394 
Rhamnus  Purshiana. 
Am.  Jour.  Pharm. 
September,  1914. 
slightly  or  not  at  all  lobed,  with  thin,  rather  juicy  pulp  and  two  or 
three  nutlets.  It  is  at  first  green,  then  red,  and  finally  black  at 
maturity. 
Fig.  3. — Cutting  Cascara  tree  in  Washington  forests. 
The  nutlets  are  obovate,  usually  a  third  to  an  inch  long,  rounded 
on  the  back,  and  flattened  on  the  inner  surface  by  mutual  pressure, 
with  two  bony,  tooth-like  enlargements  at  the  base,  one  on  each 
side  of  the  large  scar  of  the  hilum,  and  a  thin  gray  or  pale  yellow- 
