U. S. DEPARTMENT OF AGRICUL PURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 107. 



B. T. GALLOWAY, Chi^ qf Bureau. 



AMERICAN ROOT DRUGS. 



BV 



ALU'K llENKEL. 

 Assistant. Drihi-Plant Investiuations. 



Issued October 25, 1907. 



WASHIKCtTON: 

 government printing office 



19 07. 



