﻿New 
  Species 
  of 
  Oenothera 
  543 
  

  

  partly 
  this 
  type 
  and 
  partly 
  that 
  of 
  any 
  other 
  of 
  

   the 
  new 
  species 
  derived 
  from 
  lamarckiana, 
  that 
  

   might 
  have 
  been 
  used 
  as 
  the 
  pollen-parent. 
  This 
  

   average 
  seems 
  to 
  be 
  a 
  general 
  rule, 
  recurring 
  

   in 
  all 
  experiments, 
  and 
  remaining 
  unchanged 
  

   through 
  a 
  long 
  series 
  of 
  successive 
  generations. 
  

   The 
  fluctuations 
  around 
  this 
  mean 
  go 
  up 
  to 
  near- 
  

   ly 
  50$ 
  and 
  down 
  nearly 
  to 
  1$, 
  but, 
  as 
  in 
  other 
  

   cases, 
  such 
  extreme 
  deviations 
  from 
  the 
  aver- 
  

   age 
  are 
  met 
  with 
  only 
  exceptionally. 
  

  

  The 
  second 
  category 
  includes 
  the 
  inconstant 
  

   but 
  perfectly 
  fertile 
  species. 
  I 
  have 
  already 
  

   given 
  the 
  names 
  of 
  the 
  only 
  two 
  forms, 
  which 
  

   deserve 
  to 
  be 
  mentioned 
  here. 
  

  

  One 
  of 
  them 
  is 
  called 
  scintillans 
  or 
  the 
  shiny 
  

   evening-primrose, 
  because 
  its 
  leaves 
  are 
  of 
  a 
  

   deep 
  green 
  color 
  with 
  smooth 
  surfaces, 
  glistening 
  

   in 
  the 
  sunshine. 
  On 
  the 
  young 
  rosettes 
  these 
  

   leaves 
  are 
  somewhat 
  broader, 
  and 
  afterwards 
  

   somewhat 
  narrower 
  than 
  those 
  of 
  0. 
  lamarck- 
  

   iana 
  at 
  the 
  corresponding 
  ages. 
  The 
  plants 
  

   themselves 
  always 
  remain 
  small, 
  never 
  reaching 
  

   the 
  stature 
  of 
  the 
  ancestral 
  type. 
  They 
  are 
  

   likewise 
  much 
  less 
  branched. 
  They 
  can 
  easily 
  

   be 
  cultivated 
  in 
  annual 
  generations, 
  but 
  then 
  

   do 
  not 
  become 
  as 
  fully 
  developed 
  and 
  as 
  fertile 
  

   as 
  when 
  flowering 
  in 
  the 
  second 
  year. 
  The 
  

   flowers 
  have 
  the 
  same 
  structure 
  as 
  those 
  of 
  the 
  

   lamarckiana, 
  but 
  are 
  of 
  a 
  smaller 
  size. 
  

  

  