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 Cbakles Arthur 



Purdue University 

 Otis William Caldwell 



Unlverelty of Chicago 

 WiLLiAU Austin Gannon 



Desert Laboratory 

 Charles Stuart Gager 



Brooklyn Botanic Garden 

 Burton Edward Livingston 



Johns Hopkins University 

 Francis Ernest Llotd 



McGUl University 

 Daniel Trembly MacDouoal 



Carnegie Institution of Washington 

 Edqar 



Jambs Bertram Overton 



University of Wisconsin 

 Georoe James Peircb 



Stanford University 

 Charles Louis Pollard 



Staten Island Association 

 Herbert Maulb Richards 



Columbia University 

 Forrest Shreve 



Desert Laboratory 

 Volnet Morgan Spaldinq 



Loma Linda, California 

 John James Thobnber 



University of Arizona 



Nelson 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 covbbb 



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 S2.50 per annum in the United States, its overseas 

 dependencies, and Canada and Mexico; $3.00 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 issue. 



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. 



