﻿540 
  Mutations 
  

  

  type 
  in 
  one 
  single 
  plant 
  seem 
  to 
  be 
  limited 
  to 
  the 
  

   admixture 
  of 
  the 
  dwarf 
  stature 
  with 
  the 
  charac- 
  

   ters 
  of 
  the 
  other 
  new 
  species. 
  

  

  These 
  seven 
  novelties 
  do 
  not 
  comprise 
  the 
  

   whole 
  range 
  of 
  the 
  new 
  productions 
  of 
  my 
  0. 
  

   lamarckiana. 
  But 
  they 
  are 
  the 
  most 
  interest- 
  

   ing 
  ones. 
  Others, 
  as 
  the 
  0. 
  semilata 
  and 
  the 
  0. 
  

   leptocarpa 
  are 
  quite 
  as 
  constant 
  and 
  quite 
  as 
  

   distinct, 
  but 
  have 
  no 
  special 
  claims 
  for 
  a 
  closer 
  

   description. 
  Others 
  again 
  were 
  sterile, 
  or 
  too 
  

   weak 
  to 
  reach 
  the 
  adult 
  stage 
  and 
  to 
  yield 
  seeds, 
  

   and 
  no 
  reliable 
  description 
  or 
  appreciation 
  can 
  

   be 
  given 
  on 
  the 
  ground 
  of 
  the 
  appearance 
  of 
  

   a 
  single 
  individual. 
  

  

  Contrasted 
  with 
  these 
  groups 
  of 
  constant 
  

   forms 
  are 
  three 
  inconstant 
  types 
  which 
  we 
  now 
  

   take 
  up. 
  They 
  belong 
  to 
  two 
  different 
  groups, 
  

   according 
  to 
  the 
  cause 
  of 
  their 
  inconstancy. 
  In 
  

   one 
  species 
  which 
  I 
  call 
  0. 
  lata, 
  the 
  question 
  

   of 
  stability 
  or 
  instability 
  must 
  remain 
  wholly 
  

   unsolved, 
  as 
  only 
  pistillate 
  flowers 
  are 
  produced, 
  

   and 
  no 
  seed 
  can 
  be 
  fertilized 
  save 
  by 
  the 
  use 
  of 
  

   the 
  pollen 
  of 
  another 
  form, 
  and 
  therefore 
  by 
  

   hybridization. 
  The 
  other 
  head 
  comprises 
  two 
  

   fertile 
  forms, 
  0. 
  scintillans 
  and 
  0. 
  elliptica, 
  

   which 
  may 
  easily 
  be 
  fertilized 
  with 
  their 
  own 
  

   pollen, 
  but 
  which 
  gave 
  a 
  progeny 
  only 
  partly 
  

   similar 
  to 
  the 
  parents. 
  

  

  The 
  OenotJiera 
  lata 
  is 
  a 
  very 
  distinct 
  form 
  

  

  