﻿I 
  890. 
  J 
  

  

  BOTANICAL 
  GAZETTE. 
  

  

  311 
  

  

  tapering 
  about 
  equally 
  above 
  and 
  below 
  from 
  the 
  middle 
  ; 
  

   subsequently 
  I 
  observed 
  it 
  in 
  several 
  places 
  in 
  Lake 
  county, 
  

   Indiana. 
  It 
  is 
  taller 
  and 
  more 
  robust 
  in 
  peaty 
  or 
  wettish 
  

   ground, 
  reaching 
  in 
  one 
  case 
  a 
  height 
  of 
  six 
  feet, 
  and 
  lower 
  

   in 
  the 
  sands 
  where 
  it 
  grows 
  with 
  P. 
  Banksiana. 
  The 
  pres- 
  

   ent 
  season 
  (1890) 
  I 
  have 
  seen 
  it 
  in 
  Cook 
  county, 
  Illinois, 
  

   within 
  the 
  limits 
  of 
  Chicago, 
  and 
  confidentlv 
  expect 
  to 
  see 
  it 
  

   covered 
  with 
  the 
  oblong 
  fruit 
  later 
  in 
  the 
  year. 
  This 
  experi- 
  

   ence 
  in 
  field 
  study 
  shows 
  that 
  there 
  is 
  more 
  than 
  the 
  fruit 
  to 
  

   distinguish 
  R. 
  Engelmanni 
  from 
  R. 
  blanda. 
  I 
  was 
  not 
  aware 
  

   of 
  the 
  existence 
  of 
  the 
  former 
  species 
  till 
  the 
  copy 
  of 
  Garden 
  

   and 
  Forest 
  reached 
  me 
  at 
  Tower 
  about 
  the 
  20th 
  of 
  August, 
  

   ■inis 
  was 
  more 
  than 
  two 
  months 
  after 
  the 
  specimens 
  had 
  been 
  

   gathered 
  and 
  selected 
  out 
  for 
  comparison 
  when 
  the 
  fruit 
  

   should 
  mature, 
  the 
  time 
  of 
  collecting 
  in 
  flower 
  being 
  June 
  

  

  ^WA 
  -^''^^^'"^'^^b'' 
  then, 
  the 
  species 
  can 
  be 
  separated 
  from 
  

   allied 
  forms 
  at 
  the 
  time 
  of 
  anthesis, 
  and 
  to 
  me 
  it 
  was 
  inde- 
  

   P^"^|^"t 
  of 
  other 
  help. 
  It 
  is 
  probable 
  that 
  the 
  species 
  will 
  

   ^vill 
  be 
  found 
  in 
  other 
  localities 
  along 
  Lake 
  Michigan, 
  having 
  

   evidently 
  been 
  overlooked 
  or 
  confounded 
  with 
  R. 
  blanda. 
  I 
  

   may 
  add 
  that 
  the 
  work 
  of 
  the 
  season, 
  together 
  with 
  that 
  ot 
  

   ibpo 
  gives 
  five 
  species 
  of 
  Rosa 
  for 
  the 
  vic'nity 
  of 
  Chicago, 
  

   JJe 
  lake 
  flora 
  taking 
  four, 
  R. 
  Engelmanni, 
  R. 
  blanda, 
  R. 
  

   ^arohna 
  and 
  R. 
  humilis, 
  and 
  the 
  Des 
  Plaines 
  river 
  one, 
  R. 
  

   setigera. 
  And 
  it 
  should 
  also 
  be 
  added 
  that 
  there 
  are 
  forms 
  

   ot 
  these 
  lake 
  roses 
  which 
  are 
  still 
  troublesome 
  to 
  assign, 
  as 
  

   lere 
  seem 
  to 
  be 
  gradations, 
  perhaps 
  intercrossing, 
  since 
  

   ey 
  often 
  grow 
  freely 
  in 
  close 
  proximity, 
  especially 
  the 
  first 
  

   ^i-ee. 
  The 
  first 
  two 
  are 
  commonlv 
  two 
  or 
  more 
  weeks 
  

   eailier 
  m 
  time 
  of 
  flowering, 
  being 
  auite 
  well 
  out 
  of 
  bloom 
  

   wiien 
  R. 
  humilis 
  is 
  at 
  its 
  best, 
  an( 
  

  

  til 
  

  

  "'ng 
  to 
  open. 
  

   Englczvood 
  P. 
  

  

  d 
  R. 
  Carolina 
  just 
  begin- 
  

  

  \ 
  

  

  BRIEFER 
  ARTICLES. 
  

  

  jj. 
  ^[™Ple 
  device 
  for 
  illustrating 
  hydrotropism. 
  - 
  Take 
  an 
  ordinary 
  

  

  J^^' 
  P'^ted 
  clock, 
  remove 
  the 
  thumb-piece 
  at 
  the 
  back 
  which 
  is 
  used 
  to 
  

  

  n 
  the 
  hands, 
  and 
  solder 
  it 
  to 
  the 
  bottom 
  of 
  a 
  cylindrical 
  tin 
  box 
  about 
  

  

  inches 
  in 
  diameter 
  and 
  three 
  or 
  four 
  deep, 
  in 
  which 
  the 
  seeds 
  are 
  to 
  

  

  Planted. 
  Now 
  when 
  the 
  thumb 
  piece 
  is 
  slipped 
  back 
  in 
  place 
  on 
  the 
  

  

  ^ 
  ^""^ 
  shoulder 
  of 
  the 
  shaft 
  which 
  turns 
  the 
  hour 
  hand, 
  the 
  tin 
  box 
  will, 
  

  

  