﻿Five-leaved 
  Clover 
  353 
  

  

  tion 
  why 
  the 
  quinquefoliolate 
  variety 
  is 
  so 
  

   seldom 
  met 
  with 
  in 
  the 
  wild 
  state. 
  For 
  even 
  if 
  

   it 
  did 
  occur 
  more 
  often, 
  the 
  plants 
  would 
  hardly 
  

   find 
  circumstances 
  favorable 
  enough 
  for 
  the 
  

   full 
  development 
  of 
  their 
  varietal 
  character. 
  

   They 
  must 
  often 
  be 
  so 
  poor 
  in 
  anomalous 
  leaves 
  

   as 
  to 
  be 
  overlooked, 
  or 
  to 
  be 
  taken 
  for 
  instances 
  

   of 
  the 
  commonly 
  occurring 
  quadrifoliolate 
  

   leaves 
  and 
  therefore 
  as 
  not 
  indicating 
  the 
  true 
  

   variety. 
  

  

  In 
  the 
  beginning 
  of 
  my 
  discussion 
  I 
  have 
  as- 
  

   serted 
  the 
  existence 
  of 
  two 
  different 
  races 
  of 
  

   " 
  four-leaved 
  ' 
  clovers, 
  a 
  poor 
  one 
  and 
  a 
  rich 
  

   one, 
  and 
  have 
  insisted 
  on 
  a 
  sharp 
  distinction 
  be- 
  

   tween 
  them. 
  This 
  distinction 
  partly 
  depends 
  

   on 
  experiments 
  with 
  clover, 
  but 
  in 
  great 
  part 
  

   on 
  tests 
  with 
  other 
  plants. 
  The 
  previously 
  

   mentioned 
  circumstance, 
  that 
  clover 
  cannot 
  be 
  

   pollinated 
  on 
  a 
  sufficiently 
  large 
  scale 
  otherwise 
  

   than 
  by 
  insects, 
  prevents 
  trials 
  in 
  more 
  than 
  one 
  

   direction 
  at 
  the 
  same 
  time 
  and 
  in 
  the 
  same 
  

   garden. 
  For 
  this 
  reason 
  I 
  have 
  chosen 
  another 
  

   species 
  of 
  clover 
  to 
  be 
  able 
  to 
  give 
  proof 
  or 
  dis- 
  

   proof 
  of 
  the 
  assertion 
  quoted. 
  

  

  This 
  species 
  is 
  the 
  Italian, 
  or 
  crimson 
  clover, 
  

   which 
  is 
  sometimes 
  also 
  called 
  scarlet 
  clover 
  

   (Trifolium 
  incarnatum). 
  It 
  is 
  commonly 
  used 
  

   in 
  Europe 
  as 
  a 
  crop 
  on 
  less 
  fertile 
  soils 
  than 
  

   are 
  required 
  by 
  the 
  red 
  clover. 
  It 
  is 
  annual 
  

  

  