WORLD BOOK COMPANY 



THE HOUSE OF APPLIED KNOWLEDGE 

 Established 1905 by Caspar W. Hodgson 



YONKERS-ON-HUDSON, NeW YORK 



2126 Prairie Avenue, Chicago 



The advance of botany has caused the de- 

 velopment of several distinct branches of 

 the subject — taxonomy, morphology, physi- 

 ology, ecology, plant geography, genetics. 

 As a consequence, the older first courses in 

 botany are no longer general but special, 

 covering only parts of the course. Editor 

 and publishers offer General Botany as a gen- 

 eral introductory text. They believe that this 

 is a general botany in fact as well as in name 



NWSS : TGB-2 



Copyright 1923 by World Book Company 

 Copyright in Great Britain 



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PRINTED IN U.S.A. 



