490 POWDERED VEGETABLE DRUGS 



183. (Fig. 175.) SENEGA. Senega. U. S. 

 Fl. ex. 30. 



Senega, snakeroot, E. Senega wurzel, G. Poly gale de Virginie, (Fr. 



The roots of Poly gala Senega L., Polygalacese. 



Light yellowish brown. 



Peculiar, heavy, somewhat rancid odor. 



Sweetish, pungent. 



Parenchyma cells elongated; many of them collenchymatous ; 

 phloem groups distributed through parenchyma. No cell contents 

 excepting fat. Outer yellowish cork. Numerous tracheids and 

 porous ducts. 



Ash 5 per cent. 



Compare with the western varieties with which the above is 

 frequently adulterated. Other adulterants may also be suspected. 



