Am.  Jour.  Pharm. ) 
Nov.,  1881,  ; 
Roots  of  Ajwcynums. 
555 
in  the  market  in  pieces  varying  in  thickness  from  J-  to  about  f  inch. 
The  bark  is  brown-gray,  deeply  wrinkled  and  transversely  fissured, 
about  one-fifth  the  width  of  the  root,  and  in  the  dry  state  has  an  indis- 
tinct cambium  line.  The  wood  is  yellowish,  soft,  porous,  more  par- 
ticularly in  the  outer  portion,  breaks  readily  with  a  smooth  even 
fracture,  and  has  no,  or  only  a  minute  pith.  Both  bark  and  wood 
have  a  bitter  taste,  but  that  of  the  former  is  more  persistent.  The 
stems,  which  are  sometimes  mixed  with  the  root,  have  a  smooth  red- 
brown  bark,  which  is  not  very  thick,  and  a  pith  which  has  generally 
disappeared,  leaving  the  stem  hollow ;  they  have  a  slight  sweetish 
taste. 
Bast  cells. 
Apoc.  Cannabinum.  Apoc.  Andros^mifolium. 
Transverse  sections. 
Under  the  microscope,  the  dog's-bane  shows  in  the  pith  a  few  ves- 
sels and  much  starch;  the  cells  are  largest  near  the  centre  and  are 
