I0 8 BOTANY. 



from the inferior fruits. Observe the structure of those 

 formed from inferior pistils, and point out the pericarp in 

 those formed from superior pistils. 



Preserve, for further study, the specimens you have 

 gathered. 



EXERCISE XLIX. 

 Parts of the Pericarp. 



EPICARP. When the walls of a pericarp are formed of 

 two or more layers of different texture, as in the peach, 

 plum, or cherry, the outer one (the skin, in the case of 

 these fruits) is called the epicarp. 



ENDOCARP. The stony case around 

 the seed of the peach, plum, or cherry, 

 is called the endocarp. But the en- 

 docarp of fruits is not always stony. 

 Whatever its texture, the inner layer 

 of a pericarp is named the endocarp. 

 MESOCARP. Sometimes, between 

 FIG. 334 . the outer and inner parts of a peri- 



carp, there is found a third layer of 

 different aspect, like the pulp of a peach. This third layer 

 is called the mesocarp. The distinction between the epi- 

 carp and mesocarp is often very, slight, and then both to- 

 gether are called the epicarp. 



In Fig. 334, e is the endocarp, s the mesocarp, and g 

 the epicarp. 



In Fig. 333, E is the epicarp, N the endocarp, and S 

 the seeds. At N is shown a slight development of the 

 mesocarp. Point out these parts in an apple and a peach. 

 Point out the parts of the pericarp in the different fruits 

 pictured upon the charts. 



Classify your collection of fruits by the structure of 

 the pericarp. Put by themselves all those that have but 

 one layer in the pericarp. Put those with two layers an 

 epicarp and endocarp by themselves, leaving those with 



