﻿216 
  Bergman: 
  Internal 
  stomata 
  in 
  ericaceous 
  fruits 
  

  

  guard 
  cells 
  in 
  all 
  three 
  species 
  contain 
  chloropasts- 
  Stomata 
  

   also 
  occur 
  in 
  the 
  endocarp 
  of 
  fruits 
  of 
  Vaccinium 
  Vitis-Idaea 
  var. 
  

  

  minus 
  

  

  and 
  in 
  the 
  endocarp 
  of 
  Gayhissacia 
  frondosa. 
  The 
  outline 
  

   formed 
  by 
  the 
  guard 
  cells 
  in 
  the 
  last 
  species 
  is 
  generally 
  typical, 
  

   but 
  the 
  stomata 
  seem 
  to 
  be 
  less 
  well 
  developed 
  than 
  in 
  Vaccimim 
  

   and 
  always 
  closed. 
  Both 
  species 
  of 
  Gayhtssacia 
  have 
  an 
  excessively 
  

   stony 
  endocarp. 
  

  

  Almost 
  all 
  authors 
  agree 
  on 
  the 
  complete 
  absence 
  of 
  stomata 
  

  

  i 
  

  

  in 
  Mofiotropa 
  Hypopitys, 
  Thus 
  Rudolphi 
  (5, 
  p. 
  70) 
  says, 
  ''sie 
  

   fehlen 
  . 
  . 
  . 
  bei 
  Monotropa 
  Hypopitys, 
  Ophrys 
  nidus-avis 
  and 
  

   Cuscuta 
  Europaea.*^ 
  This 
  statement 
  or 
  a 
  similar 
  one 
  may 
  be 
  

   found 
  in 
  many 
  of 
  the 
  more 
  important 
  works 
  on 
  plant 
  anatomy. 
  

  

  79) 
  quotes 
  Chatint 
  

  

  Mono 
  

  

  tropa, 
  although 
  Chatin, 
  in 
  a 
  special 
  part 
  of 
  his 
  work, 
  asserts 
  the 
  

   absence 
  of 
  stomata 
  on 
  the 
  stem 
  and 
  scale 
  leaves. 
  Chatin 
  also, 
  

   according 
  to 
  Porsch, 
  reports 
  the 
  occurrence 
  of 
  stomata 
  on 
  the 
  

   under 
  side 
  of 
  the 
  scale 
  leaves 
  of 
  Monotropa 
  unijlora. 
  Solereder 
  

   (7, 
  p. 
  489) 
  also 
  says, 
  "stomata 
  are 
  only 
  met 
  with 
  exceptionally 
  

   (and 
  not 
  in 
  all 
  the 
  Monotropeae) 
  on 
  the 
  axis 
  or 
  on 
  the 
  lower 
  side 
  

  

  of 
  the 
  leaf. 
  

  

  >> 
  

  

  Observations 
  were 
  made 
  on 
  a 
  number 
  of 
  plants 
  of 
  Mono- 
  

   tropa 
  uniflora 
  without 
  finding 
  stomata 
  in 
  the 
  endocarp 
  or 
  else- 
  

   where. 
  Plants 
  of 
  this 
  species, 
  however, 
  collected 
  in 
  Livermore, 
  

   Maine, 
  July, 
  4 
  1919, 
  by 
  Dr. 
  Stevens, 
  showed 
  occasional 
  stomata 
  

  

  + 
  

  

  in 
  the 
  endocarp 
  (Fig, 
  4) 
  and 
  also 
  on 
  the 
  scale 
  leaves 
  (Fig. 
  5). 
  

   These 
  were 
  large 
  and 
  much 
  misshapen, 
  the 
  aperture 
  being 
  often 
  

   longer 
  on 
  the 
  transverse 
  axis 
  of 
  the 
  stoma 
  than 
  on 
  the 
  longitudinal* 
  

   Repeated 
  observations 
  of 
  the 
  inner 
  surface 
  of 
  the 
  ovaries 
  of 
  

   M. 
  Hypopiiys 
  have 
  failed 
  to 
  reveal 
  the 
  presence 
  of 
  stomata, 
  al- 
  

   though 
  they 
  have 
  been 
  found 
  on 
  the 
  under 
  side 
  of 
  the 
  scale 
  leaves, 
  

   Stomata 
  were 
  not 
  found 
  in 
  the 
  endocarp 
  of 
  Gaiiltheria, 
  Kalmia^ 
  

   A 
  rctostaphyloSt 
  Gaylussacia 
  baccata 
  or 
  Symphoricarpos 
  . 
  Later, 
  

   fruits 
  of 
  Canna 
  and 
  Crinum 
  were 
  examined 
  and 
  numbers 
  of 
  sto- 
  

   mata 
  found 
  in 
  the 
  endocarp 
  (Figs. 
  6 
  and 
  8). 
  The 
  stomata 
  on 
  

  

  * 
  Material 
  collected 
  by 
  Miss 
  Mary 
  Percival 
  on 
  Mt. 
  Washington, 
  New 
  Hampshire^ 
  

  

  r 
  

  

  August 
  10. 
  1919- 
  Observations 
  made 
  by 
  Dr. 
  Neil 
  E. 
  Stevens. 
  

  

  t 
  Chatin, 
  Adolphe. 
  Anatomic 
  comparee 
  de 
  v^getaux. 
  Paris. 
  1856-62. 
  Chatin'a 
  

   work 
  has 
  not 
  been 
  seen 
  by 
  the 
  writer. 
  

  

  