﻿518 
  

  

  Nichols: 
  The 
  vegetation 
  of 
  Connecticut 
  

  

  / 
  

  

  r 
  

  

  since, 
  almost 
  invariably, 
  all 
  portions 
  of 
  the 
  beach 
  beyond 
  reach 
  of 
  

   the 
  waves 
  quickly 
  become 
  covered 
  over 
  by 
  aeolian 
  deposits: 
  by 
  

   wind-blown 
  sands 
  which 
  the 
  on-shore 
  gales 
  catch 
  up 
  from 
  the 
  

   middle 
  beach 
  and 
  sweep 
  landward. 
  In 
  this 
  way 
  there 
  originates 
  

   what 
  may 
  appropriately 
  be 
  designated 
  the 
  dune 
  beach: 
  an 
  area 
  

   distinguished 
  primarily 
  by 
  the 
  presence 
  of 
  sand 
  dunes.* 
  

  

  r 
  

  

  Fig. 
  2. 
  Somewhat 
  

  

  spit 
  shown 
  in 
  Fig. 
  i; 
  tide 
  not 
  quite 
  low. 
  Spariina 
  glabra 
  forming 
  an 
  incipient 
  marsh 
  

   in 
  midlittoral; 
  Am?nophila 
  on 
  dune 
  beach 
  above; 
  intermediate 
  beach 
  nearly 
  barren 
  

   of 
  vegetation. 
  

  

  I 
  

  

  Probably 
  the 
  finest 
  dune 
  beaches 
  in 
  the 
  United 
  States 
  are 
  those 
  

   of 
  the 
  Lake 
  Michigan 
  region, 
  the 
  physiographic 
  and 
  ecological 
  

   relations 
  of 
  which 
  have 
  been 
  so 
  admirably 
  portrayed 
  by 
  Cowles 
  

  

  ('99). 
  

  

  There 
  the 
  dune 
  areas 
  constitute 
  an 
  important 
  geographic 
  

   feature, 
  extending 
  for 
  long 
  distances 
  along 
  the 
  southern 
  and 
  east- 
  

   ern 
  shores 
  of 
  the 
  lake 
  and 
  in 
  places 
  reaching 
  inland 
  for 
  more 
  than 
  a 
  

  

  These 
  dunes 
  frequently 
  attain 
  elevations 
  of 
  a 
  hundred 
  

  

  mile. 
  

  

  * 
  The 
  term 
  dune 
  beach 
  has 
  been 
  used 
  by 
  Ganong 
  ('06) 
  in 
  a 
  somewhat 
  more 
  

   restricted 
  sense 
  than 
  tliat 
  in 
  which 
  it 
  is 
  used 
  by 
  the 
  writer. 
  

  

  