﻿Rydberg: 
  Notes 
  on 
  Rosaceae 
  49 
  

  

  7, 
  Rosa 
  micrantha 
  Borrer 
  

  

  This 
  IS 
  often 
  mistaken 
  for 
  R. 
  nihiginosa 
  but 
  differs 
  in 
  the 
  less 
  

   rounded 
  leaflets, 
  the 
  more 
  ellipsoid 
  fruit, 
  the 
  more 
  deciduous 
  

   sepals, 
  the 
  smaller 
  petals, 
  and 
  the 
  almost 
  glabrous 
  styles. 
  The 
  

   following 
  specimens 
  belong 
  to 
  it: 
  

  

  Massachusetts: 
  Manchester, 
  Chamberlain; 
  Ipswich, 
  Morong. 
  

   New 
  York: 
  Oak 
  Point, 
  Burnham 
  77; 
  High 
  Bridge, 
  Elizabeth 
  

   Knight; 
  Fort 
  Lee, 
  Torrey 
  Botanical 
  Club. 
  

  

  New 
  Jersey: 
  Rocky 
  Hill, 
  Lighthipe; 
  Great 
  Notch, 
  Nash 
  1036, 
  

  

  Maryland: 
  Rush 
  River, 
  Shidl 
  347. 
  

  

  Virginia: 
  Bedford, 
  A, 
  H. 
  Curtiss. 
  

  

  8. 
  Rosa 
  dumetorum 
  Thuill. 
  

  

  Closely 
  resembling 
  the 
  Dog 
  Rose 
  but 
  with 
  the 
  leaves 
  pubes- 
  

   cent 
  beneath. 
  The 
  only 
  record 
  of 
  this 
  species 
  from 
  America 
  is 
  

   one 
  from 
  Bowling 
  Green, 
  Kentucky. 
  This 
  might 
  have 
  been 
  an 
  

   escape 
  from 
  cultivation. 
  

  

  9. 
  Rosa 
  canina 
  L. 
  

  

  The 
  Dog 
  Rose 
  is 
  well 
  understood, 
  though 
  it 
  is 
  only 
  sparingly 
  

   naturalized 
  in 
  the 
  Northeastern 
  States. 
  

  

  V. 
  CAROLINAE 
  

  

  Hypanthium 
  globose 
  or 
  short-ellipsoid, 
  rounded 
  or 
  barely 
  

  

  acute 
  at 
  the 
  base. 
  

   Infrastipular 
  prickles 
  decidedly 
  curved. 
  

  

  Leaflets 
  finely 
  serrulate, 
  elliptic 
  or 
  oblanceolate; 
  

  

  prickles 
  short 
  and 
  stout. 
  

  

  Leaflets 
  mostly 
  7; 
  flowers 
  usually 
  corymbose 
  on 
  

   erect 
  branches; 
  fruit 
  depressed-globose, 
  about 
  

  

  12 
  mm. 
  thick. 
  

  

  Leaflets 
  mostly 
  5; 
  flowers 
  usually 
  solitary 
  or 
  two 
  

  

  together 
  on 
  spreading 
  branches; 
  fruit 
  ellipsoid. 
  

  

  10. 
  R. 
  pdlustris. 
  

  

  acute 
  at 
  the 
  base, 
  8-9 
  mm. 
  thick. 
  11. 
  R. 
  dasislema 
  

  

  Leaflets 
  coarsely 
  serrate, 
  oval 
  or 
  obovate. 
  

  

  Leaflets 
  not 
  shining; 
  prickles 
  short 
  and 
  weak. 
  

  

  r 
  

  

  Leaflets 
  obovate; 
  fruit 
  10-12 
  mm. 
  in 
  diameter/ 
  12. 
  R. 
  gemella. 
  

  

  Leaflets 
  oblanceolate; 
  fruit 
  7-10 
  mm. 
  in 
  

  

  diameter. 
  

  

  13- 
  R, 
  nanella. 
  

  

  Leaflets 
  shining; 
  prickles 
  long 
  and 
  stoat. 
  14. 
  R. 
  virginiana 
  

  

  ^j 
  

  

  Infrastipular 
  prickles 
  straight 
  or 
  slightly 
  curved. 
  

  

  Leaflets 
  

  

  (in 
  R, 
  virginiana 
  rarely 
  9). 
  

  

  