7 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION 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 U.niversity of Wisconsin 
H. H. Bartlett, Edgar W. Olive, 
University of Michigan Brooklyn Botanic Garden 
VOLUME II 1915 
WITH EIGHTEEN PLATES AND NINETY TEXT FIGURES 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa. 
