﻿Monstrosities 
  421 
  

  

  same 
  way 
  heirs 
  and 
  atavists. 
  Every 
  plant, 
  if 
  

   fertilized 
  with 
  its 
  own 
  pollen, 
  gives 
  rise 
  to 
  

   both 
  types. 
  The 
  parent 
  itself 
  may 
  be 
  tricotyl- 
  

   ous 
  or 
  dicotylous, 
  or 
  show 
  any 
  amount 
  of 
  

   multiplication 
  and 
  cleavage 
  in 
  its 
  seed-leaves, 
  

   but 
  it 
  always 
  gives 
  the 
  entire 
  range 
  among 
  its 
  

   progeny 
  of 
  the 
  variation. 
  One 
  may 
  even 
  select 
  

   the 
  atavists, 
  pollinate 
  them 
  purely 
  and 
  repeat 
  

   this 
  in 
  a 
  succeeding 
  generation 
  without 
  any 
  

   chance 
  of 
  changing 
  the 
  result. 
  On 
  an 
  average 
  

   the 
  atavists 
  may 
  give 
  lower 
  hereditary 
  figures, 
  

   but 
  the 
  difference 
  will 
  be 
  only 
  slight. 
  

  

  Such 
  tricotylous 
  double 
  races 
  offer 
  highly 
  

   interesting 
  material 
  for 
  inquiries 
  into 
  questions 
  

   of 
  heredity, 
  as 
  they 
  have 
  such 
  a 
  wide 
  range 
  of 
  

   variability. 
  There 
  is 
  little 
  danger 
  in 
  asserting 
  

   that 
  they 
  go 
  upwards 
  to 
  nearly 
  100$, 
  and 
  down- 
  

   wards 
  to 
  0$, 
  diverging 
  symmetrically 
  on 
  both 
  

   sides 
  of 
  their 
  average 
  (50-55$). 
  These 
  limits 
  

   they 
  obviously 
  cannot 
  transgress, 
  and 
  are 
  not 
  

   even 
  able 
  to 
  reach 
  them. 
  Samples 
  of 
  seed 
  con- 
  

   sisting 
  only 
  of 
  tricotyls 
  are 
  very 
  rare, 
  and 
  when 
  

   they 
  are 
  met 
  with 
  the 
  presumption 
  is 
  that 
  they 
  

   are 
  too 
  few 
  to 
  betray 
  the 
  rare 
  aberrants 
  they 
  

   might 
  otherwise 
  contain. 
  Experimental 
  evi- 
  

   dence 
  can 
  only 
  be 
  reached 
  by 
  the 
  culture 
  of 
  a 
  

   succeeding 
  generation, 
  and 
  this 
  always 
  discloses 
  

   the 
  hidden 
  qualities, 
  showing 
  that 
  the 
  double 
  

  

  