86 FRUIT.S AND SEEDS 



endocarp develops as a papery core. The apple (Fig. 63), pear 

 and quince are typical of this group. 



The true berry is a more or less leathery structure enclosing 

 a mass of seeds. It may consist of the ovary only, or of the 

 ovary enclosed in the calyx. Many plants belonging to a great 

 diversity of families produce fruits of this type. Among the 



FIG. 63. The apple, the pome type of fruit. 



most important are the gooseberry, huckleberry, cranberry, 

 grape, orange, melon and cucumber. However, melons, cucum- 

 bers and gourds and other fruits belonging to the family Cucur- 

 bitacece are frequently given a special name of " pepo." 



The accessory fruit is the fleshy receptacle of a single flower 

 covered with achenes which are usually called seeds ; the straw- 

 berry belongs to this type. 



The dry fruits are those in which the ovaries develop into 

 dry pods. If this pod opens and releases the seeds it is dehiscent 



