Figure 15: The blueberry (A) has cell walls that are regular and rectangular in shape. Under PAP staining, the exocarp loses its “blue” color but retains its rectangular organization. Dates have amorphous pulpy appearance attached to long fibers (B). The grape (C) is a type of berry, and as has amorphous faintly blue flesh with MGG stain. The grapefruit consists of vesicles filled with fluid, and fibrous endocarp. Seen under 40x, the macerated vesicles rupture to leave behind delicate tangles of fibrous endocarp (D). A: Blueberry, PAP stain, 40x magnification B: Date, PAP stain, 40x magnification C: Grape, MGG stain, 60x magnification D: Grapefruit, PAP stain, 40x magnification