VEGETABLE POWDERS 



457 



Fig. 158. PYRETHRUM. Root. 



a. Parenchyma with resin. 

 6. Sclerenchyma. 



c. Parenchyma, longitudinal view. 



d. Reticulate duct. 



e. Spiral duct. 

 /. Cork. 



g. Resin mass. 

 h. Resin mass. 



