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  Retrograde 
  Varieties 
  

  

  Constant 
  hybrids 
  have 
  been 
  raised 
  by 
  Mil- 
  

   lardet 
  between 
  several 
  species 
  of 
  strawberries. 
  

   He 
  combined 
  the 
  old 
  cultivated 
  forms 
  with 
  newly 
  

   discovered 
  types 
  from 
  American 
  localities. 
  

   They 
  ordinarily 
  showed 
  only 
  the 
  characteristics 
  

   of 
  one 
  of 
  their 
  parents 
  and 
  did 
  not 
  exhibit 
  any 
  

   new 
  combination 
  of 
  qualities, 
  but 
  they 
  came 
  

   true 
  to 
  this 
  type 
  in 
  the 
  second 
  and 
  later 
  gener- 
  

   ations. 
  

  

  In 
  the 
  genus 
  Anemone, 
  Janczewski 
  obtained 
  

   the 
  same 
  results. 
  Some 
  characters 
  of 
  course 
  

   may 
  split, 
  but 
  others 
  remain 
  constant, 
  and 
  

   when 
  only 
  such 
  are 
  present, 
  hybrid 
  races 
  result 
  

   with 
  new 
  combinations 
  of 
  characters, 
  which 
  are 
  

   as 
  constant 
  as 
  the 
  best 
  species 
  of 
  the 
  same 
  ge- 
  

   nus. 
  The 
  hybrids 
  of 
  Janczewski 
  were 
  quite 
  fer- 
  

   tile, 
  and 
  he 
  points 
  out 
  that 
  there 
  is 
  no 
  good 
  

   reason 
  why 
  they 
  should 
  not 
  be 
  considered 
  as 
  

   good 
  new 
  species. 
  If 
  they 
  had 
  not 
  been 
  pro- 
  

   duced 
  artificially, 
  but 
  found 
  in 
  the 
  wild 
  state, 
  

   their 
  origin 
  would 
  have 
  been 
  unknown, 
  and 
  there 
  

   can 
  be 
  no 
  doubt 
  that 
  they 
  would 
  have 
  been 
  de- 
  

   scribed 
  by 
  the 
  best 
  systematists 
  as 
  species 
  of 
  the 
  

   same 
  value 
  as 
  their 
  parents. 
  Such 
  is 
  especially 
  

   the 
  case 
  with 
  a 
  hybrid 
  between 
  Anemone 
  magel- 
  

   lanica 
  and 
  the 
  common 
  Anemone 
  sylvestris. 
  

  

  Starting 
  from 
  similar 
  considerations 
  Kerner 
  

   von 
  Marilaun 
  pointed 
  out 
  the 
  fact 
  long 
  ago 
  that 
  

   many 
  so-called 
  species, 
  of 
  rare 
  occurrence, 
  

  

  