Floristik etc. — Angewandte Botanik. 175 



stet in ihrer Beziehung zu den Pflanzen, die sonst auf ähnlichen 

 Standorten in diesen Gegenden vorkommen. 



Zum Schluss werden einige Beobachtungen über die Beziehun- 

 gen zwischen Alchemilla alpina L. und Sibbaldia procumbens L. 

 mitgeteilt. Grevillius (Kempen a. Rh.). 



Ashe, W. W., Loblolly or North Carolina Pine. (Bull. 24 



N. C. Geol. and Econ. Surv. Raleigh. XVI, 169 pp. 27 pl. 1915.) 



This bulletin describes the loblolly pine and how to identify 

 it. The economic Status of the tree is given with the commercial 

 geographic distributicMi. The ecologic portion deals with the tree 

 and its associated species, ihe forest characterislics, silvical requi- 

 rements, growth (with volume tables), management, Systems of 

 cuttings, protection from fire, methods of restocking and the wood 

 and its uses. Harshberger. 



Boerker, R. H., Some Notes on Forest Ecology and its 

 Problems (Proc. Soc. Amer. Foresters. X. N« 4. Oct. 1915.) 



The author first gives a definition and concept of forest ecology 

 with a consideration of the methods, scope and importance of 

 forest. He insists on the investigation of habitat factors and the 

 application of such data to natural and artificial reproduction. Em- 

 phasis is laid on the investigation of forest formations, the nature, 

 scope and result of silvical investigations with a valuable summary 

 of the Problems and factors concerned. Harshberger. 



Coville, F. V., Directions of Blueberry Culture, 1916. 

 (Bull. 334 U. S. Dept. Agric. Dec. 28, 1915. 16 pp 17 pl.) 



This bulletin details further experiments on blueberry culture. 

 It informs us that success rests on the presence of an acid soil and 

 the possession of a root fungus that appears to have the beneficial 

 function of supplying the plants with nitrogen. The bulletin dis- 

 cusses propagation (stumping, soil mixtures, tubering, winter cut- 

 tings, root cuttings, treatment ofyoung plants), field planting, yields 

 and Profits. Harshberger. 



Harper, R. M., An Inventory of Florida 's Forestsandthe 

 Outlook for the Futur e. (Quart. Bull. Fla-Dept, Agric. June 

 1916.) 



This is an account of the area and density of the forests, their 

 distribution and character followed by reference to forest fires, a 

 list of 46 commonest trees, their rate of growth and consumption 

 with a resum(5 of prophecies regarding forests. Harshberger. 



Happer, R. M., Is Forestry a Science? (Torreya. XVI. p. 

 136—139. June 1916.) 



This is a short review of the views pro and con,as to whether 

 forestry is a science. The author believes that forestry and „plant 

 sociology" are synonymous terms. Plant sociology, as a science, has 

 not been developed by foresters alone, but by ecologists very largely. 



Harshberger. 



