REINFORCED FRUITS 



283 



the fruit, but they continue to be comparatively 

 small, and remain upon the tree when the fruit is 

 picked. 



332a. Since the cocoa-nut is a dry indehiscent 1 -seeded fruit, 

 it might be likened to a gigantic akene. Structurally, however, it is 

 more like a drupe, for the fibrous husk is formed from the outer 

 part of the pericarp (or exooarp, 300), and 

 the hard shell enclosing the meat is the . . ^ 



inner part of the pericarp, or endocarp. Palm 

 pistils are 3-earpelled, and in the cocoa- 



nut tribe each carpel is 1-ovuled. The marks of the three 

 carpels may be seen on the ripe nut, but only one ovule de- 

 velops into a seed (408a). 



333. In all the above instances, it is plain that 

 the reinforcing structure is the perianth, usually 

 a calyx. If the pupil will diligently examine the 

 fruits of common herbs and bushes and trees, 

 he will soon find that a persistent calyx is fre- 

 quent. 



