Am.  Jour.  Pharm.  \ 
August,  1895.  / 
Viburnum  Prunifolium . 
391 
Tests  by  means  of  ferric  solutions  show  the  presence  of  consid- 
erable quantities  of  tannic  matters  in  the  middle  bark,  in  the  soft 
bast  and  in  the  medullary  rays. 
A  cross-section  of  the  stem  bark  of  V.  prunifolium  shows  groups 
fig.  4. 
Viburnum  prunifolium — Bark  of  root. 
Cross-section. 
of  stone  cells  somewhat  irregularly  disposed,  but  no  bast  fibres. 
These  groups  appear  in  this  section  rounded  or  somewhat  elongated 
in  a  tangential  direction,  or  sometimes  irregular  in  outline,  but  in 
longitudinal  view  they  appear  mostly  fusiform,  and  sometimes  five  or 
