OEGANS OF REPEODUCTION. 



183 



Fig. 373. 



the cup of the Acorn 

 {fig. 374), and the 

 husk of the Filbert or 

 Hazel-nut {fig. 375) ; 

 they then form what is 

 called a cupule. 



When a bract is of 

 large size and sheath- 

 ing, and surrounds one, 

 or a number of flowers, 

 so as to completely 

 enclose them when in 

 a yoimg state, as in 

 the Iris, Narcissus, 

 Snow-flake {fig. 376), 

 the common Arum or 

 Cuckow-pint(/_9'. 377), 

 and Palms {fig. 391), 

 it is called a spathe. 

 The spathe is generally 

 found surrounding the 

 kind of inflorescence 

 called a spadix, (see 

 page 191), as in the 

 Arum, {fig, 377), and Palm {fig. 391); and it is also very com- 

 mon in other Monocotyledonous plants. The spathe may be 



Fig. 373. Capitulum of Marygold (Calen- 

 dula), sliowing the flowers enclosed in 

 an involucre. 



Fig. 374. 



Fig. 375. 



Fig. 374. Fruit of the Oak (Querciis pedunculata') surrounded by a cupule. 

 Fig. 375. Fruit of the Hazel (jCorylus Avellana) with cupule at the 



