The Plant World 



A Monthly Magazine of General Botany 



Established 1897 



Edited by 



Forrest Shreve 



Published by 



The Plant World Association 



COMPOSED OF THE FOLLOWING MEMBERS: 

 Joseph Charles Arthur James Bebtrau Oterton 



Purdue University UnlTersItjr of Wisconsin 



Otis William Caldtveix Gbobge James Peihcb 



University of Chicago Stanford University 



William AtrsTiN Cannon Charles Loms Pollard 



Desert Laboratory Staten Island Aasoolntlon 



Charles Stuart Gaqbr Herbert Maulb Richards 



Brooklyn Botanic Garden Columbia University 



Burton Edward Livingston Forrest Shrevb 



Johns Hopkins University Desert Laboratory 



Francis Ernest Llotd Volnet Morgan Spalding 



McGlll University Loma Linda, California 



Daniel Tbemblt MacDocoal John James Tbobnber 



Carnegie Institution ot Washington University of Arizona 



Edgab Nevson Transeau 



Eastern Illinois Normal School 



All manuscripts submitted for publication should be type-written and in good 

 order. Galley proof is submitted to the author, who should return it as early as 

 possible to the Editor. Reprints should be ordered on a blank for that purpose 

 which accompanies the galley proofs. 



Reprints will be supplied at the following rates: 





without covers 



with covers 



First 100 



Additional 100 



First 100 



Additional 100 





$2.68 



$0.72 



$4.68 



$1.72 





4.32 



1.20 



6.32 



2.20 





4.80 



2.00 



6.80 



3.00 



Express or postage is extra. 



Advertising rates will be furnished on application. 



Address all correspondence regarding contributions and reprints, and all 

 books for review to The Editor, The Plant World, Tucson, Arizona. 



The subscription price is $2.50 per annum in the United States, its overseas 

 dependencies, and Canada and Mexico; S3. 00 to other countries. Single copies 

 less than twelve months old, 20 cents; single copies more than twelve months old, 

 30 cents. Volumes 8 to 14 inclusive can be supplied at $2.00 each, carriage paid. 



Missing numbers lost in the mails will be replaced gratis only when notice 

 is received within one month of date of ispue. 



Make all remittances payable to The Plant World. Address all correspond- 

 ence regarding subscriptions, discontinuances, changes of address, back num- 

 bers and early volumes to: The Waverly Press, 2419-21 York Road, Baltimore, 

 Md., or to The Plant World, Tucson, Arizona. 



