﻿Rydberg: 
  Notes 
  on 
  Rosaceae 
  53 
  

  

  It 
  is 
  therefore 
  plain 
  that 
  R. 
  virginiana 
  Mill, 
  is 
  the 
  oldest 
  name 
  

   for 
  the 
  rose 
  usually 
  known 
  as 
  R. 
  lucida 
  Ehrh, 
  To 
  me 
  It 
  seems 
  that 
  

   R. 
  carolinensis 
  Marsh, 
  applies 
  better 
  to 
  this 
  species 
  than 
  does 
  

  

  r 
  

  

  either 
  of 
  the 
  two 
  species 
  described 
  by 
  Linnaeus 
  under 
  the 
  name 
  

   of 
  R. 
  Carolina. 
  R. 
  rapa 
  Bosc 
  is 
  apparently 
  a 
  double 
  form 
  of 
  this 
  

  

  species. 
  

  

  Mr. 
  Best 
  reduced 
  this 
  species 
  to 
  a 
  variety 
  of 
  R. 
  humilis. 
  He 
  

  

  had 
  collected 
  a 
  great 
  number 
  of 
  rose-specimens 
  in 
  New 
  Jersey. 
  

   Some 
  of 
  these 
  were 
  presented 
  to 
  Columbia 
  Universitj^ 
  These 
  

   show 
  many 
  gradations 
  between 
  R. 
  lucida 
  Ehrh. 
  and 
  R. 
  humilis 
  

   Marsh, 
  (i.e., 
  the 
  original 
  R. 
  Carolina 
  L.), 
  and 
  also 
  between 
  these 
  

   and 
  another 
  form, 
  R. 
  humilis 
  villosa 
  Best 
  (R. 
  Lyoni 
  Pursh). 
  

   Best 
  concluded 
  that 
  all 
  should 
  be 
  regarded 
  as 
  a 
  single 
  variable 
  

   species. 
  He 
  has 
  been 
  followed 
  by 
  N. 
  L. 
  Britton 
  and 
  C. 
  K. 
  

   Schneider, 
  the 
  latter 
  using 
  the 
  name 
  R. 
  virginiana 
  lucida 
  Best. 
  

   I 
  doubt 
  if 
  Best 
  ever 
  used 
  said 
  combination, 
  at 
  least 
  in 
  print. 
  

   In 
  my 
  opinion 
  several 
  of 
  Mr. 
  Best's 
  specimens 
  are 
  of 
  hybrid 
  

   origin, 
  and 
  this 
  circumstance 
  would 
  give 
  a 
  satisfactory 
  explanation 
  

   for 
  the 
  intergradation, 
  which 
  is 
  rarely 
  met 
  with 
  elsewhere. 
  

  

  Rosa 
  blanda 
  Willmottiana 
  Baker, 
  according 
  to 
  the 
  figure, 
  has 
  

   nothing 
  to 
  do 
  with 
  R. 
  blanda, 
  but 
  belongs 
  without 
  doubt 
  to 
  R. 
  

  

  vtrgtmana 
  

  

  15. 
  Rosa 
  Lyoni 
  Pursh 
  

  

  A 
  species 
  which 
  has 
  been 
  confused 
  with 
  both 
  R. 
  virgimuna 
  

   Mill. 
  {R. 
  lucida 
  Ehrh.) 
  and 
  R. 
  Carolina 
  L. 
  {R. 
  humilis 
  Marsh.), 
  

   but 
  which 
  differs 
  from 
  both 
  in 
  having 
  the 
  leaves 
  densely 
  pubescent 
  

   beneath. 
  In 
  general 
  habit 
  and 
  in 
  the 
  sepals 
  and 
  the 
  prickles, 
  

   it 
  resembles 
  most 
  the 
  latter, 
  but 
  the 
  leaflets 
  are 
  much 
  broader 
  and 
  

   the 
  flowers 
  are 
  as 
  large 
  as 
  in 
  R. 
  virginiana. 
  The 
  flowers 
  are 
  also 
  

   more 
  inclined 
  to 
  be 
  corymbose 
  than 
  in 
  R. 
  Carolina. 
  R. 
  Lyoni 
  is 
  a 
  

   more 
  western 
  snecies, 
  receiving 
  its 
  best 
  development 
  in 
  Missouri, 
  

  

  Jersey 
  

  

  mbces 
  with 
  the 
  tw^o 
  species 
  mentioned 
  

  

  them. 
  See 
  remarks 
  under 
  R. 
  virginiana. 
  R. 
  Lyoni 
  is 
  apparently 
  

  

  pnsilla 
  Raf., 
  R. 
  lucida 
  

  

  villosa 
  Best. 
  

  

  