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  Haynes: 
  Six 
  species 
  of 
  Riccia 
  

  

  intus 
  non 
  papillosi 
  (ut 
  in 
  Sphaerocarpo), 
  longissimi, 
  intertexti. 
  

   Fructus 
  in 
  frondis 
  substantia 
  immersus 
  {ut 
  in 
  Riccia). 
  Sporangia 
  

   depresso-globosa, 
  singulatim 
  nata, 
  non 
  libera. 
  Calyptra 
  stylo 
  

  

  persi 
  

  

  vix 
  solutae, 
  in 
  aspectu 
  singulae 
  et 
  profunde 
  quadrilobae. 
  

  

  Sphaerocarp 
  

  

  <i 
  

  

  A 
  genus 
  intermediate 
  between 
  Riccia 
  and 
  Sphaerocarpus 
  

  

  spores 
  

  

  the 
  fruit 
  is 
  immersed 
  in 
  the 
  frond 
  as 
  in 
  the 
  former 
  genus. 
  Repre- 
  

  

  r 
  

  

  sented 
  by 
  a 
  single 
  species, 
  which 
  occurs 
  both 
  in 
  the 
  Southern 
  

   States 
  and 
  in 
  France, 
  

  

  It 
  

  

  Cryptocarpus 
  Curtisii, 
  Aust. 
  MSS., 
  1864. 
  

  

  ii 
  

  

  Riccia 
  Curtissi, 
  James, 
  in 
  -Herb, 
  (fide 
  Curtis) 
  

  

  "Fronde 
  caespitosa 
  valde 
  imbricata 
  fibroso-papulata, 
  laciniis 
  

   inciso-Iobulatis 
  margine 
  crenatis; 
  sporangiis 
  maximis 
  in 
  statu 
  

   siccati 
  latentibus 
  sed 
  frondes 
  humefactae 
  sunt 
  in 
  substantia 
  

   earum 
  ut 
  maculis 
  nigris 
  apparentibus; 
  sporis 
  fusco-nigris 
  valde 
  

   muricatis. 
  

  

  "On 
  moist 
  ground, 
  South 
  Carolina, 
  Ravenel 
  (in 
  Herb. 
  Sulliv., 
  

   1849) 
  North 
  Carolina, 
  Curtis 
  (l.c,, 
  1853). 
  ' 
  Montand 
  apres 
  

   Marseille' 
  (Herb. 
  Lanning, 
  'ex. 
  Herb. 
  Torrey'). 
  

  

  "To 
  the 
  naked 
  eye 
  the 
  dried 
  specimens 
  look 
  like 
  little 
  heaps 
  of 
  

  

  some 
  filanientose 
  conferva. 
  

  

  very 
  

  

  and, 
  on 
  account 
  of 
  its 
  loose 
  texture, 
  appears 
  to 
  be 
  deeply 
  pitted 
  

   and 
  fibrose 
  and 
  papulose 
  above. 
  Upon 
  moistening 
  the 
  specimens 
  

   the 
  fronds 
  become 
  tough 
  (much 
  as 
  in 
  the 
  Anthoceroteae) 
  , 
  the 
  

  

  + 
  

  

  upper 
  surface 
  looses 
  its 
  pitted 
  appearance, 
  and 
  the 
  interstices 
  

   (apparent 
  fibres) 
  between 
  the 
  large 
  cells 
  close 
  up; 
  and 
  the 
  fruit, 
  

   which 
  was 
  completely 
  hidden 
  before, 
  now 
  appears 
  as 
  a 
  black 
  

   spot 
  in 
  the 
  substance 
  of 
  the 
  frond. 
  Upon 
  re-drying 
  the 
  specimens 
  

   the 
  fronds 
  become 
  much 
  thinner 
  than 
  they 
  were 
  at 
  first, 
  and 
  the 
  

   fruit 
  remains 
  visible, 
  protruding 
  from 
  the 
  upper 
  surface. 
  The 
  

   frond 
  is 
  larger 
  than 
  in 
  Sphaerocarpus 
  Michelii, 
  from 
  the 
  Southern 
  

   States, 
  but 
  lobed 
  and 
  reticulated 
  in 
  the 
  same 
  manner. 
  The 
  

  

  apices 
  of 
  the 
  lobes 
  are 
  often 
  suddenly 
  contracted 
  and 
  

   subsolid 
  (much 
  as 
  is 
  often 
  seen 
  in 
  the 
  Anthoceroteae) 
  . 
  The 
  

   base 
  of 
  the 
  divisions 
  are 
  contracted 
  and 
  subsolid, 
  and 
  the 
  rootlets 
  

   are 
  smooth 
  on 
  the 
  interior 
  surface 
  as 
  in 
  Sphaerocarpus. 
  The 
  

   divisions 
  are 
  flabelliform, 
  and 
  palmately 
  or 
  inclsed-lobed, 
  and 
  lie 
  

  

  extreme 
  

  

  