﻿54 
  Rydberg: 
  Notes 
  on 
  Rosaceae 
  

  

  i6. 
  Rosa 
  obovata 
  Raf. 
  

  

  The 
  first 
  one 
  to 
  give 
  a 
  good 
  description 
  of 
  this 
  species 
  was 
  

  

  ■ 
  

  

  Lindley, 
  who 
  described 
  it 
  in 
  his 
  monograph 
  under 
  the 
  name 
  

   i?. 
  laxa. 
  Unfortunately 
  this 
  name 
  was 
  preoccupied 
  by 
  R. 
  laxa 
  

   Retz., 
  for 
  which 
  reason 
  Sprengel 
  substituted 
  R. 
  Lindleyi, 
  also 
  a 
  

   homonym 
  or 
  rather 
  pseudo-homonym, 
  as 
  there 
  was 
  already 
  a 
  

   R. 
  Lindleyana 
  Tratt. 
  Mr. 
  Baker, 
  In 
  Miss 
  Willmott's 
  Genus 
  Rosa, 
  

   described 
  it 
  as 
  R. 
  hiimilis 
  grandiflora. 
  There 
  is, 
  however, 
  a 
  

   R. 
  grandiflora 
  Salisb., 
  so 
  the 
  name 
  is 
  not 
  available. 
  The 
  only 
  

   name 
  left 
  to 
  consider 
  is 
  R. 
  obovata 
  Raf. 
  Rafinesque^s 
  description, 
  

   in 
  this 
  case 
  as 
  usually, 
  is 
  far 
  from 
  satisfactory, 
  but 
  "the 
  single 
  

   large 
  flowers, 
  obovate 
  leaflets, 
  and 
  straight 
  prickles," 
  would 
  

   indicate 
  this 
  species. 
  In 
  many 
  respects 
  it 
  is 
  intermediate 
  be- 
  

   tween 
  R. 
  virginiana 
  and 
  R. 
  Carolina, 
  but 
  has 
  comparatively 
  broader 
  

   leaflets 
  than 
  either. 
  The 
  leaflets 
  are 
  rather 
  dull, 
  sometimes 
  

   somewhat 
  glaucous. 
  The 
  following 
  specimens 
  are 
  to 
  be 
  referred 
  

   to 
  It: 
  

  

  Maine: 
  Hudson, 
  Briggs; 
  Bangor, 
  0. 
  W. 
  Knight, 
  

  

  Massachusetts 
  

  

  M 
  earns 
  

  

  New 
  York: 
  Ithaca, 
  Coville, 
  Pearce; 
  Long 
  Beach, 
  Long 
  Island, 
  

   Bicknell; 
  Lake 
  Ronkonkoma, 
  Bicknell. 
  

  

  New 
  Jersey: 
  Bay 
  Head, 
  Ocean 
  County, 
  Mackenzie. 
  

  

  Nash 
  

  

  Missou 
  

  

  17. 
  Rosa 
  Carolina 
  L. 
  

  

  This 
  name 
  was 
  taken 
  up 
  in 
  the 
  North 
  American 
  Flora 
  for 
  the 
  

   plant 
  described 
  by 
  Linnaeus 
  in 
  the 
  first 
  edition 
  of 
  his 
  Species 
  

   Plantarum. 
  It 
  is 
  the 
  same 
  as 
  R. 
  humilis 
  Marsh, 
  and 
  R. 
  parviflora 
  

   Ehrh. 
  See 
  the 
  discussion 
  under 
  R. 
  palustris. 
  Wangenheim 
  

   described 
  it 
  under 
  the 
  name 
  R. 
  pennsylvanica, 
  and 
  Alichaux 
  

   ' 
  changed 
  the 
  form 
  of 
  the 
  name 
  to 
  R. 
  caroliniana. 
  It 
  appears 
  also 
  

   to 
  be 
  R. 
  pratensis 
  Raf. 
  The 
  rest 
  of 
  the 
  synonyms 
  are 
  easily 
  

  

  explained. 
  

  

  18. 
  Rosa-serrulata 
  Raf. 
  

  

  This 
  is 
  closely 
  related 
  to 
  the 
  preceding 
  species 
  and 
  has 
  usually 
  

   been 
  confused 
  with 
  It. 
  It 
  differs 
  in 
  the 
  double-toothed 
  leaflets, 
  

  

  