i 



A Magazine of General Botany 



VOLUME18 i£ 



NUMBER 10 

 OCTOBER, 1915 



CONTAINING 



Acid Accumulation and Destruction in Large Succulents. 



Esmond R. Long 261 



A Study of the Root-Systems of Prairie Plants of Southeastern Washing- 

 ton. II. 

 John Ernst Weaver 273 



Books and Current Literature 293 



Notes and Comment 294 



PUBLISHED MONTHLY 



OFFICE OF PUBLICATION 



2419-21 Greenmotjnt 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, 1894 



