MEDICINAL WEEDS OP IOWA 



775 



Fig. 569. Quack Grass (Agropyron repens). The root-stock used for bladder 



trouble. 

 (Drawing by Charlotte M. King.) 



The entire herb of water pepper (Polygonum hydropiper) when 

 decanted with alcohol forms a valuable diuretic, but is not recog- 

 nized in the Pharmacopoeia. 



The entire leafy part of the American wormseed (Chenopodium 

 ambrosioides) is valued for its anthelmintic properties. Oil from 

 the fruit is official and sells for $1.50 per pound. 



