398 



126. (Fig. 127.) LAPPA. Burdock. 

 Fl. ex. 60. 



Klettenwurzel, G. Bardane, Glouteron, Fr. 



The roots of Arctium Lappa L., Composite. 



Light grayish brown. 



Somewhat heavy, nauseous. 



Sweetish, bitter, mucilaginous. 



Outer cork tissue of brown cells. Parenchyma cells thin-walled, 

 rather loosely united, somewhat elongated, with inulin. Large and 

 smaller porous and reticulate ducts. A few resin ducts. Starch 

 and crystals wanting. 



Ducts and tracheids should be sparingly present; if abundant it 

 indicates that the inert older roots are used. 



