544 
Anatomy  of  Edible  Berries. 
( Am.  Jour.  Pharm. 
1  November,  1904. 
On  the  outer  surfaces  and  on  the  ends  of  the  inner  surfaces,  the 
lobes  are  clothed  with  numerous  hairs ;  but  the  throat  is  smooth,  as 
are  also  the  petals  and  the  styles.  The  latter  is  entire  for  at  least 
three-fourths  its  length,  but  two-lobed  at  the  end. 
Histology  Meyen1  noted  the  glands  on  the  black  currant  leaf  in 
1837.   Lampe2  studied  the  pericarp  but  did  not  describe  the  glands. 
The  cells  of  the  Epicarp  [Fig.  21,  epi)  are  beaded  and  of  about 
the  same  size  as  in  the  red  currant.  Here  and  there  may  be  seen 
the  bright  yellow  disk-shaped  glands  which  are  often  0-17  millimeter 
Fig.  21. — Black  currant,    epi,  epicarp  with  d  gland,  in  surface  view.     X  160. 
or  more  in  diameter  (d).  They  occur  in  still  greater  numbers  on 
the  leaves,  as  was  noted  by  Meyen,  who  found  that  they  agreed  in 
structure  with  the  glands  of  the  hop.  These  glands  consist  of  a 
single  layer  of  cells  in  the  form  of  a  disk,  joined  in  the  middle  to 
the  epicarp  by  means  of  a  short  several-celled  stalk.  The  yellow 
oily  secretion  to  which  the  plant  owes  its  characteristic  odor  and 
flavor  is  contained  in  the  reservoir  formed  by  the  separation  of  the 
outer  cuticle  from  the  cells. 
The  Mesocarp,  Endocarp,  and  Seed  have  the  same  general  struc- 
ture as  the  same  parts  of  the  red  currant. 
Under  the  microscope  the  Calyx  Hairs  have  the  same  appearance 
1  Secretionsorgane  d.  Pnanzen.    Berlin,  1837. 
2  Loc.  cit.,  p.  295. 
