﻿56 
  

  

  Rydberg: 
  Notes 
  on 
  Rosaceae 
  

  

  Hj^panthium 
  subglobose, 
  without 
  a 
  neck. 
  

  

  Leaflets 
  glandular-granuliferous 
  and 
  pubes- 
  

   cent 
  beneath; 
  fruit 
  1.5 
  cm. 
  thick. 
  

   Leaflets 
  villous 
  beneath; 
  fruit 
  about 
  i 
  cm. 
  

   thick. 
  

   Leaflets 
  thick, 
  strongly 
  reticulate, 
  and 
  rugose; 
  

   branches 
  and 
  even 
  the 
  prickles 
  pubescent. 
  

   Stem 
  unarmed 
  or 
  when 
  young 
  covered 
  with 
  more 
  or 
  

  

  less 
  deciduous 
  bristles. 
  

   Sepals 
  erect 
  or 
  connivent 
  in 
  fruit. 
  

  

  L 
  

  

  Leaflets 
  decidedly 
  but 
  finely 
  pubescent 
  be- 
  

   neath. 
  

  

  Leaflets 
  glabrous 
  on 
  both 
  sides, 
  shining. 
  

   Sepals 
  reflexed 
  in 
  fruit. 
  

  

  Leaflets 
  decidedly 
  puberulent 
  or 
  short-pilose; 
  

  

  24. 
  R. 
  Bourgeaniana 
  

  

  25. 
  R. 
  acicularioides 
  

  

  26. 
  -R. 
  riigosa. 
  

  

  27. 
  R. 
  blanda, 
  

  

  28. 
  R. 
  subblanda. 
  

  

  sepals 
  9-15 
  mm. 
  long; 
  petals 
  1.7-2 
  cm. 
  long. 
  29. 
  R, 
  Williamsiu 
  

   Leaflets 
  glabrous 
  or 
  nearly 
  so; 
  sepals 
  2-5 
  cm. 
  

  

  30. 
  JR. 
  johannensis 
  

  

  long; 
  petals 
  2.5-3.5 
  cm. 
  long. 
  

  

  Infrastipular 
  prickles 
  present, 
  more 
  or 
  less 
  curved. 
  

  

  Flowers 
  mostly 
  solitary; 
  petals 
  2.5 
  cm. 
  long 
  or 
  more: 
  

  

  leaflets 
  densely 
  pubescent 
  beneath. 
  

  

  Flowers 
  corymbose; 
  petals 
  about 
  2 
  cm. 
  long; 
  leaflets 
  finely 
  

   puberulent 
  beneath. 
  

  

  31. 
  R. 
  spinosissima. 
  

  

  32. 
  R. 
  paluslriformis 
  

  

  21, 
  Rosa 
  arkansana 
  Porter 
  

  

  Collected 
  in 
  Wisconsin 
  

  

  22. 
  Rosa 
  suffulta 
  Greene 
  

  

  Collected 
  near 
  the 
  Bureau 
  of 
  Standards, 
  Washington, 
  D. 
  C. 
  

  

  This 
  and 
  the 
  preceding 
  species 
  belong 
  to 
  the 
  prairies 
  and 
  plains 
  

  

  west 
  of 
  the 
  Mississippi 
  River 
  and 
  will 
  be 
  treated 
  in 
  a 
  subsequent 
  

   article. 
  

  

  F 
  

  

  22f. 
  Rosa 
  acicularis 
  Lindley 
  

  

  This 
  species 
  was 
  originally 
  described 
  from 
  Siberian 
  material, 
  

   but 
  Alaskan 
  specimens 
  match 
  exactly 
  Lindley's 
  figure 
  and 
  so 
  do 
  

   specimens 
  from 
  Siberia. 
  Specimens 
  from 
  the 
  southern 
  and 
  eastern 
  

  

  w 
  

  

  limits 
  of 
  its 
  range 
  differ 
  a 
  little, 
  in 
  having 
  smaller 
  and 
  less 
  firm 
  

   leaflets, 
  less 
  glaucous 
  beneath, 
  and 
  smaller 
  flowers. 
  They 
  differ 
  

   from 
  R. 
  Engelmannii 
  and 
  R. 
  Bourgeaniana 
  in 
  the 
  leaflets, 
  which 
  are 
  

   narrower 
  and 
  decidedly 
  pubescent 
  beneath; 
  from 
  the 
  former 
  in 
  

   the 
  simple 
  teeth 
  and 
  the 
  lack 
  of 
  glandular 
  granules 
  on 
  the 
  lower 
  

   leaf 
  -surf 
  aces, 
  and 
  usually 
  in 
  the 
  larger 
  fruit; 
  and 
  from 
  the 
  latter 
  

   In 
  the 
  elongate 
  fruit 
  with 
  a 
  distinct 
  neck. 
  All 
  specimens 
  from 
  

  

  