Fruits 



181 



in the same way. Since the inner wall of the ovary is so hard, 

 there is no need for the seed-coat to harden. Make out the 

 parts of a Date. A Date is not a drupe. 



FIG. 180. Transverse sec- 

 tion through a Goose- 

 berry ; the firmer outer 

 layer of the pericarp en- 

 closes the succulent flesh ; 

 the seeds lie embedded in 

 the latter, and are at- 

 tached by long funiculi to 

 two opposite parietal 

 FIG. 179. Longitudinal section through the uni- placentae. (FromThom6 

 locular drupe of the Peach. (From Thome and and Bennett's " Struc- 

 Bennett's "Structural and Physiological Bo- tural and Physiological 

 tany".) Botany".) 



A berry is a fruit with a firm outer covering ; the rest of 

 the fruit is juicy. Did you ever look at a young orange? 

 The inner walls of the fruit are 

 covered with tiny hairs. These 

 grow and fill the cavities as the 

 fruit ripens. They make the 

 juicy part of the fruit. 



A young Apple shows five 

 carpels surrounded by a green 

 cup. This cup grows and ripens 

 with the ovaries. A Rose Hip 

 has a fruit built on a similar 

 plan, only there 

 carpels. 



The part outside the outer 

 double line, in Fig. 181, is the 

 receptacle which bears the calyx 

 at the top. It encloses and is united with the five carpels, the 

 core. The mesocarp lies between the outer and inner double 

 lines of the diagram. The inner hard shining layer surround- 

 ing the seeds is the endocarp. 



are more FIG. 181. Longitudinal section 

 through an Apple : C, dry persist- 

 ent calyx limb ; E, loculi with car- 

 tilaginous endocarp ; T, mesocarp. 

 (From Thom6 and Bennett's 

 " Structural and Physiological 

 Botany ".) 



