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  Elementary 
  Species 
  

  

  the 
  compound 
  nature 
  of 
  so-called 
  species 
  of 
  

   cultivated 
  plants 
  seems 
  to 
  be 
  beyond 
  all 
  doubt, 
  

   and 
  its 
  practical 
  importance 
  is 
  quite 
  obvious. 
  

  

  Acclimatization 
  is 
  another 
  process, 
  which 
  is 
  

   largely 
  dependent 
  on 
  the 
  choice 
  of 
  adequate 
  

   varieties. 
  This 
  is 
  shown 
  on 
  a 
  large 
  scale 
  by 
  

   the 
  slow 
  and 
  gradual 
  dispersion 
  of 
  the 
  varieties 
  

   of 
  corn 
  in 
  this 
  country. 
  The 
  largest 
  types 
  are 
  

   limited 
  to 
  temperate 
  and 
  subtropical 
  regions, 
  

   while 
  the 
  varieties 
  capable 
  of 
  cultivation 
  in 
  

   more 
  northern 
  latitudes 
  are 
  smaller 
  in 
  size 
  and 
  

   stature 
  and 
  require 
  a 
  smaller 
  number 
  of 
  days 
  

   to 
  reach 
  their 
  full 
  development 
  from 
  seed 
  to 
  

   seed. 
  Northern 
  varieties 
  are 
  small 
  and 
  short 
  

   lived, 
  but 
  the 
  " 
  Forty-day-corn 
  " 
  or 
  " 
  Quaran- 
  

   tino 
  maize 
  : 
  is 
  recorded 
  to 
  have 
  existed 
  in 
  

   tropical 
  America 
  at 
  the 
  time 
  of 
  Columbus. 
  In 
  

   preference, 
  or 
  rather 
  to 
  the 
  entire 
  exclu- 
  

   sion 
  of 
  taller 
  varieties, 
  it 
  has 
  thriven 
  on 
  the 
  

   northern 
  boundaries 
  of 
  the 
  corn-growing 
  states 
  

   of 
  Europe 
  since 
  the 
  very 
  beginning 
  of 
  its 
  culti- 
  

   vation. 
  

  

  According 
  to 
  Naudin, 
  the 
  same 
  rule 
  prevails 
  

   with 
  melons, 
  cucumbers 
  and 
  gherkins, 
  and 
  other 
  

   instances 
  could 
  easily 
  be 
  given. 
  

  

  Referring 
  now 
  to 
  the 
  inferences 
  that 
  may 
  be 
  

   drawn 
  from 
  the 
  experience 
  of 
  the 
  breeders 
  in 
  

   order 
  to 
  elucidate 
  the 
  natural 
  processes, 
  we 
  will 
  

   return 
  to 
  the 
  whitlow-grasses 
  and 
  pansies. 
  

  

  