6§Tc^f 





To 

 ELMER DREW MERRILL 



Correspondent, administrator, bibliographer, explorer, 

 teacher, author, adviser, botanist extraordinary and 

 friend to scores of workers in the systematic botany 

 of the Far East, without whose correspondence and 

 tutelage this work would not have been undertaken, 

 and whose assistance and wise counsel have greatly 

 extended and increased its prospective usefulness, this 

 book is respectfully dedicated. 





V =0, 



