Vol. IV. 
DECEMBER, 1917 
No. 10 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
The phytogeography of Manoa Valley, Hawaiian Islands. 
Vaughan MacCaughey 561 - 
Revision of the Hawaiian species of the genus Gyrtandra, section Cylindro- 
calyces Hillebr. ; Joseph F. Rock 604 
On the distribution of abnormalities in the inflorescence of Spiraea Vanhouttei. 
J. Arthur Harris 624 
Index to Volume IV ..... , 637 
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 ii, 1914, at the post office at Lancaster, Pennsylvania, 
under the act of March 3, 1879. 
