﻿Mutations 
  in 
  Horticulture 
  615 
  

  

  Ulmus 
  pedunculata. 
  One 
  of 
  the 
  seedlings 
  had 
  

   cut 
  leaves. 
  He 
  multiplied 
  it 
  by 
  grafting 
  and 
  

   gave 
  it 
  to 
  the 
  trade 
  under 
  the 
  name 
  of 
  U. 
  

   pedunculata 
  urticaefolia. 
  It 
  has 
  since 
  been 
  

   lost. 
  

  

  Laciniate 
  alders 
  seem 
  to 
  have 
  been 
  produced 
  

   by 
  mutation 
  at 
  sundry 
  times. 
  Mirbel 
  says 
  that 
  

   the 
  Alnus 
  glutinosa 
  laciniata 
  is 
  found 
  wild 
  in 
  

   Normandy 
  and 
  in 
  the 
  forests 
  of 
  Montrnorency 
  

   near 
  Paris. 
  A 
  similar 
  variety 
  has 
  been 
  met 
  

   with 
  in 
  a 
  nursery 
  near 
  Orleans 
  in 
  the 
  year 
  1855. 
  

   In 
  connection 
  with 
  this 
  discovery 
  some 
  discus- 
  

   sion 
  has 
  arisen 
  concerning 
  the 
  question 
  whether 
  

   it 
  was 
  probable 
  that 
  the 
  Orleans 
  strain 
  was 
  a 
  

   new 
  mutation, 
  or 
  derived 
  in 
  some 
  way 
  from 
  the 
  

   trees 
  cited 
  by 
  Mirbel. 
  Of 
  course, 
  as 
  always 
  in 
  

   such 
  cases, 
  any 
  doubt, 
  once 
  pronounced, 
  affects 
  

   the 
  importance 
  of 
  the 
  observation 
  for 
  all 
  time, 
  

   since 
  it 
  is 
  impossible 
  to 
  gather 
  sufficient 
  his- 
  

   torical 
  evidence 
  to 
  fully 
  decide 
  the 
  point. 
  The 
  

   same 
  variety 
  had 
  appeared 
  under 
  similar 
  cir- 
  

   cumstances 
  in 
  a 
  nursery 
  at 
  Lyons 
  previously 
  

   (1812). 
  

  

  Laciniated 
  maples 
  are 
  said 
  to 
  be 
  of 
  relatively 
  

   frequent 
  occurrence 
  in 
  nurseries, 
  among 
  seed- 
  

   lings 
  of 
  the 
  typical 
  species. 
  London 
  says 
  that 
  

   once 
  100 
  laciniated 
  seedlings 
  were 
  seen 
  to 
  orig- 
  

   inate 
  from 
  seed 
  of 
  some 
  normal 
  trees. 
  But 
  in 
  

   this 
  case 
  it 
  is 
  rather 
  probable 
  that 
  the 
  presumed 
  

  

  