FRUIT STRUCTURE 201 



colored bands traversing the parenchyma masses. 

 The nbro-vascular elements are comparatively few, 

 the fibers and vessels being apparent on longitudinal 

 view. 



Endocarp Tissues. The endocarp usually consists 

 of a single layer, or, at most, two layers, of irregularly 

 rectangular cells (Plate 65). In powdered materials 

 the endocarp cells are usually apparent on surface view 

 as masses of thick-walled, long, rectangular cells, either 

 separated from or attached to the mesocarp tissues. 

 In certain fruits of this class the endocarp cells are 

 arranged in groups, the cells of each group extending 

 in different directions from those of the surrounding 

 groups, in a manner similar to the strips in parquet 

 flooring. 



DRUPACEOUS FRUITS 



The drupaceous fruits are indehiscent, and their 

 seeds are separated from the mesocarp layer by a 

 hard endocarp. Certain fruits of this class possess 

 fleshy mesocarps, while in others the mesocarp layer 

 is dry and compact in texture. The structures 

 described in the following notes on the pepper fruit 

 are more or less common to the non-fleshy drupace- 

 ous fruits. 



PEPPER 



Exocarp Tissue. This tissue consists of a single 

 layer of rectangular or polygonal cells. The individual 

 cells are dark-colored and rather thick-walled (Plate 

 66). In powdered pepper the cells of this layer are 

 seen on surface view and appear as masses of brownish 

 or black polygonal cells, usually consolidated with 

 the outer stone cells of the mesocarp. 



