﻿Striped 
  Flowers 
  317 
  

  

  from 
  striped 
  to 
  red 
  and 
  from 
  red 
  to 
  stripes, 
  oc- 
  

   cur 
  by 
  seed, 
  even 
  by 
  the 
  strictest 
  exclusion 
  of 
  

   cross-fertilization. 
  As 
  far 
  as 
  my 
  experiments 
  

   go, 
  they 
  are 
  the 
  rule, 
  and 
  parent-plants 
  that 
  

   do 
  not 
  give 
  such 
  reversions, 
  at 
  least 
  in 
  some 
  of 
  

   their 
  offspring, 
  are 
  very 
  rare, 
  if 
  not 
  wholly 
  

   wanting. 
  Bud-variations 
  and 
  variations 
  within 
  

   the 
  spike 
  I 
  have 
  as 
  yet 
  only 
  observed 
  on 
  the 
  

   striped 
  individuals, 
  and 
  never 
  on 
  the 
  red 
  ones, 
  

   though 
  I 
  am 
  confident 
  that 
  they 
  might 
  appear 
  in 
  

   larger 
  series 
  of 
  experiments. 
  Both 
  cases 
  are 
  

   more 
  common 
  on 
  individuals 
  with 
  broad 
  stripes 
  

   than 
  on 
  plants 
  bearing 
  only 
  the 
  narrower 
  red 
  

   lines, 
  as 
  might 
  be 
  expected, 
  but 
  even 
  on 
  the 
  al- 
  

   most 
  purely 
  yellow 
  individuals 
  they 
  may 
  be 
  seen 
  

   from 
  time 
  to 
  time. 
  Bud-variations 
  produce 
  

   branches 
  with 
  spikes 
  of 
  uniform 
  red 
  flowers. 
  

   Every 
  bud 
  of 
  the 
  plant 
  seems 
  to 
  have 
  equal 
  

   chances 
  to 
  be 
  transformed 
  in 
  this 
  way. 
  Some 
  

   striped 
  racemes 
  bear 
  a 
  few 
  red 
  flowers, 
  which 
  

   ordinarily 
  are 
  inserted 
  on 
  one 
  side 
  of 
  the 
  spike 
  

   only. 
  As 
  they 
  often 
  cover 
  a 
  sharply 
  defined 
  

   section 
  of 
  the 
  raceme, 
  this 
  circumstance 
  has 
  

   given 
  rise 
  to 
  the 
  term 
  of 
  sectional 
  variability 
  to 
  

   cover 
  such 
  cases. 
  Sometimes 
  the 
  section 
  is 
  

   demarcated 
  on 
  the 
  axis 
  of 
  the 
  flower- 
  spike 
  by 
  a 
  

   brownish 
  or 
  reddish 
  color, 
  sharply 
  contrasting 
  

   with 
  the 
  green 
  hue 
  of 
  the 
  remaining 
  parts. 
  

   Sectional 
  variation 
  mav 
  be 
  looked 
  at 
  as 
  a 
  

  

  