﻿242 
  BOTANICAL 
  GAZETTJC. 
  [ 
  October, 
  

  

  The 
  habit 
  here 
  is 
  much 
  the 
  same, 
  though 
  less 
  densely 
  cespi- 
  

   tose, 
  and 
  the 
  palmately 
  divided 
  and 
  nerved 
  leaves 
  are 
  more 
  

   scattered. 
  The 
  flower 
  and 
  fruit 
  show 
  other 
  differences 
  of 
  

   more 
  or 
  less 
  importance. 
  The 
  margin 
  of 
  the 
  disk 
  that 
  lines 
  

   the 
  calyx-tube 
  is 
  more 
  thickened 
  and 
  crenately 
  lobed, 
  and 
  

   outside 
  this 
  margin, 
  as 
  in 
  the 
  other 
  species, 
  are 
  inserted 
  the 
  

   distinct 
  stamens 
  approximately 
  in 
  one 
  row, 
  of 
  which 
  those 
  

   opposite 
  to 
  the 
  middle 
  of 
  the 
  sepals 
  are 
  filiform 
  to 
  the 
  base, 
  

   The 
  seeds 
  have 
  a 
  loose 
  testa 
  much 
  longer 
  than 
  the 
  embryo, 
  

   similar 
  to 
  those 
  found 
  in 
  Sorbarla 
  {Spircea 
  sorbifolia, 
  etc.). 
  

   Unlike 
  as 
  these 
  species 
  are, 
  yet 
  they 
  are 
  more 
  nearly 
  related 
  

   to 
  each 
  other 
  than 
  either 
  of 
  them 
  is 
  to 
  any 
  other 
  species 
  '^'' 
  

  

  that 
  

  

  Spircea. 
  \{ 
  JSri 
  

  

  them 
  

  

  rigmiy 
  separated 
  from 
  Spircea, 
  as 
  I 
  think, 
  then 
  S. 
  ccespiosa 
  

   should 
  rather 
  be 
  joined 
  with 
  it 
  than 
  retained 
  in 
  Spiraa, 
  and 
  

   with 
  It 
  should 
  go 
  our 
  new 
  species, 
  which 
  I 
  have 
  accordingly 
  

   named 
  E. 
  uniflora. 
  The 
  marked 
  differences 
  between 
  these 
  

   species, 
  so 
  marked 
  that 
  some 
  w^ould 
  probably 
  consider 
  

   generic, 
  justify 
  the 
  designation 
  of 
  three 
  sections, 
  EriogfUi 
  

   proper, 
  Petrophytum, 
  and 
  Keheya 
  for 
  E. 
  pectinata, 
  E. 
  cm 
  

   pitosa.^nd 
  E. 
  uniflora 
  respectively, 
  the 
  distinguishing 
  char 
  

   acters 
  of 
  which 
  are 
  obvious. 
  

   Ca7nbrido-e, 
  Mass. 
  

  

  Contributions 
  to 
  the 
  knowledge 
  of 
  North 
  American 
  Sphagna. 
  I^ 
  

  

  C. 
  WARNSTORF. 
  

  

  A. 
  

  

  VI. 
  Sphagna 
  subsecunda. 
  

  

  th 
  sides 
  entirely 
  without 
  pores 
  ; 
  rarely 
  on 
  W 
  

   th 
  appearances 
  of 
  resorption, 
  here 
  andtm^^ 
  

   ,.^., 
  ./^.,.„. 
  ^., 
  ^ 
  prominent 
  flbril-hands, 
  t'ii" 
  

  

  apical 
  half 
  of 
  the 
  leaf 
  Chlorophyll 
  

   tion 
  broad-rectangular 
  to 
  broad 
  farallel-trapezif 
  

   very 
  thick 
  walls, 
  especially 
  on 
  the 
  free-lying 
  Older 
  

   lumen 
  small, 
  roundish-oval. 
  Stem 
  nearly 
  bran 
  

   ■with 
  I 
  or 
  2 
  {very 
  seldom 
  j) 
  tmiform 
  branchlets; 
  

   tons, 
  the 
  stem 
  leaves 
  very 
  slig/itly 
  larger. 
  

   24. 
  S.PylaieiJ\mvi 
  Ptrt.^i 
  tt«;„ 
  . 
  c^^i 
  n 
  ^ta 
  

  

  sec- 
  

  

  'J- 
  

  

  (1827V 
  

  

  Pyl 
  

  

  750 
  

  

  Ne^v 
  

  

  wounmanct 
  [de 
  la 
  Pylaie) 
  ; 
  New 
  York 
  [Peclc) 
  ; 
  ^- 
  

   M 
  n 
  (>'^f) 
  ' 
  New 
  Jersey 
  (^..5//«) 
  ; 
  Carolina 
  [S^^^^ 
  

   Miquelon 
  Island 
  (Ddamare^. 
  

  

  