U. S. DEPARTMENT OF AGRICULTURp:. 



BUREAU OF PLANT INDUSTRY- BULLETIN NO. 107. 



B. T. GALLOWAY, Chi^of Bureau. 



AMERICAN ROOT DRUGS. 



^'fiRA^ 



BY 



ALICE HEXKEL. '^'^^ 





^L 



Assistant, Drug-Plant Investigations. 



ISSTJED OfTOBFR 25. 1007. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 

 1907. 



