Teachers' Leaflet. 



471 



Observation. — The central circular part or 

 disc of the flower is composed of a great many 

 tiny, tubular flowers standing very closely to- 

 gether. Take one of these out, place under a lens 

 to show that it has stamens, a pistil and a corolla 

 that is tube-like. Compare this little floret with 

 any large flower with tubular corolla, like the 

 morning-glory, harebell or gentian. Let the 

 pupil study it until he sees that it is a perfect 

 flower. 



Next take off one of the ray flowers and show that its corolla 

 instead of being lobed like the others is extended out at one side in a 

 banner. Under the lens see if this flower produces a seed. 



Central Uoiver ai:d banner 

 flower of the ox-eye. 



A COMPOSITE FLOWER. 



the work of a flower family. 



Purpose. — To acquaint the pupil with the different duties of the 

 banner flowers and the center flowers. 



After these two types of the flower have been studied show the 

 work of each in the flower family. The business of the central, perfect 

 flowers is to develop seeds, each one producing one seed; the work of 

 the banner flowers around the edges is to wave their banners to attract 

 the insects, say as plainly as any flag signal can say, " Come right this 

 way and get some pollen." Usually most of these flowers have no 



Burdock. 



Aster White Daisy. 



Enlarged drazvings of the ilorvcrs. 



Thistle. 



nectar but attract insects by the pollen. The banner flowers are the 

 advertising agents for the whole family, for if they did not hang out 



