Am.  Jour.  Pharm. 
January.  1915. 
Belladonna  and  Hyoscyamus. 
are  comparatively  fewer  in  Belladonna  than  in  Hyoscyamus,  and 
practically  one  can  but  rarely  observe  them  in  the  drug  Belladonna. 
Calcium  oxalate,  occurring  as  sphenoids  in  Belladonna  and  as 
single  or  twin  monoclinic  prisms,  or  occasionally  rosette  aggre- 
Fig.  6.— Various  forms  of  hairs  occurring  on  a  single  leaf  of  Hyoscyamus  niger. 
gates,  in  Hyoscyamus.  has  been  held  for  some  time  as  a  means  of 
distinction  between  these  two  plants.  In  the  last  edition  of  the 
German  Pharmacopoeia  attention  is  called  to  the  presence  of  sphenoids 
of  calcium  oxalate  in  Hyoscyamus,  and  quite  recently  Anselmino  and 
E.  Gilg  stated  that  the  crystal  sand  described  in  the  German  Pharma- 
