ESTABLISHED 1S97 



The 



PLANT WORLD 



An Illustrated Monthly Magazine 

 of General Botany 



Edited by 



Volney 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, University of Missouri; Burton Edward Livingston, Desert Lab- 

 oratory; William Bennett McCallum, Arizona Experiment Station; Francis Er e-t ! loyd 

 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 WORLD 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 sen-e 



Manuscripts for publication, books for review and business communications should 

 be sent to THE PLANT WORLD. Tucsen, Arizona. 



Subscription $1.50 per year Make paper payable to THE PLANT WORLD. 



Correspondence regarding Volumes I- VII (18°7-1904) inclusive should be addressed 

 to Charles Louis Pollard, New Brighton, N. V. The remaining back numbers may be 

 obtained from THE PLANT W *RLD, Tucson. Arizona. 



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

 will receive these at the rate of £5.00 per hundred; less than 25 at 6 cents apiece, postage 

 or express extra. If or lered fter the i^sue is printed, a limited number of extra copies 

 can be furnished to authors at in 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 



