﻿Mutations 
  in 
  Horticulture 
  605 
  

  

  tion 
  within 
  the 
  race 
  holds 
  a 
  prominent 
  place 
  in 
  

   agriculture, 
  where 
  it 
  is 
  known 
  by 
  the 
  imposing 
  

   term, 
  race-breeding. 
  

  

  Experience 
  and 
  methods 
  in 
  horticulture 
  differ 
  

   from 
  those 
  in 
  agriculture 
  in 
  many 
  points. 
  

   Garden- 
  varieties 
  have 
  been 
  tested 
  and 
  separated 
  

   for 
  a 
  long 
  time, 
  but 
  neither 
  vegetables 
  nor 
  

   flowers 
  are 
  known 
  to 
  exhibit 
  such 
  motley 
  groups 
  

   of 
  types 
  as 
  may 
  be 
  seen 
  in 
  large 
  forage 
  crops. 
  

  

  New 
  varieties 
  which 
  appear 
  from 
  time 
  to 
  time 
  

   may 
  be 
  ornamental 
  or 
  otherwise 
  in 
  flowers, 
  and 
  

   more 
  or 
  less 
  profitable 
  than 
  their 
  parents 
  in 
  

   vegetables 
  and 
  fruits. 
  In 
  either 
  case 
  the 
  dif- 
  

   ference 
  is 
  usually 
  striking, 
  or 
  if 
  not, 
  its 
  culture 
  

   would 
  be 
  unprofitable. 
  

  

  The 
  recognition 
  of 
  useful 
  new 
  varieties 
  being 
  

   thus 
  made 
  easy, 
  the 
  whole 
  attention 
  of 
  the 
  

   breeder 
  is 
  reduced 
  to 
  isolating 
  the 
  seeds 
  of 
  the 
  

   mutants 
  that 
  are 
  to 
  be 
  saved 
  and 
  sown 
  separate- 
  

   ly, 
  and 
  this 
  process 
  must 
  be 
  repeated 
  during 
  

   a 
  few 
  years, 
  in 
  order 
  to 
  produce 
  the 
  quantity 
  of 
  

   seed 
  that 
  is 
  needed 
  for 
  a 
  profitable 
  introduction 
  

   of 
  the 
  variety 
  into 
  commerce. 
  In 
  proportion 
  to 
  

   the 
  abundance 
  of 
  the 
  harvest 
  of 
  each 
  year 
  this 
  

   period 
  is 
  shorter 
  for 
  some 
  and 
  longer 
  for 
  other 
  

   species. 
  

  

  Isolation 
  in 
  practice 
  is 
  not 
  so 
  simple 
  nor 
  so 
  

   easy 
  an 
  affair 
  as 
  it 
  is 
  in 
  the 
  experimental 
  gar- 
  

   den. 
  Hence 
  we 
  have 
  constant 
  and 
  nearlv 
  un- 
  

  

  