AMERICAN 
JOURNAL OF BOTANY 
Devoted to All Branches of Botanical Science 
Established 1914 
EDITED BY A COMMITTEE OF THE 
BOTANICAL SOCIETY OF AMERICA 
EDITORIAL COMMITTEE 
C. E. Allen, Editor-in-Chief, 
University of Wisconsin 
WILLIAM Crocker, . L. R. Jones, 
University of Chicago University of Wisconsin 
C. Stuart Gager, Business Manager Edgar W. Olive, 
Brooklyn Botanic Garden Brooklyn Botanic Garden 
R. A. Harper, - Jacob R. Schramm, 
Columbia University Cornell University 
C. L. Shear, Bureau of Plant Industry 
(Representing American PhytopathologiCal Society) 
The Journal is published monthly, except during August and September 
Subscription price, |6.oo a year. Single copies 70 cents, plus postage. Postage wil 
be charged to all foreign countries, except Mexico, Cuba, Porto Rico, Panama 
Canal Zone, Republic of Panama, Hawaii, Philippine Islands, Guam, Samoan 
Islands, and Shanghai. Postage to Canada 20 cents a volume on annual subscrip- 
tions ; to all other countries in the Postal Union, 40 cents a volume on annual sub- 
scriptions. 
The pages of the Journal are open to members of the Botanical Society of 
America, or to candidates approved for membership. 
Manuscript offered for publication should be typewritten, and should in all 
cases be subinitted to the Editor-in-Chief. 
Papers are limited to 2b pages in length, exclusive of plates, except that ad- 
ditional pages maybe arranged for at cost rate to authors (approximately $3.00 a 
page). 
Proofs should be corrected immediately on receipt, and returned to American 
Journal of Botany, Brooklyn Botanic Garden, Brooklyn, N. Y. 
Illustrations, other than zinc etchings, and tabular matter should, in general, 
be restricted to approximately ten percent of the number of pageb of text. Authors 
may be charged at cost rates for illustrations and tabular matter in excess ©f that 
amount (approximately $6.40 a page for tabular matter; 15 cents per square inch 
for half-tones). 
Separates should be ordered' when proof is returned. Fifty''copies without 
cover will be supplied free; cover and additional copies at cost. 
Remittances should be made payable to American Journal of Botany. Ten ceiits 
must'be a dded to aU'checks not drawn on New York City banks. 
Claims for missing numbers should be made within 55 days following their date 
of mailing. The publishers will supply missing numbers free only when they have 
been lost'in the mails. ' 
Correspondence concerning editorial matters should 'be addressed to Prof. C. E. 
Allen, University of Wisconsin, Madison, Wisconsin. 
Business correspondence, including notice of change of address, and directions 
concerning reprints, should be addressed to American Journal of Botany, Brook- 
lyn Botanic Garden, Brooklyn, N. Y., or 41 North Queen Street, Lancaster, Pa. 
