Am.  Jour.  Pharm.  1 
February,  1897.   /  ' 
Solatium  Carolinense. 
87 
has  a  similar  appearance  to  the  structure  of  a  dicotyl  stem.  Zinc 
chloriodide  iodine  shows  an  abundance  of  starch  in  the  cells  of  the 
medullary  rays,  phloem,  collenchyma  and  cortical  parenchyma. 
Chloral  hydrate  iodine  gives  the  same  indications.  The  epidermis 
of  the  mature  root  consists  of  several  rows  of  suberous  tissue, 
which  exfoliates  at  the  surface ;  beneath  this  is  a  circle  consisting  of 
-A 
-  B 
-H 
Fig.  3,  longitudinal  section  of  young  root  of  Solanum  Carolinense,  magni- 
fied 75  diameters.  A,  epidermis,  not  yet  displaced  by  cork  cells  forming 
beneath  ;  c,  cortical  parenchyma ;  d,  phloem  tissue  ;  e,  cambium  zone ;  f,  xy- 
lem  tissue,  consisting  of  wood  cells  and  ducts  ;  g,  central  parenchyma,  not 
yet  developed  into  xylem  tissue  ;  h,  duct  of  xylem. 
several  rows  of  collenchyma  tissue  ;  interior  to  this  a  layer  of  cortical 
parenchyma,  consisting  of  several  tiers  of  cells,  then  the  phloem  tis- 
sue and  finally  the  xylem,  which  extends  to  the  centre  and  is  sepa- 
rated from  the  phloem  by  the  cambium  zone.  The  different  rays 
are  separated  by  the  medullary  rays. 
