358 POWDERED VEGETABLE DRUGS 



100. (Fig. 106.) GOSSYPIUM ROOT BARK. Cotton root 



bark. U. S. 



Fl. ex. 30. 



Baumwollrinde, Baumwoll-Wurzelrinde, G. Ecorce de la racine de 

 cotonnier, Fr. 



The root bark of Gossypium herbaceum L., Malvaceae. 



Light brown. 



Odorless. 



Slightly pungent, astringent and mucilaginous. 



Some large celled cork. Thin-walled inner parenchyma with 

 simple and compound starch granules and aggregate crystals of cal- 

 cium oxalate. Numerous long slender bast cells. Some tissue with 

 reddish brown coloring matter. Porous tracheids and ducts. 



Ash 5.5 per cent. 



Rarely adulterated. 



