﻿586 
  Mutations 
  

  

  instead 
  of 
  displaying 
  a 
  bright 
  yellow 
  cup. 
  

   0. 
  cruciata 
  grows 
  in 
  the 
  Adirondack 
  Mountains, 
  

   in 
  the 
  states 
  of 
  New 
  York 
  and 
  Vermont, 
  and 
  

   seems 
  to 
  be 
  abundant 
  there. 
  It 
  has 
  been 
  intro- 
  

   duced 
  into 
  botanical 
  gardens 
  and 
  yielded 
  a 
  num- 
  

   ber 
  of 
  hybrids, 
  especially 
  with 
  0. 
  biennis 
  and 
  0. 
  

   lamarckiana, 
  and 
  the 
  narrow 
  petals 
  of 
  the 
  

   parent-species 
  may 
  be 
  met 
  with 
  in 
  combination 
  

   with 
  the 
  stature 
  and 
  vegetative 
  characteristics 
  

   of 
  these 
  last 
  named 
  species. 
  0. 
  cruciata 
  has 
  a 
  

   purple 
  foliage, 
  while 
  biennis 
  and 
  lamarckiana 
  

   are 
  green, 
  and 
  many 
  of 
  the 
  hybrids 
  may 
  in- 
  

   stantly 
  be 
  recognized 
  by 
  their 
  purple 
  color. 
  

  

  The 
  curious 
  attribute 
  of 
  the 
  petals 
  is 
  not 
  to 
  be 
  

   considered 
  simply 
  as 
  a 
  reduction 
  in 
  size. 
  On 
  

   anatomical 
  inquiry 
  it 
  has 
  been 
  found 
  that 
  these 
  

   narrow 
  petals 
  bear 
  some 
  characteristics 
  which, 
  

   on 
  the 
  normal 
  plants, 
  are 
  limited 
  to 
  the 
  calyx. 
  

   Stomata 
  and 
  hairs, 
  and 
  the 
  whole 
  structure 
  of 
  

   the 
  surface 
  and 
  inner 
  tissues 
  on 
  some 
  parts 
  of 
  

   these 
  petals 
  are 
  exactly 
  similar 
  to 
  those 
  of 
  the 
  

   calyx, 
  while 
  on 
  others 
  they 
  have 
  retained 
  the 
  

   characteristics 
  of 
  petals. 
  Sometimes 
  there 
  

   may 
  even 
  be 
  seen 
  by 
  the 
  naked 
  eye 
  green 
  longi- 
  

   tudinal 
  stripes 
  of 
  calyx-like 
  structure 
  alter- 
  

   nating 
  with 
  bright 
  yellow 
  petaloid 
  parts. 
  For 
  

   these 
  reasons 
  the 
  cruciata 
  character 
  may 
  be 
  con- 
  

   sidered 
  as 
  a 
  case 
  of 
  sepalody 
  of 
  the 
  petals, 
  or 
  of 
  

   the 
  petals 
  being 
  partly 
  converted 
  into 
  sepals. 
  

  

  