142 



THE SECOND BOOK OF BOTANY. 



SCALES. The bracts forming the involucre of a 

 flower-head. 



FLORETS. The flowers of a flower-head. 



KAY FLORETS. The outer petal-like florets of a 

 flower-head. 



DISK FLORETS. The inner florets of a flower- 

 head. 



Observe the bract at the base of the floret in Fig. 

 297. Observe the chaffy, bract-like bodies growing 

 among the florets in Fig. 296. Examine your speci- 

 mens, and see if, in any case, you find such things 

 growing out of the receptacle among the florets. 



FIG. 296. 



FIG 297. 



FIG. 298. 



These chaffy bodies are kn,own as palece. When 

 they are wanting, the receptacle is said to be naked. 

 Separate the naked from the chaffy flower-heads of 

 your collection. 



In Fig. 298 you see the convex receptacle at a. 

 Observe the different forms presented by the recep- 



