THE PISTIL. 



109 



three layers epicarp, mesocarp, and endocarp. Describe 

 the layers that make up the fruit ; that is, sayVhether, in 

 each case, the layer is pulpy, woody, stony, membranous, 

 leathery, etc. 



Preserve your collection for further study, and 

 add to it all you can get. 



EXERCISE L. 

 The Classification of Fruit. 



Look over your collection and separate the dehiscent 

 from the indehiscent fruits. The indehiscent group may 

 now be further separated into juicy fruits and dry fruits. 

 Compare your specimens of juicy fruit, one by one, with 

 the following pictures and definitions of fruits. The first 

 picture is that of a berry ; so you may first find the berries 

 of your collection. To determine whether a particular 

 fruit is a berry or not, cut it across, and see if it agrees in 

 structure with Fig. 335, and the requirements of the defi- 

 nition. Never mind whether your conclusion accords 

 with common speech or not ; whether a strawberry turns 

 out to be a berry or not; but follow the definition 

 wherever it leads. 



Indehiscent Juicy Fruits. 



BERRY. A thin-skinned, indehiscent, fleshy fruit, hav- 

 ing the seeds imbedded in the pulpy mass (Figs. 335. 336). 



FIG. 335. FIG. 336. 



HESPERIDIUM. A kind of berry with a leathery rind 

 (Fig. 337). (Example, lemon and orange.) 



