﻿Experimental 
  Pedigree-Cultures 
  575 
  

  

  suit 
  the 
  requirements 
  of 
  the 
  new 
  species 
  rubri- 
  

   nervis 
  and 
  gig 
  as. 
  

  

  NOTE. 
  Oenotheras 
  are 
  native 
  to 
  America 
  and 
  all 
  

   of 
  the 
  species 
  growing 
  in 
  Europe 
  have 
  escaped 
  from 
  

   gardens 
  directly, 
  or 
  may 
  have 
  arisen 
  by 
  mutation, 
  or 
  

   by 
  hybridization 
  of 
  introduced 
  species. 
  A 
  fixed 
  

   hybrid 
  between 
  0. 
  cruciata 
  and 
  0. 
  biennis 
  constituting 
  

   a 
  species 
  has 
  been 
  in 
  cultivation 
  for 
  many 
  years. 
  

   The 
  form 
  known 
  as 
  0. 
  biennis 
  in 
  Europe, 
  and 
  used 
  

   by 
  de 
  Vries 
  in 
  all 
  of 
  the 
  experiments 
  described 
  in 
  these 
  

   lectures, 
  has 
  not 
  yet 
  been 
  found 
  growing 
  wild 
  in 
  

   America 
  and 
  is 
  not 
  identical 
  with 
  the 
  species 
  bearing 
  

   that 
  name 
  among 
  American 
  botanists. 
  Concerning 
  

   this 
  matter 
  Professor 
  de 
  Vries 
  writes 
  under 
  date 
  of 
  

   Sept. 
  12, 
  1905: 
  "The 
  'biennis' 
  which 
  I 
  collected 
  in 
  

   America 
  has 
  proved 
  to 
  be 
  a 
  motley 
  collection 
  of 
  forms, 
  

   which 
  at 
  that 
  time 
  I 
  had 
  no 
  means 
  of 
  distinguishing. 
  

   No 
  one 
  of 
  them, 
  so 
  far 
  as 
  they 
  are 
  now 
  growing 
  in 
  

   my 
  garden 
  is 
  identical 
  with 
  our 
  biennis 
  of 
  the 
  sand 
  

   dunes.' 
  The 
  same 
  appears 
  to 
  be 
  the 
  case 
  with 
  

   0. 
  muricata. 
  Plants 
  from 
  the 
  Northeastern 
  American 
  

   seaboard, 
  identifiable 
  with 
  the 
  species 
  do 
  not 
  entirely 
  

   agree 
  with 
  those 
  raised 
  from 
  seed 
  received 
  from 
  

   Holland. 
  

  

  0. 
  LamarcJciana 
  has 
  not 
  been 
  found 
  growing 
  wild 
  

   in 
  America 
  in 
  recent 
  years 
  although 
  the 
  evidence 
  at 
  

   hand 
  seems 
  to 
  favor 
  the 
  conclusion 
  that 
  it 
  was 
  seen 
  

   and 
  collected 
  in 
  the 
  southern 
  states 
  in 
  the 
  last 
  century. 
  

   (See 
  MacDougal, 
  Vail, 
  Shull, 
  and 
  Small. 
  Mutants 
  

   and 
  Hybrids 
  of 
  the 
  Oenotheras. 
  Publication 
  24. 
  

   Carnegie 
  Institution. 
  Washington, 
  D. 
  C., 
  1905.) 
  

  

  EDITOR. 
  

  

  