VEGETABLE POWDERS 



441 



, 







IfuCI 



. 



Fig. 149. PILOCARPUS. 



a. Lower epidermis. 



b. Trichomes. 



c. Upper epidermis, lateral view. 



d. Aggregate crystals of calcium oxa.la.te. 



e. Upper epidermis. 

 /. Tracheids. 



g. Sclerenchyma. 



