72 



CIVIC BIOLOGY 



the United States. The table l below gives the amounts brought 

 in and the prices we pay for some of our most common weeds. 



While the demand for medicinal weeds is not great, market- 

 ing those that have useful properties would tend to check their 

 spread, and might, in turn, pay at least for their removal. 



Other native drug plants. Clearing of the forests and the 

 work of the drug collector have resulted in almost extermi- 

 nating many of our native drug plants. To save these the 

 Bureau of Plant Industry has undertaken the work of domes- 

 ticating them with the hope not only of supplying the home 

 market but also of exporting them. 



In the gardens at Washington some success in an experi- 

 mental way has been attained in raising goldenseal, cascara 



1 Compiled from Bulletin No. 188, United States Department of Agricul- 

 ture, "Weeds used in Medicine." This gives prices and methods of pre- 

 paring for market. 



