386 



WEED FLORA OF IOWA 



Fig. 225-A. Distribution of Chicory. 



Dandelion (Taraxacum officinale Weber). 

 Description. — A smooth, or at first pubescent, biennial or per- 

 ennial ; the many-flowered head borne on a slender hollow scape ; 

 root leaves pinnatifid or runcinate ; involucre double, the outer of 



Fig. 226. Dandelion {Taraxacum officinale). Long root, sometimes to a depth 



of three and cne-half feet in the soil. 



( Photographed by Gardner.) 



