because it establishes the fact that the stem heart rot 

 ascribed by Hartig to P. dryadeus is due to an entirely different 

 fungus, namely P. dryophilus. J. Mj; F. 



Journal of Ayricultural Research, Department of Agriculture, Vol. J, 

 No. 3, 1913, pp. 239-248. 



