SEED-BEARING PLANTS 



487 



The calyx tube is united to the one-celled ovary, and 

 its upper free part, or limb, is dififerentiated into hairs 

 {pappus), scales, teeth, or is merely cup-shaped, or in some 



Fig. 372. — Chicory {Cichoriiim Intyhus). A, portion of flowering 

 branch; B, basal leaf (runcinate-pinnatifid) ; C, median longitudinal section 

 through a head, showing the insertion of the flowers; D, individual flower; 

 E, fruit (ripened ovary), showing the persistent pappus (calyx) of short 

 scales. 



species entirely wanting. When the fruit is ripe, the 

 pappus aids in its dissemination by the wind. 



While the style is growing up through the tube of anthers 

 the stigmatic surfaces are in contact with each other, and 



