﻿6 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  and 
  therefore 
  the 
  specimens 
  from 
  them 
  are 
  too 
  incomplete 
  to 
  be 
  

   satisfactory. 
  These 
  places 
  must 
  be 
  again 
  visited 
  earlier 
  in 
  the 
  

   season 
  in 
  order 
  to 
  get 
  flowering 
  specimens. 
  Those 
  who 
  have 
  made 
  

   a 
  special 
  study 
  of 
  these 
  trees 
  and 
  shrubs 
  and 
  have 
  recently 
  pub- 
  

   lished 
  many 
  new 
  species 
  have 
  given 
  specific 
  value 
  to 
  such 
  charac- 
  

   ters 
  as 
  require 
  a 
  very 
  complete 
  set 
  of 
  specimens 
  to 
  make 
  the 
  

   identification 
  certain 
  and 
  satisfactory. 
  There 
  are 
  also 
  some 
  

   characters 
  that 
  are 
  not 
  well 
  shown 
  by 
  the 
  dried 
  specimens 
  and 
  

   in 
  order 
  to 
  make 
  these 
  available 
  notes 
  must 
  be 
  taken 
  of 
  them 
  at 
  

   the 
  time 
  the 
  specimens 
  are 
  collected. 
  The 
  number 
  of 
  species 
  

   recently 
  described 
  is 
  so 
  great 
  that 
  it 
  seems 
  very 
  probable 
  that 
  

   mere 
  varieties 
  and 
  perhaps 
  mere 
  forms 
  have 
  been 
  in 
  some 
  cases 
  

   described 
  as 
  species. 
  But 
  error 
  in 
  this 
  direction 
  may 
  have 
  a 
  ten- 
  

   dency 
  to 
  stimulate 
  closer 
  observation 
  on 
  the 
  part 
  of 
  others 
  in 
  

   their 
  efforts 
  to 
  recognize 
  the 
  fine 
  distinctions 
  made 
  and 
  may 
  in 
  the 
  

   end 
  be 
  productive 
  of 
  better 
  results 
  than 
  error 
  in 
  the 
  other 
  direc- 
  

   tion 
  would 
  be. 
  According 
  to 
  the 
  present 
  understanding 
  of 
  these 
  

   plants 
  the 
  number 
  of 
  species 
  of 
  Crataegus 
  added 
  to 
  our 
  flora 
  is 
  

   19. 
  They 
  are 
  specially 
  noticed 
  in 
  a 
  part 
  of 
  the 
  report 
  marked 
  F. 
  

   A 
  supplementary 
  list 
  of 
  plants 
  of 
  the 
  Susquehanna 
  valley 
  is 
  

   marked 
  G. 
  It 
  is 
  composed 
  of 
  the 
  names 
  and 
  annotations 
  of 
  

   species 
  detected 
  since 
  the 
  previous 
  list 
  was 
  written 
  and 
  of 
  species 
  

   accidentally 
  omitted 
  from 
  that 
  list. 
  It 
  includes 
  about 
  30 
  species. 
  

  

  Respectfully 
  submitted 
  

  

  Charles 
  H. 
  Peck 
  

   Albany, 
  Dec. 
  2, 
  1903 
  

  

  