﻿r 
  

  

  Williams: 
  Calymperaceae 
  of 
  North 
  America 
  383 
  

  

  with 
  stems 
  up 
  to 
  2 
  cm. 
  high; 
  stem-leaves 
  usually 
  4-5 
  mm. 
  long 
  

   and 
  about 
  0.65 
  mm. 
  wide, 
  nearly 
  linear, 
  the 
  basal 
  part 
  often 
  

   slightly 
  narrower 
  than 
  the 
  Upper 
  part, 
  or 
  the 
  terminal 
  leaves 
  at 
  

   times 
  much 
  shorter 
  and 
  broader, 
  somewhat 
  lanceolate, 
  up 
  to 
  i 
  mm. 
  

   wide, 
  all 
  rather 
  gradually 
  acutely 
  pointed, 
  subtubulose 
  and 
  erect- 
  

   flexuos 
  when 
  dry, 
  widely 
  spreading, 
  almost 
  squarrose 
  when 
  

   moist, 
  with 
  a 
  pale, 
  minutely 
  serrulate 
  or 
  entire 
  border 
  of 
  elongate, 
  

   stereid 
  cells 
  (sometimes 
  quite 
  lacking 
  in 
  the 
  apical 
  leaves) 
  ex- 
  

   tending 
  from 
  about 
  one 
  third 
  below 
  the 
  apex 
  to 
  four 
  fifths 
  way 
  

   down 
  the 
  leaf; 
  costa 
  nearly 
  percurrent, 
  smooth 
  on 
  the 
  back 
  except 
  

   at 
  the 
  slightly 
  denticulate 
  apex, 
  about 
  60 
  m 
  wide 
  near 
  the 
  apex 
  of 
  

   the 
  cancellinae, 
  in 
  cross-section 
  showing 
  three 
  or 
  four 
  guide-cells, 
  

   stereid 
  bands 
  above 
  and 
  below 
  them 
  and 
  outer 
  cells 
  not 
  differen- 
  

   tiated 
  in 
  the 
  upper 
  part, 
  but 
  more 
  or 
  less 
  differentiated 
  on 
  the 
  

   ventral 
  side 
  in 
  the 
  lower 
  costa; 
  cells 
  in 
  upper 
  part 
  of 
  blade 
  mamil- 
  

   lose 
  on 
  the 
  upper, 
  smooth 
  or 
  unipapillate 
  on 
  the 
  under 
  side, 
  mostly 
  

   hexagonal 
  and 
  not 
  elongate 
  or 
  slightly 
  so, 
  the 
  median 
  about 
  8 
  fx 
  

   wide 
  by 
  8-10 
  ju 
  long, 
  those 
  next 
  the 
  costa 
  on 
  upper 
  side 
  often 
  

   bearing, 
  from 
  some 
  distance 
  below 
  the 
  apex 
  to 
  near 
  the 
  cancellinae 
  

   fihform 
  propagulae 
  about 
  0.5 
  mm. 
  long, 
  with 
  fifteen 
  to 
  twenty 
  

   cross- 
  walls; 
  cancellinae 
  filling 
  the 
  most 
  of 
  the 
  leaf-base 
  and 
  ter- 
  

   minating 
  in 
  narrow 
  angles 
  next 
  the 
  costa 
  one 
  fourth 
  to 
  one 
  third 
  

   way 
  up 
  the 
  leaf; 
  perichaetial 
  leaves 
  scarcely 
  differentiated; 
  seta 
  

   2-2.5 
  mm. 
  long, 
  bearing 
  an 
  erect, 
  cylindric 
  capsule 
  about 
  1.5 
  mm, 
  

   long; 
  median 
  exothecal 
  cells 
  more 
  or 
  less 
  four-to-six-sided, 
  20-25 
  /z 
  

   in 
  diameter, 
  with 
  thick 
  walls; 
  peristome 
  and 
  lid 
  not 
  seen; 
  calyptra 
  

   (immature 
  and 
  not 
  fissured) 
  with 
  rather 
  narrow 
  base, 
  gradually 
  

   tapering 
  upward 
  and 
  rough 
  throughout. 
  [Fig. 
  18.] 
  

  

  Type 
  locality: 
  Hispaniola 
  (Hayti). 
  

  

  Distribution: 
  Cuba 
  (£. 
  G. 
  Britton 
  5040a] 
  Brother 
  Leon 
  

   3564), 
  Hayti, 
  Porto 
  Rico 
  {5197, 
  E. 
  G. 
  Britlon), 
  Trinidad 
  and 
  

  

  Yucatan. 
  

  

  Illustration: 
  Schwaegr. 
  Suppl. 
  2^: 
  pL 
  17. 
  

  

  Known 
  only 
  from 
  the 
  original 
  collection 
  until 
  obtained 
  in 
  

   Cuba 
  by 
  Mrs. 
  Britton. 
  The 
  type 
  specimens 
  do 
  not 
  seem 
  to 
  show 
  

   any 
  propagula, 
  but 
  these 
  bodies 
  readily 
  fall 
  off 
  as 
  the 
  leaves 
  

   become 
  older. 
  The 
  species 
  is 
  quite 
  closely 
  related 
  to 
  the 
  South 
  

   American 
  S. 
  flexifolius 
  Mitt., 
  which 
  has 
  similar 
  propagula, 
  but 
  

   the 
  latter 
  has 
  larger 
  leaf-cells 
  and 
  a 
  border 
  extending 
  nearer 
  

   to 
  both 
  the 
  base 
  and 
  the 
  less 
  acute 
  apex 
  while 
  the 
  cancellinae 
  do 
  

   not 
  form 
  so 
  narrow 
  an 
  angle 
  upward. 
  

  

  Lindberg* 
  has 
  given 
  a 
  rather 
  full 
  description 
  of 
  this 
  species 
  and 
  

  

  * 
  Ofv. 
  Kongl. 
  Vet. 
  Akad. 
  Forh. 
  21: 
  604-5. 
  1864. 
  

  

  