ESTABLISHED 1897 



The 



PLANT WORLD 



An Illustrated Monthly Magazine 

 of General Botany 



Edited by 



VoivNEY M. Spalding 



Published by 



The Plant World Association 



Consisting of the following members: Joseph Charles Arthur, Purdue University; Otis 

 William Caldwell, University of Chicago; William Austin Cannon, Desert Laboratory; 

 Charles Stuart Gager, Universit y of Missouri; Burton Edward Livingston, Desert Lab 

 oratory; William Bennett McCallum, Arizona Experiment Station; Francis Ernest Lloyd 

 Alabama Polytechnic institute; Daniel Trembly MacDougal, Carnegie Institution of 

 Washington; George James Peirce, Stanford University; Charles Louis Pollard, Staten 

 Island Asso. of Arts and Sciences; Volney Morgan Spalding, Desert Laboratory; Forrest 

 Shreve, Desert Laboratory; John James Thornber, University of Arizona; and R. S. 

 Macintosh. Alabama Polytechnic Institute 



THE PLANT WOULD is devoted to the interests of the general reader the student 

 and teacher. It therefore seeks to present each month the results of the development 

 of botanical knowledge in the widest sense. 



Manuscripts for publication, hooks for review and business communications should 

 be sent to THE PL A XT WORLD. Tucson, Arizona. 



Subscription Si. 50 per year. Make paper payable to THE PLANT WORLD. 



Correspondence regarding Volumes I-VH (1897-1004) inclusive should be addressed 

 to Charles Louis Pollard, Xew Brighton, X. V. The remaining back numbers may be 

 obtained from THE PL A XT WORLD, Tucson, Arizona 



Authors who order extra copies, containing their articles, before the issue is printed 

 will receive these at the rate of S3. 00 per hundred; less than 25 at 6 cents apiece, postage 

 or express extra. If ordered after the issue is printed, a limited number of extra copies 

 can be furnished to authors at 10 cents apiece. Reprints ordered before the issue is printed 

 will be furnished at the rate of 35 cents per page, per hundred copies, not including covers 



THE PLANT WORLD 



Tucson, Arizona 



