﻿Smithsonian 
  Report, 
  1943. 
  --Cook 
  

  

  Plate 
  2 
  

  

  

  r- 
  arw> 
  - 
  

  

  .. 
  : 
  > 
  : 
  :?^ 
  --^ 
  / 
  ^^i^r:^ 
  

  

  

  Branching 
  Habits 
  of 
  Castilla 
  Rubber 
  Trees. 
  

  

  The 
  young 
  trees 
  in 
  the 
  foreground 
  have 
  only 
  lateral 
  branches, 
  horizontal 
  or 
  drooping, 
  slender, 
  simple, 
  and 
  

   deciduous. 
  The 
  older 
  tree, 
  fruiting 
  on 
  its 
  lateral 
  branches, 
  also 
  has 
  strong 
  ascending 
  branches, 
  forming 
  

   the 
  permanent 
  divisions 
  of 
  the 
  trunk. 
  Trees 
  of 
  fruiting 
  age 
  have 
  an 
  aimual 
  leaf 
  fall 
  at 
  the 
  flowering 
  season, 
  

   but 
  a 
  strong 
  shoot 
  at 
  the 
  left 
  holds 
  its 
  leaves 
  like 
  a 
  young 
  tree. 
  

  

  