270 POWDERED VEGETABLE DRUGS 



47. (Fig. 61.) CASCARA SAGRADA. Cascara Sagrada. U.S. 



Fl. ex. 40. 



Sacred bark, Bearberry bark, E. Amerikanische Faulbaumrinde, 

 G. 



The bark of Rhammus Purshiana D. C., Rhamnacese. 



Yellow brown. 



Nearly odorless. 



Bitter; saliva yellow. 



Numerous porous, mostly thick- walled sclerenchyma cells. Rather 

 slender, but thick-walled and porous bast fibers, accompanied by 

 numerous prismatic crystal-bearing fibers. Brown cells of the outer 

 bark. Inner bark parenchyma, with small, simple, spherical starch 

 granules and aggregate crystals of calcium oxalate. 



Ash 5.8 per cent. 



Adulterated with the bark of related species (see Frangula). 



