﻿472 
  Mutations 
  

  

  ters 
  have 
  as 
  yet 
  not 
  been 
  ascertained 
  in 
  the 
  case 
  

   of 
  our 
  toad-flax. 
  

  

  In 
  order 
  to 
  save 
  seed 
  from 
  isolated 
  plants 
  it 
  is 
  

   necessary, 
  for 
  this 
  reason, 
  to 
  have 
  at 
  least 
  two 
  

   individuals, 
  and 
  these 
  must 
  belong 
  to 
  the 
  two 
  

   physiologically 
  different 
  types. 
  Now 
  in 
  the 
  

   year 
  1892, 
  as 
  in 
  other 
  years, 
  my 
  plants, 
  though 
  

   separated 
  at 
  the 
  outset 
  by 
  distances 
  of 
  about 
  20 
  

   cm. 
  from 
  each 
  other, 
  threw 
  out 
  roots 
  of 
  far 
  

   greater 
  length, 
  growing 
  in 
  such 
  a 
  way 
  as 
  to 
  

   abolish 
  the 
  strict 
  isolation 
  of 
  the 
  individuals. 
  

   Any 
  plot 
  may 
  produce 
  several 
  stems 
  from 
  such 
  

   roots, 
  and 
  it 
  is 
  manifestly 
  impossible 
  to 
  decide 
  

   whether 
  they 
  all 
  belong 
  to 
  one 
  original 
  plant 
  or 
  

   to 
  the 
  mixed 
  roots 
  of 
  several 
  individuals. 
  No 
  

   other 
  strains 
  were 
  grown 
  on 
  the 
  same 
  bed 
  with 
  

   my 
  plants 
  however, 
  and 
  so 
  I 
  considered 
  all 
  the 
  

   stems 
  of 
  the 
  little 
  group 
  as 
  belonging 
  to 
  one 
  

   plant. 
  But 
  their 
  perfect 
  fertility 
  showed, 
  ac- 
  

   cording 
  to 
  the 
  experience 
  described, 
  that 
  there 
  

   must 
  have 
  been 
  at 
  least 
  two 
  specimens 
  mingled 
  

   together. 
  

  

  Returning 
  now 
  to 
  the 
  seeds 
  of 
  this 
  pair 
  of 
  

   plants, 
  I 
  had, 
  of 
  course, 
  not 
  the 
  least 
  occasion 
  

   to 
  ascribe 
  to 
  it 
  any 
  higher 
  value 
  than 
  the 
  har- 
  

   vest 
  of 
  former 
  years. 
  The 
  consequence 
  was 
  

   that 
  I 
  had 
  no 
  reason 
  to 
  make 
  large 
  sowings, 
  and 
  

   grew 
  only 
  enough 
  young 
  plants 
  to 
  have 
  about 
  

   50 
  in 
  bloom 
  in 
  the 
  summer 
  of 
  1894. 
  Among 
  

  

  