i8o 



AGRICULTURAL BOTANY 



of the flowering plants of the world are included in this 

 great family. Conspicuous among them are the asters, 

 the goldenrods, the sunflowers, the dandelions, and the 

 thistles. The most useful plants of this family are the 

 lettuce, salsify, chicory, saffron, and the plant the pul- 

 verized heads of which furnish the Persian insect powder. 



FIG. gi. Dandelion. 



I, a single flower; 2, stamens; 3, the receptacle and involucre; 4, a fruit; 5, a fruit with 



its pappus. 



