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BOTANICAL 



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EDITORS: 



JOHN MERLE COULTER and CHARLES REID BARNES, 



WITH OTHER MEMBERS OF THE BOTANICAL STAFF 



OF THE UNIVERSITY OF CHICAGO 



ASSOCIATE EDITORS: 



J. C. Arthur, 



Purdue University, 



Casimir DeCandolle, 



Geneva, 



J. B, DeToni, 



University of Padua. 



Adolf Engler, 



University of Berlin, 



LiON GUIGNARD, 



L'EcoIe de Pharmacia. 



Robert A. Harper, 



University of Wisconsin. 



JiNzo Matsumura, 



Imperial University, Tokyo. 



Fritz Noll, 



University of Bonn, 



VoLNEY M. Spalding, 



University of Michigan. 



Roland Thaxter, 



Harvard University. 



William Trelease, 



Missouri Botanical Garden, 



H. Marshall Ward, 



University of Cambridge. 



EuGEN. Warming, 



University of Copenhagen. 



Veit Wittrock, 



Royal Academy of Sciences, 

 Stockholm. 



volume XXXV 



JANUARY— JUNE, 1903 



WITH SEVENTEEN PLATES AND THIRTY-FOUR FIGURES IN THE TEXT 



CHICAGO, ILLINOIS 



PUBLISHED BY THE UNIVERSITY OF CHICAGO 



1903 





