﻿1890.] 
  BOTANICAL 
  GAZETTE. 
  I47 
  

  

  two 
  white 
  water-lilies 
  one 
  may 
  have 
  in 
  hand 
  when 
  he 
  picks 
  

   a 
  blossom 
  from 
  its 
  stem, 
  nor 
  convenient 
  to 
  ''go 
  to 
  the 
  root 
  of 
  

   the 
  matter 
  to 
  see," 
  one 
  of 
  the 
  chief 
  characteristics 
  being 
  so 
  

   radical, 
  but 
  generally 
  those 
  seen 
  in 
  the 
  Northern 
  Peninsula 
  

   were 
  designated 
  Nyniphcea 
  reniformis 
  {N. 
  tuber 
  osa 
  Paine), 
  

   judged 
  by 
  the 
  flowers 
  and 
  other 
  marks 
  w^hen 
  compared 
  w^ith 
  

   those 
  common 
  in 
  all 
  our 
  waters. 
  In 
  fact, 
  I 
  have 
  never 
  found 
  

   an 
  undoubted 
  example 
  of 
  N. 
  odorata 
  about 
  Chicago, 
  although 
  

   It 
  is 
  said 
  to 
  grow 
  here. 
  When 
  the 
  parts 
  underground 
  are 
  

   examined 
  they 
  prove 
  to 
  be 
  tuber-bearing. 
  The 
  shape 
  of 
  the 
  

   leaf 
  is 
  unreliable. 
  x\nd 
  so 
  it 
  was 
  in 
  northern 
  Michigan. 
  The 
  

   plants 
  grew 
  in 
  great 
  abundance 
  in 
  Goose 
  Lake, 
  near 
  Negau- 
  

   nee, 
  the 
  flowers 
  were 
  pretty 
  large, 
  with 
  but 
  little 
  odor, 
  and 
  

   the 
  roots 
  bore 
  the 
  characteristic 
  tubers. 
  When 
  botanizing 
  at 
  

   Petoskey, 
  in 
  187S, 
  some 
  plants 
  of 
  N. 
  odorata 
  were 
  collected 
  

   in 
  a 
  shallow 
  lake, 
  having 
  rather 
  small 
  very 
  sweet-scented 
  

   flowers, 
  like 
  those 
  common 
  in 
  New^ 
  England. 
  It 
  doubtless 
  

   occurs 
  throughout 
  these 
  northern 
  regions, 
  as 
  it 
  is 
  said 
  to 
  be 
  

   abundant 
  in 
  northern 
  Minnesota 
  and 
  British 
  America, 
  but 
  

  

  the 
  Petoskey 
  specimen 
  as 
  yet 
  remains 
  my 
  onl}^ 
  undoubted 
  

  

  case. 
  

  

  Species 
  of 
  Potamogeton 
  w^ere 
  particularly 
  sought 
  after, 
  

   both 
  for 
  studying 
  their 
  variations 
  and 
  geographical 
  distribu- 
  

   tion. 
  On 
  the 
  whole 
  the}' 
  show 
  considerable 
  variation, 
  and 
  

   the 
  published 
  descriptions 
  need 
  some 
  changes 
  or 
  enlarge- 
  

   nients 
  to 
  facilitate 
  easy 
  determination 
  by 
  those 
  not 
  specially 
  

   versed 
  in 
  the 
  group. 
  P. 
  rufescens 
  is 
  naturally 
  looked 
  for 
  in 
  

   the 
  north, 
  w^here 
  the 
  waters 
  or 
  climate 
  seem 
  more 
  congenial 
  

   to 
  its 
  growth, 
  and 
  was 
  seen 
  in 
  several 
  places. 
  In 
  the 
  sum- 
  

   mer 
  of 
  1888, 
  while 
  passing 
  a 
  month 
  in 
  studying 
  the 
  flora 
  of 
  

   the 
  lower 
  Saguenay, 
  it 
  was 
  seen 
  to 
  be 
  the 
  most 
  common 
  

   species 
  in 
  the 
  clear, 
  cold 
  waters 
  of 
  the 
  trout 
  lakes 
  and 
  

   streams 
  about 
  Chicoutimi 
  and 
  Tadousac. 
  P. 
  amplifolius 
  

   and 
  P^. 
  Pennsylvanicus 
  are 
  still 
  more 
  common 
  in 
  the 
  Lake 
  

   Superior 
  region, 
  the 
  former 
  particularly 
  of 
  wide 
  distribution 
  

   ^^d 
  abundant 
  in 
  places. 
  P. 
  amplifolius, 
  with 
  branching 
  

   stems, 
  is 
  not 
  uncommon 
  throughout 
  the 
  lake 
  region, 
  and 
  this 
  

   aistmction 
  between 
  it 
  and 
  P. 
  Illinoensis 
  will 
  not 
  hold. 
  Then 
  

   ^'e 
  find 
  it 
  has 
  pointed, 
  bi-carinate 
  stipules. 
  

  

  P. 
  Robbinsii 
  was 
  met 
  with 
  tw^ice, 
  first 
  in 
  a 
  pond 
  at 
  Re- 
  

   Ppohc, 
  and 
  afterward 
  at 
  the 
  outlet 
  of 
  Goose 
  Lake, 
  south 
  of 
  

   -^egaunee. 
  Later 
  in 
  the 
  season 
  it 
  was 
  again 
  seen 
  in 
  great 
  

   ll^antities 
  in 
  Chesago 
  Lake, 
  Minn. 
  Hence, 
  I 
  conclude 
  that 
  

   ^t 
  is 
  more 
  widely 
  spread 
  in 
  our 
  northern 
  regions 
  than 
  has 
  

  

  