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i 



THE 





BOTANICAL 



GAZETTE 











■ ' 



EDITOR 

 JOHN MERLE COULTER 



VOLUME LXIX 



\ 



JANUARY-JUNE 1920 



WITH TWENTY-THREE PLATES AND 



HUNDRED NINETY-FOUR FIGURES 





« 



THE UNIV 



PRESS 



<i. 



\ 



