ORGANS OF REPRODUCTION. 



191 



^fWM 



Cliamomile,Daisy,&c., Fig. 376. 



and in some allied or- 

 ders, a somewhat si- 

 milar arrangement of 

 bracts takes place, and 

 the name of involu- 

 cre is also applied to 

 them. In tliese cases 

 there are frequently 

 two or three rows 

 of bracts overlapping 

 each other. The bracts 

 thus forming the in- 

 volucre of Composite 

 flowers have been term- 

 ed phyllaries. Some- 

 times the bracts of an 

 involucre grow toge- 

 ther at their base, 

 and form ultimately a 

 sort of cup-shaped 

 body surrounding the 

 fruit, as the cup of the 

 Acorn {fig. Z11), and 

 the husk of the Filbert or Hazel-nut (Jig. 378); they then form 

 what is called a cupule. 



Fig. 377. 



Fig. 376. Capitulum of Marygold (Calen- 

 dula), showing the flowers enclosed in 

 an involucre. 



Fig. 377. Fruit of the Oak {Quercus pedunculata) surrounded by a cupule, 



Fig. 378. Fruit of the Hazel iCorylus Avellana) with cupule at the 



base. 



