﻿J 
  

  

  1890-] 
  BOTANICAL 
  GAZETTE. 
  223 
  

  

  nished 
  with 
  a 
  branching 
  network 
  of 
  bands, 
  as 
  in 
  certain 
  

   species 
  of 
  Fossombronia 
  and 
  Riccia. 
  

  

  £. 
  Branch 
  leaves 
  very 
  long 
  and 
  narrow, 
  almost 
  linear, 
  fiat, 
  

   broadly 
  bordered 
  by 
  4 
  to 
  6 
  rows 
  of 
  narrow 
  cells, 
  margin 
  den- 
  

   tate 
  to 
  the 
  base, 
  apex 
  broad-truncate 
  and 
  dentate. 
  Pores 
  on 
  

   the 
  outer 
  side 
  situated 
  solely 
  in 
  the 
  upper 
  angles 
  of 
  the 
  cells, 
  

   or 
  sometimes 
  in 
  the 
  upper 
  and 
  lower, 
  and 
  very 
  small. 
  Stem 
  

   leaves 
  large, 
  narrow 
  isosceles-triangular, 
  dentate 
  at 
  the 
  trun- 
  

   cate 
  apex, 
  with 
  a 
  broad 
  border 
  almost 
  equally 
  broad 
  to 
  the 
  

   base; 
  every 
  hyaline 
  cell 
  divided 
  by 
  an 
  obUque 
  cross- 
  wall, 
  tibril- 
  

   lose 
  to 
  the 
  base 
  of 
  the 
  leaf; 
  arrangement 
  of 
  pores 
  the 
  same 
  as 
  

   in 
  the 
  branch 
  leaves. 
  

  

  19- 
  S. 
  Trinitensc 
  C. 
  Muell. 
  Synops. 
  I. 
  p. 
  102 
  (1849). 
  

  

  Syn.: 
  S.sermtum 
  Austin 
  in 
  Bull. 
  Torr. 
  Bot. 
  Club, 
  p. 
  145 
  (1877) 
  ac- 
  

   cording 
  to 
  a 
  Miiller, 
  Flora 
  1886. 
  

  

  S. 
  cuspidatum, 
  var. 
  serratum 
  (Aust.) 
  Lesq. 
  & 
  James, 
  Manual, 
  p. 
  15 
  

   (1884). 
  . 
  

  

  Florida 
  {FUzgerald). 
  

  

  This 
  species, 
  an 
  original 
  specimen 
  of 
  which 
  I 
  have 
  been 
  

   able 
  to 
  examine, 
  seems 
  in 
  habit 
  very 
  similar 
  to 
  a 
  feeble 
  S. 
  

   cuspidatum 
  var. 
  plumosum, 
  and 
  also 
  in 
  most 
  points 
  agrees 
  

   with 
  that 
  form 
  in 
  anatomical 
  structure. 
  It 
  seems 
  to 
  me, 
  how- 
  

   ever, 
  remarkable 
  that 
  all 
  the 
  hyaline 
  cells 
  of 
  the 
  stem 
  leaves 
  

   are 
  always 
  divided 
  by 
  a 
  cross-wall 
  in 
  S. 
  Trinitense, 
  a 
  condi- 
  

  

  lon 
  which 
  I 
  do 
  not 
  remember 
  ever 
  to 
  have 
  observed 
  in 
  the 
  

  

  orms 
  of 
  the 
  genuine 
  S. 
  cuspidatum; 
  in 
  the 
  latter, 
  indeed, 
  

   cross-partitions 
  of 
  the 
  hyaline 
  cells 
  of 
  the 
  stem 
  leaves 
  also 
  

  

  ccur, 
  but 
  only 
  isolatedly. 
  Although 
  therefore 
  I 
  must 
  ad- 
  

   jjiit 
  that 
  S. 
  Trinitense 
  {S. 
  serraium. 
  Awstm) 
  stands 
  extremely 
  

   ^ar 
  to 
  S. 
  ciispidaltim 
  war. 
  plumosum 
  f. 
  serrulalum 
  Schlieph., 
  

  

  evertheless 
  I 
  am 
  inclined 
  to 
  treat 
  the 
  former 
  provisionally 
  

   ' 
  ''} 
  type 
  distinct 
  from 
  S. 
  cuspidatum, 
  on 
  account 
  of 
  the 
  in- 
  

  

  'inable 
  cell-division 
  in 
  the 
  stem 
  leaves. 
  A 
  final 
  decision 
  

   *:'" 
  °"v 
  be 
  reached 
  when 
  more 
  abundant 
  material 
  for 
  inves- 
  

   %ation 
  shall 
  be 
  at 
  our 
  disposal. 
  

  

  abl 
  

  

  III. 
  Sphag-na 
  squarrosa. 
  

  

  20. 
  

  

  uJ' 
  ^- 
  sguarrosum 
  Pers. 
  MSS. 
  Sw, 
  in 
  Schrad. 
  J 
  

   "Ot. 
  1800. 
  T 
  P 
  o 
  >. 
  ^„o 
  

  

  Wahlenb. 
  

  

  (Igogj 
  ^y^^^f^^ium, 
  var. 
  squarrosum 
  Bruch 
  MSS. 
  Bryol. 
  Germ. 
  I, 
  p. 
  H 
  

  

  S. 
  teres, 
  var. 
  1. 
  squarrosum 
  Pers. 
  as 
  species, 
  Warnst. 
  in 
  Die 
  Europ. 
  

   '^^f'n.p.l21(i881). 
  

  

  