﻿Origin 
  of 
  Wild 
  Species 
  593 
  

  

  the 
  discovery 
  of 
  new 
  forms 
  in 
  the 
  wild 
  state. 
  

   New 
  varieties 
  may 
  appear, 
  but 
  may 
  be 
  crowded 
  

   out 
  the 
  first 
  year. 
  The 
  chances 
  are 
  much 
  

   greater 
  with 
  perennials, 
  and 
  still 
  greater 
  with 
  

   shrubs 
  or 
  trees. 
  A 
  single 
  aberrant 
  specimen 
  

   may 
  live 
  for 
  years 
  and 
  even 
  for 
  centuries, 
  and 
  

   under 
  such 
  conditions 
  is 
  pretty 
  sure 
  to 
  be 
  dis- 
  

   covered 
  sooner 
  or 
  later. 
  Hence 
  it 
  is 
  no 
  won- 
  

   der 
  that 
  many 
  such 
  cases 
  are 
  on 
  record. 
  They 
  

   have 
  this 
  in 
  common 
  that 
  the 
  original 
  plant 
  

   of 
  the 
  variety 
  has 
  been 
  found 
  among 
  a 
  vast 
  

   majority 
  of 
  representatives 
  of 
  the 
  correspond- 
  

   ing 
  species. 
  Nothing 
  of 
  course 
  is 
  directly 
  

   known 
  about 
  its 
  origin. 
  Intermediate 
  links 
  

   have 
  as 
  a 
  rule 
  been 
  wanting, 
  and 
  the 
  seeds, 
  

   which 
  have 
  often 
  been 
  sown, 
  have 
  not 
  yielded 
  

   reliable 
  results, 
  as 
  no 
  care 
  was 
  taken 
  to 
  pre- 
  

   serve 
  the 
  blossoms 
  from 
  intercrossing 
  with 
  their 
  

   parent-forms. 
  

  

  Stress 
  should 
  be 
  laid 
  upon 
  one 
  feature 
  of 
  

   these 
  curious 
  occurrences. 
  Eelatively 
  often 
  

   the 
  same 
  novelty 
  has 
  been 
  found 
  twice 
  or 
  thrice, 
  

   or 
  even 
  more 
  frequently, 
  and 
  under 
  conditions 
  

   which 
  make 
  it 
  very 
  improbable 
  that 
  any 
  relation 
  

   between 
  such 
  occurrences 
  might 
  exist. 
  The 
  

   same 
  mutation 
  must 
  have 
  taken 
  place 
  more 
  than 
  

   once 
  from 
  the 
  same 
  main 
  stem. 
  

  

  The 
  most 
  interesting 
  of 
  these 
  facts 
  are 
  con- 
  

   nected 
  with 
  the 
  origin 
  of 
  the 
  purple 
  beech, 
  which 
  

  

  