﻿Polycephalic 
  Poppies 
  393 
  

  

  is 
  to 
  be 
  considered 
  therefore 
  as 
  an 
  experimental 
  

   basis 
  for 
  such 
  expectations. 
  

  

  First 
  of 
  all 
  conies 
  the 
  question 
  how 
  many 
  in- 
  

   dividuals 
  are 
  to 
  be 
  grown 
  in 
  a 
  given 
  place. 
  

   When 
  sowing 
  plants 
  for 
  experimental 
  purposes 
  

   it 
  is 
  always 
  best 
  to 
  sow 
  in 
  rows, 
  and 
  to 
  give 
  as 
  

   few 
  seeds 
  to 
  each 
  row 
  as 
  possible, 
  so 
  as 
  to 
  in- 
  

   sure 
  all 
  necessary 
  space 
  to 
  the 
  young 
  plants. 
  

   On 
  the 
  other 
  hand 
  the 
  seeds 
  do 
  not 
  all 
  germi- 
  

   nate, 
  and 
  after 
  sowing 
  too 
  thinly, 
  gaps 
  may 
  ap- 
  

   pear 
  in 
  the 
  rows. 
  This 
  would 
  cause 
  not 
  only 
  a 
  

   loss 
  of 
  space 
  but 
  an 
  inequality 
  between 
  the 
  

   plants 
  in 
  later 
  life, 
  as 
  those 
  nearest 
  the 
  gaps 
  

   would 
  have 
  more 
  space 
  and 
  more 
  light, 
  and 
  a 
  

   larger 
  area 
  for 
  their 
  roots 
  than 
  those 
  growing 
  

   in 
  the 
  unbroken 
  rows. 
  Hence 
  the 
  necessity 
  of 
  

  

  V 
  

  

  using 
  large 
  quantities 
  of 
  seed 
  and 
  of 
  weeding 
  

   out 
  a 
  majority 
  of 
  young 
  plants 
  on 
  the 
  spots 
  

   where 
  the 
  greatest 
  numbers 
  germinate. 
  

  

  Crowded 
  cultures 
  as 
  a 
  rule, 
  will 
  give 
  weak 
  

   plants 
  with 
  thin 
  stems, 
  mostly 
  unbranched 
  and 
  

   bearing 
  only 
  small 
  capsules. 
  According 
  to 
  this 
  

   rule, 
  these 
  will 
  produce 
  imperfect 
  crowns 
  of 
  sec- 
  

   ondary 
  pistils. 
  The 
  result 
  of 
  any 
  culture 
  will 
  

   thus 
  be 
  dependent 
  to 
  a 
  high 
  degree 
  on 
  the 
  num- 
  

   ber 
  of 
  individuals 
  per 
  square 
  meter. 
  I 
  have 
  

   sown 
  two 
  similar 
  and 
  neighboring 
  beds 
  with 
  

   the 
  thoroughly 
  mixed 
  seeds 
  of 
  parent-plants 
  of 
  

   the 
  same 
  strain 
  and 
  culture, 
  using 
  as 
  much 
  

  

  