VEGETABLE POWDERS 



527 



Fig. 194. UVA URSI. 



a. Upper epidermis. 



b. Lower epidermis. 



c. Parenchyma of leaf blade. 



d. Palisade tissue cells with oil globules and chlorophyll grains. 



e. Parenchyma from leaf blade. 

 /. Crystals. 



g. Parenchyma with crystals. 



