VEGETABLE POWDERS 



301 



Fig. 76. COCA. 



#. Upper epidermis. 



b. Lower epidermis. 



c. Upper epidermis, lateral view. 



d. Lower epidermis, lateral view. 



e. Parenchyma. 



/. Parenchyma, longitudinal view. 



g. Spongy tissue of leaf. 



h. Prismatic crystals. 



i, j. Bast cells and crystal bearing fibers. 



