86 
Solatium  Carolinense. 
/Am.  Jour.  Pharm. 
\    February,  1897. 
a  great  number  of  the  cells  of  the  cortical  parenchyma,  also  in  a 
few  cells  of  the  phloem  tissue  and  the  medullary  rays.  In  the 
mature  stem,  indications  of  tannin  were  obtained  in  abundance,  in 
the  pith  parenchyma,  medullary  rays,  cambium  zone,  phloem,  corti- 
cal parenchyma  and  suberous  tissue.  In  the  leaf  indications  were 
produced  in  all  of  the  different  tissues.  In  the  fruit  tannin  indica- 
tions were  obtained  in  the  cells  of  the  section  irregularly  scattered. 
The  tannin  was  estimated  by  the  "  hide  powder  method,"  and 
found  to  be  3-10  per  cent,  in  the  leaves ;  2-27  per  cent,  in  the  root ; 
Fig.  2,  transverse  section  of  rootlet  of  Solanum  Carolinense,  magnified  75 
diameters.  A,  epidermis  ;  6,  collenchyma  tissue  ;  c,  cortical  parenchyma  ;  d, 
endodermis  ;  e,  phloem  tissue  ;  f.  cambium  zone  ;  g,  duct  of  xylem  ;  k,  xylem 
tissue,  consisting  of  wood  cells  and  ducts. 
8-o6  per  cent,  in  the  fruit ;  5-06  per  cent,  in  the  stem — all  calculated 
for  absolutely  dry  material. 
Fig.  1  represents  the  underground  portion  of  the  plant. 
Root. — Phloroglucin  and  hydrochloric  acid  stain  the  xylem  tissue, 
which  is  strongly  lignified,  a  bright  red.  In  the  young  undeveloped 
root  central  parenchyma  exists,  but  as  the  root  becomes  older  the 
xylem  of  the  radial  bundle  extends  to  the  centre  with  the  develop- 
ment of  rings  of  growth,  medullary  rays  and  a  cambium  zone,  and 
