﻿578 
  Mutations 
  

  

  Are 
  we 
  to 
  assume 
  a 
  single 
  origin 
  for 
  all 
  the 
  

   representatives 
  of 
  such 
  a 
  variety, 
  as 
  we 
  have 
  

   done 
  customarily 
  for 
  all 
  the 
  representatives 
  of 
  

   a 
  wild 
  species 
  ? 
  Or 
  can 
  the 
  same 
  mutation 
  have 
  

   been 
  repeated 
  at 
  different 
  times 
  and 
  in 
  distant 
  

   localities? 
  If 
  a 
  distinct 
  mutation 
  from 
  a 
  given 
  

   species 
  is 
  once 
  possible, 
  why 
  should 
  it 
  not 
  occur 
  

   twice 
  or 
  thrice? 
  

  

  A 
  variety 
  which 
  seems 
  to 
  be 
  new 
  to 
  us 
  may 
  

   only 
  appear 
  so, 
  because 
  the 
  spot 
  where 
  it 
  grows 
  

   had 
  hitherto 
  escaped 
  observation. 
  Lychnis 
  

   preslii 
  is 
  a 
  smooth 
  variety 
  of 
  Lychnis 
  diurna 
  

   and 
  was 
  observed 
  for 
  the 
  first 
  time 
  in 
  the 
  year 
  

   1842 
  by 
  Sekera. 
  It 
  grew 
  abundantly 
  in 
  a 
  grove 
  

   near 
  Miinchengratz 
  in 
  southern 
  Hungary. 
  It 
  

   was 
  accompanied 
  by 
  the 
  ordinary 
  hairy 
  type 
  of 
  

   the 
  species. 
  Since 
  then 
  it 
  has 
  been 
  observed 
  to 
  

   be 
  quite 
  constant 
  in 
  the 
  same 
  locality, 
  and 
  some 
  

   specimens 
  have 
  been 
  collected 
  for 
  me 
  there 
  late- 
  

   ly 
  by 
  Dr. 
  N&mec, 
  of 
  Prague. 
  No 
  other 
  native 
  

   localities 
  of 
  this 
  variety 
  have 
  been 
  discovered, 
  

   and 
  there 
  can 
  be 
  no 
  doubt 
  that 
  it 
  must 
  have 
  

   arisen 
  from 
  the 
  ordinary 
  campion 
  near 
  the 
  spot 
  

   where 
  it 
  still 
  grows. 
  But 
  this 
  change 
  may 
  have 
  

   taken 
  place 
  some 
  years 
  before 
  the 
  first 
  discov- 
  

   ery, 
  or 
  perhaps 
  one 
  or 
  more 
  centuries 
  ago. 
  

   This 
  could 
  only 
  be 
  known 
  if 
  it 
  could 
  be 
  proved 
  

   that 
  the 
  locality 
  had 
  been 
  satisfactorily 
  investi- 
  

   gated 
  previously, 
  and 
  that 
  the 
  variety 
  had 
  not 
  

  

  