THE PLANT WORLD 



A Monthly Journal of General Botany 



Established 1897 



Edited by 

 FORREST SHREVE 



Published by 

 THE PLANT WORLD ASSOCIATION 



Volume 22 



OFFICE OF PUBLICATION 



Mt. Royal and Guilford Aves. 

 baltimore, md. 



EDITORIAL OFFICE 



TUCSON, ARIZONA 



1919 



