To the many botanists and collectors who have aided in the prepa- 

 ration of this catalog during the past five years, the author wishes to 

 express his hearty thanks. It is hoped that all who take an interest 

 in Ohio plants will continue to send collections and rare specimens to 

 the State Herbarium. In this way alone can a truly great collection 

 be accumulated. 



J. H. SCHAFFNER, 

 Department of Botany, The Ohio State University. 

 January 1, 1914. 



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