﻿282 
  Retrograde 
  Varieties 
  

  

  cornuta) 
  the 
  sea-shore 
  aster 
  (Aster 
  Tripolium), 
  

   corn-rose 
  (Agrostemma 
  Githago), 
  the 
  Sweet 
  

   William 
  (Silene 
  Armeria), 
  and 
  many 
  garden 
  

   flowers, 
  as 
  for 
  instance, 
  the 
  Clarkia 
  pulchella, 
  

   the 
  Polemonium 
  coeruleum, 
  the 
  Veronica 
  longi- 
  

   folia, 
  the 
  gloxinias 
  and 
  others. 
  If 
  the 
  red 
  hue 
  

   is 
  combined 
  with 
  a 
  yellow 
  ground-color 
  in 
  the 
  

   species, 
  the 
  variety 
  will 
  be 
  yellow 
  and 
  the 
  hy- 
  

   brid 
  will 
  have 
  the 
  red 
  and 
  yellow 
  mixture 
  of 
  the 
  

   species 
  as 
  for 
  instance, 
  in 
  the 
  genus 
  Geum. 
  The 
  

   toad-flax 
  has 
  an 
  orange-colored 
  palate, 
  and 
  a 
  

   variety 
  occurs 
  in 
  which 
  the 
  palate 
  is 
  of 
  the 
  same 
  

   yellow 
  tinge 
  as 
  the 
  remaining 
  parts 
  of 
  the 
  

   corolla. 
  The 
  hybrid 
  between 
  them 
  is 
  in 
  all 
  re- 
  

   spects 
  like 
  the 
  parent-species. 
  

  

  Other 
  instances 
  could 
  be 
  given. 
  In 
  berries 
  

   the 
  same 
  rule 
  prevails. 
  The 
  black 
  nightshade 
  

   has 
  a 
  variety 
  with 
  yellow 
  berries, 
  and 
  the 
  black 
  

   color 
  returns 
  in 
  the 
  hybrid. 
  Even 
  the 
  foliage 
  of 
  

   some 
  garden-plants 
  may 
  afford 
  instances, 
  as 
  for 
  

   instance, 
  the 
  purplish 
  amaranth 
  (Amaranthus 
  

   caudatus). 
  It 
  has 
  a 
  green 
  variety, 
  but 
  the 
  hy- 
  

   brid 
  between 
  the 
  two 
  has 
  the 
  red 
  foliage 
  of 
  the 
  

   species. 
  

  

  Special 
  marks 
  in 
  leaves 
  and 
  in 
  flowers 
  follow 
  

   the 
  same 
  rule. 
  Some 
  varieties 
  of 
  the 
  opium- 
  

   poppy 
  have 
  large 
  black 
  patches 
  at 
  the 
  basal 
  end 
  

   of 
  the 
  petals, 
  while 
  in 
  others 
  this 
  pattern 
  is 
  en- 
  

   tirely 
  white. 
  In 
  crossing 
  two 
  such 
  varieties, 
  

  

  