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  Mutations 
  

  

  view, 
  as 
  they 
  are 
  divergent 
  in 
  other 
  respects. 
  

   It 
  would 
  be 
  superfluous 
  to 
  dwell 
  any 
  longer 
  

   upon 
  the 
  difference 
  between 
  heads 
  and 
  flowers. 
  

   But 
  it 
  is 
  as 
  well 
  to 
  point 
  out, 
  that 
  the 
  term 
  dou- 
  

   ble 
  flowers 
  indicates 
  a 
  motley 
  assemblage 
  of 
  dif- 
  

   ferent 
  phenomena. 
  The 
  hen-and-chicken 
  daisy, 
  

   and 
  the 
  corresponding 
  variety 
  of 
  the 
  garden- 
  

   cineraria 
  (Cineraria 
  cruenta), 
  are 
  extremes 
  on 
  

   one 
  side. 
  The 
  hen-and-chicken 
  type 
  occurs 
  

   even 
  in 
  other 
  families 
  and 
  is 
  known 
  to 
  produce 
  

   most 
  curious 
  anomalies, 
  as 
  with 
  Scabiosa, 
  the 
  

   supernumerary 
  heads 
  of 
  which 
  may 
  be 
  pro- 
  

   duced 
  on 
  long 
  stalks 
  and 
  become 
  branched 
  

   themselves 
  in 
  the 
  same 
  manner. 
  

  

  Petalody 
  of 
  the 
  stamens 
  is 
  well 
  known 
  to 
  be 
  

   the 
  ordinary 
  type 
  of 
  doubling. 
  But 
  it 
  is 
  often 
  

   accompanied 
  by 
  a 
  multiplication 
  of 
  the 
  organs, 
  

   both 
  of 
  the 
  altered 
  stamens 
  and 
  of 
  the 
  petals 
  

   themselves. 
  This 
  proliferation 
  may 
  consist 
  in 
  

   median 
  or 
  in 
  lateral 
  cleavages, 
  and 
  in 
  both 
  

   cases 
  the 
  process 
  may 
  be 
  repeated 
  one 
  or 
  more 
  

   times. 
  It 
  would 
  be 
  quite 
  superfluous 
  to 
  give 
  

   more 
  details, 
  which 
  may 
  be 
  gathered 
  from 
  any 
  

   morphologic 
  treatise 
  on 
  double 
  flowers. 
  But 
  

   from 
  the 
  physiologic 
  point 
  of 
  view 
  all 
  these 
  

   cases 
  are 
  to 
  be 
  considered 
  as 
  one 
  large 
  group, 
  

   complying 
  with 
  previously 
  given 
  definitions 
  of 
  

   the 
  ever-sporting 
  varieties. 
  They 
  are 
  very 
  va- 
  

   riable 
  and 
  wholly 
  permanent, 
  Obviously 
  this 
  

  

  