﻿104 
  

  

  Nichols: 
  The 
  vegetation 
  of 
  Connecticut 
  

  

  many, 
  among 
  them 
  most 
  of 
  the 
  reds, 
  range 
  to 
  much 
  greater 
  

   depths. 
  

  

  Green 
  Algae 
  {Chlorophyceae) 
  

  

  Bryopsis 
  plumosa 
  W 
  

  

  Chaeiomorpha 
  Liniim 
  CW 
  

  

  Cladophora 
  gracilis 
  CWZ 
  

  

  Cladophora 
  lanosa 
  W 
  

  

  Cladophora 
  alblda 
  refrada 
  *. 
  . 
  . 
  . 
  CW 
  Cladophora 
  rupeslris 
  CW 
  

  

  Cladophora 
  arcia 
  W 
  

  

  Ulva 
  Lactuca 
  

  

  Browtst 
  Algae 
  {Phaeophyceae) 
  

  

  Castagnea 
  vtrescens 
  WZ 
  

  

  Chorda 
  Filum 
  CW 
  

  

  Chordaria 
  Jlagelliformis 
  CW 
  

  

  Phyllitis 
  fascia. 
  . 
  . 
  . 
  

   Punctaria 
  latifolia 
  

  

  Pylaiella 
  litloralis, 
  W 
  

  

  Eclocarpus 
  confervoides 
  CWZ 
  Ralfsia 
  clavata. 
  CW 
  

  

  Ectocarpus 
  siliculosus 
  CWZ 
  Sargassum 
  Filipendula 
  W 
  

  

  Leathesia 
  difformis 
  CW 
  

  

  Mesogloia 
  divaricata 
  W 
  

  

  1 
  

  

  Scytosiphon 
  lomentarius 
  

  

  Sphacelaria 
  cirrhosa 
  W 
  

  

  Red 
  Algae 
  (Rhodophyceae) 
  

  

  Anlithamnion 
  atnericanum 
  W 
  

  

  Callithamnion 
  Baileyi. 
  WZ 
  

  

  C 
  allithamnion 
  roseum 
  WZ 
  

  

  Callithamnion 
  tetragonum 
  W 
  

  

  Gracilaria 
  multipartita 
  W 
  

  

  Grinnellia 
  americana 
  CW 
  

  

  Hildenbrandiia 
  Prototypus 
  . 
  . 
  . 
  CW 
  

   Lomentaria 
  uncinata 
  W 
  

  

  Ceramium 
  rubrum 
  CWZ 
  Melobesia 
  pustiilata 
  CW 
  

  

  Ceramium 
  stricium 
  WZ 
  

  

  Champia 
  parvtila 
  , 
  . 
  . 
  . 
  ; 
  W 
  

  

  Chondrla 
  dasyphylla 
  WZ 
  

  

  Chondria 
  tenuissima 
  W 
  

  

  ChondriiS 
  crlspus 
  CW 
  . 
  

  

  Nemalion 
  muUiJidiim 
  

  

  Polysiphonia 
  fastigiata 
  W 
  

  

  Polysiphonia 
  fibrillosa 
  W 
  

  

  Polysiphofiia 
  urceolata 
  C 
  

  

  Polysiphonia 
  variegata 
  W 
  

  

  Corallina 
  officinalis 
  CW 
  Polysiphonia 
  violacea 
  CW 
  

  

  2. 
  Seaweed 
  associations 
  of 
  the 
  littoral 
  region 
  

  

  Introductory. 
  — 
  The 
  vegetation 
  of 
  the 
  littoral 
  along 
  eroding 
  

   rocky 
  shores, 
  like 
  that 
  of 
  the 
  subhttoral, 
  is 
  composed 
  of 
  seaweeds; 
  

   but 
  the 
  ecological 
  relations 
  of 
  the 
  seaweeds 
  growing 
  in 
  these 
  two 
  

   regions 
  are 
  very 
  dissimilar.* 
  In 
  comparison 
  with 
  the 
  strictly 
  

   hydrophytic 
  species 
  of 
  the 
  sublittoral, 
  the 
  characteristic 
  seaweeds 
  

   of 
  the 
  littoral 
  are 
  relatively 
  xerophytic. 
  As 
  in 
  the 
  case 
  of 
  the 
  

   sublittoral 
  region, 
  hoAvever, 
  the 
  vegetation 
  of 
  the 
  littoral 
  is 
  by 
  

   no 
  means 
  uniform 
  throughout 
  and, 
  with 
  reference 
  primarily 
  to 
  

   vegetational 
  dissimularities, 
  this 
  region 
  likewise 
  can 
  be 
  divided 
  

   into 
  two 
  '* 
  sub-regions": 
  the 
  lower 
  littoral 
  and 
  the 
  tipper 
  littoral^ 
  

  

  ♦See 
  earlier 
  discussion 
  of 
  these 
  relations, 
  pp. 
  99, 
  100. 
  

  

  t 
  Along 
  depositing 
  muddy 
  shores, 
  as 
  will 
  be 
  seen 
  later, 
  sharply 
  defined 
  differ- 
  

   ences 
  in 
  the 
  character 
  of 
  the 
  vegetation 
  at 
  different 
  levels 
  clearly 
  differentiate 
  the 
  

   area 
  here 
  termed 
  the 
  lower 
  littoral 
  into 
  two 
  parts, 
  designated 
  by 
  Johnson 
  and 
  York 
  

  

  