Am.  Jour.  Pharm.l 
January,  1915.  j 
Belladonna  and  Hyoscyamus. 
5 
The  stems,  leaves,  and  flowers  of  Hyoscyamus  niger  contain  the 
cell-sap  coloring  principle  anthocyanin.  Warm  aqueous  extractions 
of  the  corollas  yield  solutions  of  a  blue  color,  which  give  a  deep 
pink  with  dilute  acids  and  a  rich  grass-green  color  with  lime  water. 
When  strong  alkalies  are  added  to  a  solution  of  the  coloring  principle 
a  dark  green  evolves,  quickly  changing  to  yellow  and  yellowish-brown. 
Hyoscyamus  alb  us  does  not  contain  this  cell-sap  coloring  principle, 
and  will  not  give  any  of  the  above  reactions.  Very  small  seedling 
plants  of  the  two  species  of  Hyoscyamus  mentioned  above  may  be 
differentiated  by  making  longitudinal  sections  of  the  young  petioles 
