-,\CAl^ 



A Journal of General Botany 



VOLUME 20 

 NUMBER 12 

 DECEMBER, 1917 



COPfTAINING 



The Pentose Sugars in Plant Metabolism 



H. A. Spoehr 365 



The Vegetation of Conglomerate Rocks of the Cincinnati Region 



E. Lucy Braun - " 380 



Books and Current Literature ' 393 



Notes and Comment 396 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 



2419-21 Greenmount Ave. 

 baltimore, md. 



EDITORIAL OFFICE 



TUCSON, ARIZONA 



Entered as second-class matter March 9, 1912, at the post office at Baltimore, Maryland, under the act of July 16, 1694 



