﻿Stability 
  and 
  Real 
  Atavism 
  181 
  

  

  from 
  which 
  they 
  must 
  evidently 
  have 
  arisen. 
  

   Instances 
  are 
  on 
  record 
  of 
  the 
  hazel, 
  Corylus 
  

   Avellana, 
  of 
  the 
  allied 
  Corylus 
  tubulosa, 
  of 
  

   the 
  red 
  beech, 
  the 
  brown 
  birch 
  and 
  of 
  some 
  other 
  

   purple 
  varieties. 
  Even 
  the 
  red 
  bananas, 
  which 
  

   bear 
  fruits 
  without 
  seeds 
  and 
  therefore 
  have 
  no 
  

   other 
  way 
  of 
  being 
  propagated 
  than 
  by 
  buds, 
  

   have 
  produced 
  a 
  green 
  variety 
  with 
  yellow 
  

   fruits. 
  The 
  Hortensia 
  of 
  our 
  gardens 
  is 
  an- 
  

   other 
  instance 
  of 
  a 
  sterile 
  form 
  which 
  has 
  been 
  

   observed 
  to 
  throw 
  out 
  a 
  branch 
  with 
  cymes 
  

   bearing 
  in 
  their 
  center 
  the 
  usual 
  small 
  stam- 
  

   inate 
  and 
  pistillate 
  flowers 
  instead 
  of 
  the 
  large 
  

   radiate 
  and 
  neutral 
  corollas 
  of 
  the 
  variety, 
  

   thereby 
  returning 
  to 
  the 
  original 
  wild 
  type. 
  

   Crisped 
  weeping-willows, 
  crisped 
  parsley 
  and 
  

   others 
  have 
  reverted 
  in 
  a 
  similar 
  manner. 
  

  

  All 
  such 
  cases 
  are 
  badly 
  in 
  need 
  of 
  a 
  

   closer 
  investigation. 
  And 
  as 
  they 
  occur 
  only 
  

   occasionally, 
  or 
  as 
  it 
  is 
  commonly 
  stated, 
  by 
  ac- 
  

   cident, 
  the 
  student 
  of 
  nature 
  should 
  be 
  prepared 
  

   to 
  examine 
  carefully 
  any 
  case 
  which 
  might 
  pre- 
  

   sent 
  itself 
  to 
  him. 
  Many 
  phases 
  of 
  this 
  difficult 
  

   problem 
  could 
  no 
  doubt 
  be 
  solved 
  in 
  this 
  way. 
  

   First 
  of 
  all 
  the 
  question 
  arises 
  as 
  to 
  whether 
  the 
  

   case 
  is 
  one 
  of 
  real 
  atavism, 
  or 
  is 
  only 
  seemingly 
  

   so, 
  being 
  due 
  to 
  hybrid 
  or 
  otherwise 
  impure 
  de- 
  

   scent 
  of 
  the 
  varying 
  individual, 
  and 
  secondly 
  

   whether 
  it 
  may 
  be 
  only 
  an 
  instance 
  of 
  the 
  regu- 
  

  

  