﻿New 
  Species 
  of 
  Oenothera 
  541 
  

  

  which 
  was 
  found 
  more 
  than 
  once 
  in 
  the 
  field, 
  and 
  

   recently 
  (1902) 
  in 
  a 
  luxuriant 
  flowering 
  speci- 
  

   men. 
  It 
  has 
  likewise 
  been 
  raised 
  from 
  seeds 
  

   collected 
  in 
  different 
  years 
  at 
  the 
  original 
  sta- 
  

   tion. 
  It 
  is 
  also 
  wholly 
  pistillate. 
  Apparently 
  the 
  

   anthers 
  are 
  robust, 
  but 
  they 
  are 
  dry, 
  wrinkled 
  

   and 
  nearly 
  devoid 
  of 
  contents. 
  The 
  inner 
  wall 
  

   of 
  cells 
  around 
  the 
  groups 
  of 
  pollen 
  grow 
  out 
  

   instead 
  of 
  being 
  resorbed, 
  partly 
  filling 
  the 
  

   cavity 
  which 
  is 
  left 
  free 
  by 
  the 
  miscarriage 
  of 
  

   the 
  pollen-grains. 
  This 
  miscarriage 
  does 
  not 
  

   affect 
  all 
  the 
  grains 
  in 
  the 
  same 
  degree, 
  and 
  

   under 
  the 
  microscope 
  a 
  few 
  of 
  them 
  with 
  an 
  ap- 
  

   parently 
  normal 
  structure 
  may 
  be 
  seen. 
  But 
  the 
  

   contents 
  are 
  not 
  normally 
  developed, 
  and 
  I 
  have 
  

   tried 
  in 
  vain 
  to 
  obtain 
  fertilization 
  with 
  a 
  large 
  

   number 
  of 
  flowers. 
  Only 
  by 
  cross-fertilization 
  

   does 
  0. 
  lata 
  produce 
  seeds, 
  and 
  then 
  as 
  freely 
  as 
  

   the 
  other 
  species 
  when 
  self-fertilized. 
  Of 
  course 
  

   its 
  chance 
  of 
  ever 
  founding 
  a 
  wild 
  type 
  is 
  pre- 
  

   cluded 
  by 
  this 
  defect. 
  

  

  0. 
  lata 
  is 
  a 
  low 
  plant, 
  with 
  a 
  limp 
  stem, 
  bent 
  

   tips 
  and 
  branches, 
  all 
  very 
  brittle, 
  but 
  with 
  

   dense 
  foliage 
  and 
  luxuriant 
  growth. 
  It 
  has 
  

   bright 
  yellow 
  flowers 
  and 
  thick 
  flower-buds. 
  

   But 
  for 
  an 
  unknown 
  reason 
  the 
  petals 
  are 
  apt 
  to 
  

   unfold 
  only 
  partially 
  and 
  to 
  remain 
  wrinkled 
  

   throughout 
  the 
  flowering 
  time. 
  The 
  stigmas 
  

   are 
  slightly 
  divergent 
  from 
  the 
  normal 
  type, 
  

  

  