﻿74 
  BOTANICAL 
  GAZETTE. 
  [ 
  Marcll, 
  

  

  the 
  same 
  sort 
  occur. 
  Except 
  for 
  a 
  few 
  such, 
  however, 
  the 
  botanist 
  who 
  

   knows 
  the 
  plants 
  of 
  an 
  extended 
  region 
  will 
  approve 
  of 
  all 
  such 
  unions 
  

   as 
  appear 
  m 
  a 
  necessarily 
  hasty 
  review 
  of 
  the 
  book. 
  

  

  In 
  some 
  few 
  instances, 
  though 
  the 
  editors 
  have 
  evidently 
  done 
  their 
  

   work 
  anew 
  for 
  this 
  edition, 
  and 
  have 
  not 
  contented 
  themselves 
  with 
  com- 
  

   piling 
  from 
  earlier 
  editions 
  or 
  other 
  sources, 
  defective 
  descriptions 
  or 
  the 
  

   omission 
  of 
  really 
  crucial 
  characters 
  are 
  noticeable. 
  Thus, 
  the 
  imbricate 
  

   petals 
  of 
  Anonaceae 
  are 
  still 
  called 
  valvate; 
  Potentilla 
  rivalis, 
  var.pentan- 
  

   dra 
  IS 
  redescribed 
  as 
  having 
  five 
  stamens, 
  whereas 
  the 
  number 
  is 
  usually 
  

   SIX 
  or 
  eight, 
  five 
  being 
  very 
  exceptional 
  in 
  the 
  specimens 
  of 
  the 
  Engelmann 
  

   herbarium 
  and 
  in 
  many 
  that 
  have 
  been 
  examined 
  in 
  the 
  field 
  by 
  Mr. 
  

   H 
  tchcock; 
  the 
  p^taloid 
  filaments 
  of 
  Thalictrum 
  clavatum 
  are 
  called 
  

   club 
  shaped, 
  etc. 
  Very 
  useful 
  distinctions 
  between 
  Oxalis 
  coruiculata 
  

   and 
  Its 
  variety 
  stricta 
  are 
  afi^orded 
  by 
  the 
  rhizomes 
  and 
  dichotomous 
  in- 
  

   florescence 
  of 
  the 
  latter, 
  from 
  which 
  O. 
  recurva, 
  which 
  resembles 
  it 
  in 
  

   m,Vh/.7'r' 
  K 
  ' 
  '" 
  '^' 
  trimorphic 
  heterogony 
  of 
  its 
  flowers. 
  It 
  

   SinthppMT'" 
  '"""'^ 
  *^^* 
  '^' 
  blue. 
  flowered 
  flaxes, 
  intro 
  

   hasWn 
  ^"^> 
  !^^^°"g 
  '^ 
  t^« 
  well-marked 
  forms, 
  one 
  of 
  them, 
  which 
  

  

  cent 
  ca 
  "„ 
  !rT 
  -r^'' 
  '^' 
  "'"^^ 
  °^ 
  ''■ 
  ^""^'^^' 
  having 
  widel^-dehie- 
  

   sep 
  ta 
  of"^ 
  wh 
  r 
  ''^T-r""''' 
  '^' 
  °'^^^- 
  ^'^'^ 
  °«-'y 
  «^o-d 
  capsules 
  the 
  

   hav 
  n^ 
  . 
  . 
  /L' 
  "''' 
  ''*'"'"• 
  ^^^ 
  ^^^'^^«^ 
  ™"«t 
  also 
  plead 
  guilty 
  to 
  

   trfheTnno 
  ^^^^^y,.^-P-^-t 
  characters 
  derivable'^in 
  Epilobi'um 
  

  

  ^tt's 
  at 
  ba" 
  7 
  r';"*'"^ 
  '°""'' 
  "^ 
  «^^«^1^ 
  ^-^' 
  - 
  -o- 
  1' 
  of 
  dense 
  ro- 
  

   rind 
  8 
  of 
  ^ 
  1 
  V 
  "^ 
  '^ 
  ""''■ 
  ^ 
  ^""^ 
  ^' 
  ^^ 
  ^^^'^^"g 
  1^-fy 
  «^^oot* 
  in 
  nos. 
  

   no^2 
  3 
  trfo 
  rru' 
  ^" 
  '" 
  '' 
  ^"^ 
  '' 
  fi^^^-- 
  bulbiferous 
  shoots 
  in 
  

   or 
  anther 
  both 
  . 
  ^^"^T 
  ""'^ 
  ^'^''"^ 
  ^^^ 
  ^^ 
  noticed 
  in 
  one 
  way 
  

   Lflora 
  o; 
  thtr^r^' 
  '°^ 
  """^^^"^ 
  ^"^"^^^«' 
  ^^« 
  -« 
  concerned 
  with 
  

   Im 
  be 
  era 
  teM 
  T 
  Tl' 
  '"^"^^^^ 
  ''''' 
  ^^ 
  ^^e 
  Rocky 
  Mountains, 
  

  

  ed 
  ore 
  on 
  he 
  L 
  Z^T'^ 
  ' 
  ^°°^' 
  ""^ 
  '''' 
  ^'^P^^^^ 
  to 
  congratulate 
  the 
  

   W 
  ir^Tt.^^^^^^^^ 
  ^^^ 
  ^^ 
  -^-^ 
  '^^y 
  ^-e 
  brou'ght 
  it 
  out. 
  

  

  OPEN 
  LETTERS. 
  

  

  Deep-water 
  Nostoc. 
  

  

  Water 
  

  

  5 
  

  

  said 
  "Our 
  deep 
  water 
  NostV^t 
  ''^^'''^ 
  ^^ 
  ^''^^ 
  Michigan. 
  If 
  I 
  had 
  

   pressed 
  my 
  th^^gMmofeTeHeX 
  "'' 
  ^^^^^^^^d'" 
  I 
  ^ould 
  have 
  ex- 
  

  

  C, 
  B. 
  Atwell. 
  

  

  la 
  a 
  letter 
  in 
  this 
  dt'LTr 
  ,^""^ 
  ^^^-^• 
  

  

  be 
  

  

  • 
  +V,- 
  , 
  '""'^'^ 
  1"«^" 
  botany. 
  

  

  ^Vy'' 
  ^hi^h 
  ?eT.ni''' 
  ^'Ifi 
  " 
  ^^^^^ 
  «^"«d 
  attention 
  to 
  

   hisU'S^'ullSfo^^^. 
  fr^^^^ 
  

  

  