Vol. VI. 
FEBRUARY, 1919 
No. 2 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMEl^ICA 
CONTENTS 
Crytandreae Hawaiienses, Sections Schizocalyces Hillebr. and Chaetocalyces 
Hillebr.. .Joseph F. Rock 47 
The ecologic foliar anatomy of some plants of a prairie province in central 
Iowa. Ada Hayden 69 
FEB 28 1919 ' 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THE 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa. 
Entered as second-class matter February 21, 1914, at the post office at Lancaster, Pennsylvania, 
under the act of March 3,1 879 
