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 
F. C. Newcombe, Editor-in-Chief, 
University of Michigan 
C. Stuart Gager, Business Manager A. S. Hitchcock, 
Brooklyn Botanic Garden Bureau of Plant Industry 
Irving W. Bailey, L. R. Jones, 
Bussey Institution University of Wisconsin 
H. H. Bartlett Edgar W. Olive, 
Bureau of Plant Industry Brooklyn Botanic Garden 
The Journal is published monthly, except during August and September. The 
subscription price is $3.00 a year to members of the Botanical Society of America; 
to all others $4.00, Single copies 50 cents, plus postage. Postage will 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 subscriptions ; to all 
other countries in the Postal Union, 40 cents a volume on annual subscriptions. 
Manuscript offered for publication should be typewritten, and proof submitted 
to authors should be returned as soon as possible to American Journal of Botany, 
Brooklyn Botanic Garden, Brooklyn, N. Y. 
Illustrations will in general be limited to one full page, or its equivalent, for each 
ten pages of text. 
Separates shouid.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 
cents must be added to all checks not drawn on New York City banks. 
Claims for missing numbers should be made within 30 days following their 
date of maiHng. 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 . F. 
C. Newcombe, 9 Geddes Heights, Ann Arbor, Mich. 
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, Ni Y., or4i North Queen Street, Lancaster, Pa. 
