﻿62 
  Rydberg: 
  Notes 
  on 
  Rosaceae 
  

  

  received 
  later, 
  which 
  are 
  in 
  the 
  herbarium 
  of 
  the 
  New 
  York 
  Bo- 
  

   tanical 
  Garden, 
  do 
  not 
  resemble 
  R. 
  palustris 
  so 
  much, 
  but 
  the 
  dis- 
  

   tinctive 
  characters 
  are 
  there. 
  Besides 
  the 
  Green 
  Bay 
  specimens, 
  

   there 
  Is 
  also 
  one 
  from 
  Neenah. 
  Wisconsin. 
  

  

  VII. 
  PIMPINELLIFOLIAE 
  

  

  One 
  species. 
  

  

  33. 
  R. 
  pimpinelllfolia 
  

  

  33. 
  Rosa 
  pimpinellifolia 
  L. 
  

  

  As 
  stated 
  before, 
  Linnaeus 
  included 
  this 
  species 
  under 
  R. 
  

   spinosissima 
  in 
  the 
  first 
  edition 
  of 
  the 
  Species 
  plantarum, 
  but 
  it 
  

   IS 
  not 
  the 
  type 
  of 
  it. 
  See 
  the 
  remarks 
  under 
  R. 
  spinosissima. 
  

   Many 
  recent 
  authors 
  have 
  readopted 
  the 
  name 
  R. 
  pimpinelliJoUa 
  

   for 
  the 
  present 
  species. 
  I 
  am 
  glad 
  that 
  the 
  latter 
  name, 
  which 
  

   has 
  been 
  in 
  use 
  for 
  this 
  species 
  during 
  a 
  hundred 
  and 
  fifty 
  years, 
  

   is 
  to 
  be 
  taken 
  up 
  again. 
  

  

  R. 
  pimpinellifolia 
  is 
  extensively 
  cultivated 
  and 
  has 
  escaped 
  in 
  

   many 
  places. 
  It 
  has 
  been 
  mistaken 
  for 
  a 
  native 
  more 
  than 
  once. 
  

   Pursh 
  described 
  it 
  as 
  R. 
  lutescens, 
  and 
  lately 
  E. 
  G. 
  Baker 
  has 
  given 
  

   it 
  another 
  name, 
  R. 
  illinoensis. 
  The 
  latter 
  was 
  based 
  on 
  speci- 
  

   mens 
  collected, 
  according 
  to 
  Baker, 
  by 
  Green, 
  Lansing 
  and 
  Dixon 
  

   at 
  La 
  Salle, 
  Illinois. 
  There 
  is 
  a 
  sheet 
  in 
  the 
  herbarium 
  of 
  the 
  

   New 
  York 
  Botanical 
  G^rdpn 
  (-r.ll^r-ff.r1 
  U^r 
  n^^^r,^^^ 
  r„^+ 
  r^r-^onl 
  

  

  pinosissima 
  

  

  Lansing 
  and 
  Dixon. 
  Baker 
  distinguished 
  it 
  from 
  R. 
  

   (I.e., 
  from 
  R. 
  pimpinellifolia) 
  -by 
  the 
  smaller 
  numbe 
  

   only 
  seven 
  and 
  by 
  the 
  upper 
  prickles 
  being 
  paired 
  under 
  the 
  leaves. 
  

   In 
  our 
  specimens, 
  some 
  leaves 
  have 
  nine 
  leaflets, 
  while 
  some 
  of 
  the 
  

   upper 
  leaves 
  have 
  only 
  three 
  or 
  five. 
  We 
  have 
  also 
  some 
  speci- 
  

   mens 
  from 
  England 
  and 
  Scandinavia, 
  which 
  do 
  not 
  have 
  more 
  than 
  

   seven 
  leaflets. 
  The 
  arrangement 
  of 
  paired 
  Infrastlpular 
  prickles, 
  

   I 
  think, 
  was 
  only 
  incidental, 
  for 
  our 
  specimens, 
  duplicates 
  of 
  the 
  

  

  type 
  

  

  R. 
  illinoensis 
  is 
  nothing 
  

  

  but 
  the 
  escape 
  of 
  one 
  of 
  the 
  numerous 
  cultivated 
  forms 
  of 
  F. 
  

  

  pimpinellifolia. 
  The 
  following 
  American 
  species 
  belong 
  to 
  this 
  

   species 
  : 
  

  

  Vermont: 
  Joh 
  

  

  bough, 
  Macotin 
  34752. 
  

   County, 
  Greenman, 
  Lansins 
  & 
  

  

  