﻿New 
  Species 
  of 
  Oenothera 
  527 
  

  

  The 
  laevifolia, 
  or 
  smooth-leaved 
  variety, 
  was 
  

   one 
  of 
  the 
  very 
  first 
  deviating 
  types 
  found 
  in 
  

   the 
  original 
  field. 
  This 
  was 
  in 
  the 
  summer 
  of 
  

   1887, 
  seventeen 
  years 
  ago. 
  It 
  formed 
  a 
  little 
  

   group 
  of 
  plants 
  growing 
  at 
  some 
  distance 
  from 
  

   the 
  main 
  body, 
  in 
  the 
  same 
  field. 
  I 
  found 
  some 
  

   rosettes 
  and 
  some 
  flowering 
  stems 
  and 
  sowed 
  

   some 
  seed 
  in 
  the 
  fall. 
  The 
  variety 
  has 
  been 
  

   quite 
  constant 
  in 
  the 
  field, 
  neither 
  increasing 
  

   in 
  number 
  of 
  individual 
  plants 
  nor 
  changing 
  

   its 
  place, 
  though 
  now 
  closely 
  surrounded 
  by 
  oth- 
  

   er 
  Lamarckianas. 
  In 
  my 
  garden 
  it 
  has 
  proved 
  

   to 
  be 
  constant 
  from 
  seed, 
  never 
  reverting 
  to 
  the 
  

   original 
  lamarckiana, 
  provided 
  intercrossing 
  

   was 
  excluded. 
  

  

  It 
  is 
  chiefly 
  distinguished 
  from 
  Lamarck's 
  

   evening-primrose 
  by 
  its 
  smooth 
  leaves, 
  as 
  the 
  

   name 
  indicates. 
  The 
  leaves 
  of 
  the 
  original 
  form 
  

   show 
  numerous 
  sinuosities 
  in 
  their 
  blades, 
  not 
  

   at 
  the 
  edge, 
  but 
  anywhere 
  between 
  the 
  veins. 
  

   The 
  blade 
  shows 
  numbers 
  of 
  convexities 
  on 
  

   either 
  surface, 
  the 
  whole 
  surface 
  being 
  undu- 
  

   lated 
  in 
  this 
  manner; 
  it 
  lacks 
  also 
  the 
  bright- 
  

   ness 
  of 
  the 
  ordinary 
  evening-primrose 
  or 
  

   Oenotlierd 
  biennis. 
  

  

  These 
  undulations 
  are 
  lacking 
  or 
  at 
  least 
  very 
  

   rare 
  on 
  the 
  leaves 
  of 
  the 
  new 
  laevifolia. 
  Or- 
  

   dinarily 
  they 
  are 
  wholly 
  wanting, 
  but 
  at 
  times 
  

   single 
  leaves 
  with 
  slight 
  manifestations 
  of 
  this 
  

  

  