VEGETABLE POWDERS 



513 



Fig. 187. TABACUM. 



a. Upper epidermis. 



b. Non-glandular trichomes. 



c. Glandular trichomes. 



d. Cells with crystals. 



e. Parenchyma (collenchymatous) from midrib. 

 /. Leaf parenchyma with chlorophyll. 



33 



