THE PLANT WORLD 



A Magazine of General Botany Largely Devoted to Plant Geography 

 and Explorations. Profusely Illustrated. 



fJThe September number con- 

 tains the following articles : 



The Course of the Vege- 

 tative Seasons in South- 

 ern Arizona. By Dr. D. 

 T. MacDougal. 



Methods of Reproduction 

 in Guayule (a Mexican 

 Rubber Plant) and Ma- 

 riola. By Professor F.E. 

 Lloyd. 



The Western Edge of the 

 Colorado Desert. By 

 Prof. V. M. Spalding. 



Bower's Origin of a Land 

 Flora. By Dr. W. A. 



MARGIN OF THE OASIS OF SONOYTA. Cannon. 



New subscribers remitting before December ] , 1 908, will 

 Sample copies on application. 



If Subscriptions, $ 1 .50 per year, 

 receive the November and December numbers free 



THE PLANT WORLD, TUCSON, ARIZONA 



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