450 POWDERED VEGETABLE DRUGS 



157. (Fig. 154.) PRINOS. Black Alder. 

 Fl. ex. 60. 



Winterberry, feverbush, E. Prinos, G., Fr. 



The bark of Prinos verticillatus L., Aquifoliaceae. 



Light brown, greenish tinge. 



Nearly odorless. 



Bitter, somewhat astringent and pungent. 



Outer bark of small, colorless, thick-walled, flattened cells. Middle 

 bark of loosely united spherical parenchyma cells. Inner barkjof 

 elongated cells, with some small compound starch granules. Numer- 

 ous typical, thick-walled porous sclerenchyma cells and elongated 

 sclerenchyma cells. 



