VEGETABLE POWDERS 



275 



Fig. 63. CASTANEA. Leaf. 



a. Lower epidermis. 



b. Upper epidermis. 



c. Stellate trichomes. 



d. Glandular trichome. 



e. Aggregate crystals. 

 /. Spiral ducts. 



g. Bast fibers. 

 h. Parenchyma. 



