Figure 13: Cell of sweet potato are a conglomerate of flimsy balloon-shaped cells (A, B). The Pap stain shows brown cells that appear well-defined with marginally denser cytoplasm (B). Water chestnuts have thin, flat sheets with broad anastomosing cords (C). A PAP stained preparation of water chestnuts contains rounded cells and prominent intercellular space, which take on a green hue (D). A: Sweet potato, MGG stain, 60x magnification B: Sweet potato, PAP stain, 60x magnification C: Water chestnut, MGG stain, 60x magnification D: Water chestnut, PAP stain, 100x oil magnification