Am.  Jour.  Pharm. ) 
April,  1895.  J 
Structure  of  Veratrum  Viride. 
199 
rayed,  with  conspicuously  large  scalariform  ducts  at  the  inner  ends 
of  the  xylem  rays,  and  very  small  ones  at  the  exterior  ends.  The 
cells  of  the  endodermis  have  their  outer  walls  thin,  but  those  of  its 
cells  which  come  opposite  the  phloem  masses  are  conspicuously 
thickened  in  their  inner  and  radial  walls.  Those  opposite  the  ends 
of  the  xylem  rays  are  usually  but  slightly  thickened. 
Fig.  3. 
The  rhizomes  in  the  dried  forms  are  dark  brown,  or  blackish, 
exteriorly,  usually  crowned  at  their  upper  end  with  the  remains  of 
the  solid  above-ground  stem,  ensheathed  by  the  numerous  thin, 
tunicated  leaf-bases.    To  facilitate  drying,  they  are  commonly  split 
