"^^/C^lc^ 



CONTAININO 



The Interpretation and Application of Certain Terms and Concepts in 

 the Ecological Classification of Plant Communities 



George E. Nichols 341 



Comparative Length of Growing Season of Ring-Porous and Diffuse-Por- 

 ous Woods 



Ferdinand W. Haasis 354 



Books and Current Literature 357 



Notes and Comment 364 



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' baltimore, md, 



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Entered as second-class matter March 9, 1912, at the post office at Baltimore, Maryland, under the act of July 16, 1894 



