A Journal of General Botany 



VOLUME 2 2 



NUMBER 12 



DECEMBER, 1919 



CONTAINING 



The Geological History of the Sweet Gum and Witch Hazel. Edward W. 

 Berry 345 



Shore Vegetation of Flathead Lake, Montana. Gertrude P. Norton 355 



Books and Current Literature 363 



Notes and a Comment 366 



PUBLISHED MONTHLY 



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 baltimore, md. 



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Entered aa Beeond-claen matter March 9, 1912, at the post office at Baltimore, Maryland, under the act of July 16, 1804 



