498 POWDERED VEGETABLE DRUGS 



187. (Fig. 179.) SIN APIS (BRASSICA) NIGRA. Black 

 Mustard. U. S. 



Moderately fine. 



Schwarzer Senf, G. Moutarde noir (grise), Fr. 



The seeds of Sinapis nigra Koch, Cruciferae. 



Reddish brown. 



Odor and taste as for white mustard. 



Histology closely similar to that of white mustard. The mechanical 

 cells (Fig. 179, 6), are however a bright reddish brown while they are 

 colorless in white mustard. Collenchyma cells are wanting. 



Ash 6 per cent. 



Ground mustard is very frequently adulterated with flour, starch, 

 curcuma, a small amount of capsicum; also with seeds of other species 

 of Sinapis and Brassica. 



