i 



Botanical Abstracts 



A monthly serial furnishing abstracts and citations of publications in the international 



field of botany in its broadest sense. 



VOLUME IX 

 AUGUST, 1921-OCTOBER, 1921 



PUBLISHED MONTHLT UNDER THE DIRECTION OF 



THE BOARD OF CONTROL OF BOTANICAL ABSTRACTS, INC. 



A democratically constituted organization, u-ith members representing many societies 



interested in plants. 



BALTIMORE, U. S. A. 



WILLIAMS & WILKIXS COMPANY 



1921 



