﻿592 
  Mutations 
  

  

  organs, 
  in 
  size, 
  in 
  the 
  diameter 
  of 
  the 
  stems, 
  

   which 
  were 
  woody 
  in 
  some 
  and 
  more 
  fleshy 
  in 
  

   others, 
  in 
  the 
  shape 
  of 
  the 
  foliage 
  and 
  in 
  the 
  

   flowers. 
  More 
  than 
  twenty 
  types 
  could 
  be 
  dis- 
  

   tinguished 
  and 
  seeds 
  were 
  saved 
  from 
  a 
  num- 
  

   ber 
  of 
  them, 
  in 
  order 
  to 
  ascertain 
  whether 
  they 
  

   are 
  constant, 
  or 
  whether 
  perhaps 
  a 
  main 
  stem 
  in 
  

   a 
  mutating 
  condition 
  might 
  be 
  found 
  among 
  

   them. 
  If 
  this 
  should 
  prove 
  to 
  be 
  the 
  case, 
  the 
  

   relations 
  between 
  the 
  observed 
  forms 
  would 
  

   probably 
  be 
  analogous 
  to 
  those 
  between 
  the 
  0. 
  

   lamarckiana 
  and 
  its 
  derivatives. 
  

  

  Many 
  other 
  varieties 
  have 
  sprung 
  from 
  the 
  

   type-species 
  under 
  similar 
  conditions 
  from 
  time 
  

   to 
  time. 
  A 
  fern-leaved 
  mercury, 
  Mercurialis 
  

   annua 
  laciniata, 
  was 
  discovered 
  in 
  the 
  year 
  1719 
  

   by 
  Marchant. 
  The 
  type 
  was 
  quite 
  new 
  at 
  the 
  

   time 
  and 
  maintained 
  itself 
  during 
  a 
  series 
  of 
  

   years. 
  The 
  yellow 
  deadly 
  nightshade 
  or 
  Atropa 
  

   Belladonna 
  lutea 
  was 
  found 
  about 
  1850 
  in 
  the 
  

   Black 
  Forest 
  in 
  Germany 
  in 
  a 
  single 
  spot, 
  and 
  

   has 
  since 
  been 
  multiplied 
  by 
  seeds. 
  It 
  is 
  now 
  

   dispersed 
  in 
  botanical 
  gardens, 
  and 
  seems 
  to 
  be 
  

   quite 
  constant. 
  A 
  dwarf 
  variety 
  of 
  a 
  bean, 
  

   Phaseolus 
  lunatus, 
  was 
  observed 
  to 
  spring 
  from 
  

   the 
  ordinary 
  type 
  by 
  a 
  sudden 
  leap 
  about 
  1895 
  

   by 
  W. 
  W. 
  Tracy, 
  and 
  many 
  similar 
  cases 
  could 
  

   be 
  given. 
  

  

  The 
  annual 
  habit 
  is 
  not 
  verv 
  favorable 
  for 
  

  

  