A8T&RALES. 



513 



red flowers, which are gathered and dried, constituting the dye Saf- 

 flower. 



Centaurea odoratu and C. moschata, from Asia, and other European 

 and American species, are cultivated in flower gardens. 



Cnicus includes our Thistles, most of which are weeds in fields. 



FIGS 442 5. ILLUSTRATIONS OF TARAXACUM DBNS-LEONIS. 



FIG. 442. 



FIG. 443. 



Fie. 445. 



ting head on the 



Fig. 442. Head of flowers, with a bud on the right, a closed f 

 left, and two leaves. 

 Eig. 443. Flower Magnified. Fig. 444. Receptacle and fruits. 



Fig. 445 Fruit. Magnified. 



C. arvensis, the so called Canada Thistle, is in reality an Old World 

 species. It is one of the most difficult of all our weeds to eradicate on 

 account of its underground stems, which are tenacious of life. 

 C'. lanceolatus, the Common Tiiistle, is another introduced speciea. 



