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  that 
  of 
  the 
  homologous 
  variability. 
  It 
  asserts 
  

   that 
  the 
  same 
  deviation 
  may 
  occur 
  in 
  different, 
  

   but 
  homologous 
  parts 
  of 
  the 
  same 
  plant. 
  We 
  

   have 
  already 
  dealt 
  with 
  some 
  instances, 
  as 
  the 
  

   occurrence 
  of 
  the 
  same 
  pigment 
  in 
  the 
  flowers 
  

   and 
  foliage, 
  in 
  the 
  fruits 
  and 
  seeds 
  of 
  the 
  same 
  

   plant, 
  as 
  also 
  illustrated 
  by 
  the 
  loss 
  of 
  the 
  red 
  

   or 
  blue 
  tinge 
  by 
  flowers 
  and 
  berries. 
  Other 
  in- 
  

   stances 
  are 
  afforded 
  by 
  the 
  curious 
  fact 
  that 
  

   the 
  division 
  of 
  the 
  leaves 
  into 
  numerous 
  and 
  

   small 
  segments 
  is 
  repeated 
  by 
  the 
  petals, 
  as 
  

   in 
  the 
  common 
  celandine 
  and 
  some 
  sorts 
  of 
  

   brambles. 
  

  

  It 
  would 
  take 
  too 
  long 
  to 
  make 
  a 
  closer 
  exam- 
  

   ination 
  of 
  the 
  numerous 
  cases 
  which 
  afford 
  

   proof 
  of 
  these 
  statements. 
  Suffice 
  it 
  to 
  say 
  that 
  

   everywhere 
  the 
  results 
  of 
  close 
  inspection 
  point 
  

   to 
  the 
  general 
  rule, 
  that 
  the 
  failure 
  of 
  definite 
  

   qualities 
  both 
  in 
  species 
  and 
  in 
  varieties 
  must, 
  

   in 
  a 
  great 
  number 
  of 
  cases, 
  be 
  considered 
  as 
  only 
  

   apparent. 
  Hidden 
  from 
  view, 
  occasionally 
  re- 
  

   appearing, 
  or 
  only 
  imperfectly 
  concealed, 
  the 
  

   same 
  character 
  must 
  be 
  assumed 
  to 
  be 
  present 
  

   though 
  latent. 
  

  

  In 
  the 
  case 
  of 
  negative 
  or 
  retrogressive 
  varie- 
  

   ties 
  it 
  is 
  the 
  transition 
  from 
  the 
  active 
  into 
  a 
  

   dormant 
  state 
  to 
  which 
  is 
  due 
  the 
  origin 
  of 
  the 
  

   variety. 
  Positive 
  varieties 
  on 
  the 
  contrary 
  owe 
  

   their 
  origin 
  to 
  the 
  presence 
  of 
  some 
  character 
  

  

  