'404 



WEED FLORA OF lOWA 



Fig. 235-A. Distribution of Lygodesmia. 



yellowish juice; lower leaves rigid, linear-lanceolate, small, entire, 

 the upper scalelike; flowers purple in erect heads; achenes nar- 

 row-ribbed, pappus light brown. This weed is sometimes called 

 skeleton weed. 



Distribution. — This weed is common from Missouri river to west- 

 ern Montana and east to St. Croix river in Wisconsin. A some- 

 what troublesome weed in northwestern Iowa; easily recognized by 

 the yellowish juice and rushlike stems. 



Extermination. — This plant produces a long root which enables 

 the plant to spread rapidly. It also produces a large number of 

 "seeds." Where the weed is common, plough the field after 

 harvest and disk the plants. It is a good plan to follow up with 

 a hoe, cutting off the plants. 



