PREFACE. 



In connection with the work of Drug--Plant Investigations many 

 inquiries are receiv^ed from various parts of the country asking for a 

 list of the drug-producing plants of the regions concerned and for 

 information as to the parts of the plants used in medicine, etc. It 

 being- impossible to comply with requests of this nature in any satis- 

 factor}" way. Miss Henkel was asked to compile a list of the drug 

 plants of this country, using- as a basis the catalogues of dealers in 

 crude drugs and the standard works on S3^stematic botan3^ It has 

 seemed from an inspection of these lists and of much current phar- 

 maceutical literature that the recent changes in botanical nomenclature 

 have succeeded one another too rapidly to permit the drug dealer and 

 the pharmacist to keep pace with them. This has resulted in consider- 

 able confusion in regard to botanical names, and in some cases in the 

 matter of the common names of drug-producing plants. In such a 

 list as that herewith presented the opportunity for helping- to clear up 

 this situation has seemed worth improving. The recent appearance 

 of the new Pharmacopteia, in which the botanical nomenclature has 

 been revised, has seemed to emphasize the desirability of making this 

 attempt, since the names in the case of official plants will be fairly 

 definitely fixed among- pharmacists for the next ten years. In the 

 accompanying list the pharmacopceial names are given and a revision 

 of the nomenclature of the unofticial drugs is also presented. Mr. 

 Frederick V. Coville, Hotanist, has kindly revised the botanical names 

 used in this publication. 



It is hoped that this compilation will tend to unify usage among 

 those who have to do with crude di-ugs and drug plants. 



Rodney H, Truk, 



Phy.t!olo<//sf III Charge 



Office of Drucx-Plant Investkiations, 



\yaHh'i,uji(>n, I). ('., Octohir m^ WUo. 



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