LETTIiR OF TRANSMITTAL. 



U. S. Department of Agriculttjre, 



Bureau of Plant Industry, 



Office of the Chief, 

 Washington, D. C, April 15, 1911. 

 Sir: I have the honor to transmit herewith and to recommend for 

 pubhcation as Bulletin No. 219 of the series of this Bureau the accom- 

 panying manuscript, entitled "American Medicinal Leaves and 

 Herbs." This paper was prepared by Miss Alice Henkel, Assistant 

 in Drug-Plant Investigations, and has been submitted by the Physiolo- 

 gist in charge with a view to its publication. 



Thirty-six plants furnishing leaves and herbs for medicinal use 

 are fully described, and in some instances brief descriptions of related 

 species are included therewith. Of the above number, 15 are official 

 in the United States Pharmacopoeia. 



This bulletin forms the third installment on the subject of American 

 medicinal plants and has been prepared to meet the steady demand 

 for information of this character. It is intended as a guide and refer- 

 ence book for those who may be interested in the study or collection 

 of the medicinal plants of this country. The first bulletin of this 

 series treats of American root drugs, and the second of American 

 medicinal barks. 



Respectfully, Wm. A. Taylor, 



Acting Chief of Bureau . 

 Hon. James Wilson, 



Secretary of Agriculture. 



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