﻿530 
  Mutations 
  

  

  not 
  fall 
  off 
  after 
  the 
  fading 
  away 
  of 
  the 
  

   flower, 
  as 
  unfertilized 
  ovaries 
  usually 
  do; 
  

   neither 
  does 
  it 
  grow 
  out, 
  nor 
  assume 
  the 
  upright 
  

   position 
  of 
  normal 
  capsules. 
  It 
  is 
  checked 
  in 
  its 
  

   development, 
  and 
  at 
  the 
  time 
  of 
  ripening 
  it 
  is 
  

   nearly 
  of 
  the 
  same 
  length 
  as 
  in 
  the 
  beginning. 
  

   Many 
  of 
  them 
  contain 
  no 
  good 
  seeds 
  at 
  all 
  ; 
  from 
  

   others 
  I 
  have 
  succeeded 
  in 
  saving 
  only 
  a 
  hun- 
  

   dred 
  seeds 
  from 
  thousands 
  of 
  capsules. 
  

  

  These 
  seeds, 
  if 
  purely 
  pollinated, 
  and 
  with 
  

   the 
  exclusion 
  of 
  the 
  visits 
  of 
  insects, 
  reproduce 
  

   the 
  variety 
  entirely 
  and 
  without 
  any 
  reversion 
  

   to 
  the 
  lamarckiana 
  type. 
  

  

  Correlated 
  with 
  the 
  detailed 
  structures 
  is 
  the 
  

   form 
  of 
  the 
  flower-buds. 
  They 
  lack 
  the 
  high 
  

   stigma 
  placed 
  above 
  the 
  anthers, 
  which 
  in 
  the 
  

   lamarckiana, 
  by 
  the 
  vigorous 
  growth 
  of 
  the 
  

   style, 
  extends 
  the 
  calyx 
  and 
  renders 
  the 
  flower- 
  

   bud 
  thinner 
  and 
  more 
  slender. 
  Those 
  of 
  the 
  

   brevistylis 
  are 
  therefore 
  broader 
  and 
  more 
  

   swollen. 
  It 
  is 
  quite 
  easy 
  to 
  distinguish 
  the 
  in- 
  

   dividuals 
  by 
  this 
  striking 
  character 
  alone, 
  al- 
  

   though 
  it 
  differs 
  from 
  the 
  parent 
  in 
  other 
  par- 
  

   ticulars. 
  

  

  The 
  leaves 
  of 
  the 
  0. 
  brevistylis 
  are 
  more 
  

   rounded 
  at 
  the 
  tip, 
  but 
  the 
  difference 
  is 
  only 
  pro- 
  

   nounced 
  at 
  times, 
  slightly 
  in 
  the 
  adult 
  rosettes, 
  

   but 
  more 
  clearly 
  on 
  the 
  growing 
  summits 
  of 
  the 
  

   stems 
  and 
  branches. 
  By 
  this 
  character, 
  the 
  plants 
  

  

  