﻿Smithsonian 
  Report. 
  1943. 
  Cook 
  

  

  Plate 
  9 
  

  

  Abnormal 
  Hevea 
  Seedlings 
  With 
  Narrow 
  leaves. 
  

  

  A 
  frequent 
  growth 
  disorder, 
  resulting 
  in 
  remarkable 
  diversity 
  of 
  leaf 
  form 
  among 
  the 
  affected 
  plants, 
  most 
  

   of 
  them 
  stunted 
  and 
  smothered 
  in 
  the 
  seed 
  beds, 
  but 
  a 
  few 
  recovering 
  by 
  abrupt 
  transitions 
  toward 
  normal 
  

   leaf 
  forms, 
  as 
  in 
  the 
  figure 
  at 
  the 
  left. 
  Right, 
  an 
  example 
  of 
  extreme 
  attenuation 
  of 
  the 
  leaves, 
  abnormal 
  

   in 
  length 
  and 
  number 
  of 
  veins; 
  natural 
  size, 
  to 
  compare 
  with 
  plate 
  10 
  

  

  