RSE Lo ae ae 
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hii EaeE Tae ws: 
THE 
August 1908 
Editors: JOHN M. COULTER and CHARLES R. BARNES 
CONTENTS 
Floral Succession in the Prairie-Grass Formation of 
Southeastern South Dakota LeRoy Harris Harvey_ 
Undescribed Plants from Guatemala and Other Central - 
American Republics John Donnell Smith 
A Method for the Quantitative Determination ak 
Transpiration in Plants Geo. F.'Freeman 
The Toxic Property of Bog Water and Bog Soil 
Alfred Dachnowski 
Briefer Articles 
The Flowers of Washingtonia S.'B. Parish 
Current Literature 
The University of Chicago Press 
CHICAGO and NEW YORE 
William Wesley and Son, London 
