The 



Plant World 



j\ Magazine of General Botany 



VOLUME 12 

 NUMBER 2 

 FEB. 190 9 



Containing' 



Some Mexican Fiber Plants 



By J. E. Kirkwood 25 



Bogs, Their Nature and Origin 



By J. W Harshberger 34 



Present Problems of Physiological Plant Ecology 



By B. E. Livingston 41 



Notes and Comment 4 7 



Tucson, Arizona 



Entered as Second Class Matter, Dec 17, 1907 , at the Post-Office, Tucson, 

 Arizona, under the Act of Congress of March 3, 1879. 



