30 
The  Anatomy  of  Edible  Berries. 
f  Am.  Jour.  Pharm. 
\    January,  1905. 
not  arranged  in  a  marked  radiating  pattern.  These  stone  cells  are* 
angular  or  elliptical  and  vary  in  diameter  up  to  0-2  millimeter.  The 
walls  (0  02  millimeter  or  less  thick)  are  pierced  with  numerous 
small  pores.  They  occur  either  singly  or  in  groups  throughout  the 
mesocarp,  and  may  be  readily  separated  from  the  soft  tissues  by 
pressure. 
(4)  Endocarp  {Fig,  35,  end).— Most  of  the  elements  of  this  hard 
coat  are  stone  cells,  about  the  same  size  and  shape  as  those  of  the 
Fig.  35. — Huckleberry.  Transverse  section  of  endocarp  and  seed,  end, 
endocarp  with  large  isodiametric  stone  cells  and  If,  narrow  longitudinally 
extended  fibers;  S,  testa;  N,  hyaline  layer  (nucellus);  E,  endosperm.    X  160. 
mesocarp  (although  usually  thicker-walled),  but  in  the  wall  adjoin- 
ing the  mesocarp  there  is  a  group  of  narrow  sclerenchymatous  fibers 
running  parallel  with  the  axis  of  the  fruit  and  similar  fibers  form 
the  inner  layer  of  the  coat. 
The  pits  of  the  huckleberry  crush  more  readily  between  the  teeth 
than  those  of  the  bramble  fruits,  owing  to  the  larger  size  of  the 
stone  cells  and  the  relatively  larger  cell  cavities. 
Testa  [Fig.  35,  S). — There  is  but  one  layer  of  cells  in  this  coat, 
which  may  be  removed  after  cutting  off  the  endocarp  and  studied 
