﻿214 
  Bergman: 
  Internal 
  stomata 
  in 
  ericaceous 
  fruits 
  

  

  W 
  

  

  that 
  "although 
  stomata 
  are 
  entirely 
  lacking 
  in 
  the 
  epicarp, 
  it 
  is 
  a 
  

   remarkable 
  fact 
  that 
  they 
  occur 
  in 
  considerable 
  numbers 
  In 
  the 
  

  

  endocarp." 
  

  

  / 
  

  

  teristic 
  cells 
  of 
  the 
  endocarp 
  with 
  stomata. 
  ^Fig. 
  i 
  shows 
  a 
  similar 
  

   condition. 
  

  

  The 
  question 
  immediately 
  arose 
  as 
  to 
  the 
  possible 
  occurrence 
  

  

  of 
  internal 
  stomata 
  in 
  other 
  plants, 
  especially 
  In 
  other 
  Ericaceae. 
  

  

  Dr. 
  Nell 
  E. 
  Stevens, 
  of 
  the 
  Bureau 
  of 
  Plant 
  Industry, 
  kindly 
  

  

  loaned 
  the 
  writer 
  some 
  permanent 
  slides 
  of 
  sections 
  of 
  the 
  fruits 
  

  

  of 
  Epigaea 
  repens 
  L. 
  An 
  examination 
  was 
  made 
  of 
  a 
  number 
  of 
  

  

  sections 
  and 
  stomata 
  were 
  found 
  in 
  the 
  endocarp. 
  At 
  that 
  time 
  

  

  no 
  other 
  plants 
  were 
  available, 
  and 
  further 
  observations 
  were 
  

   left 
  until 
  later. 
  

  

  Among 
  the 
  ericaceous 
  plants 
  which 
  were 
  examined 
  during 
  

   the 
  summer 
  and 
  autumn 
  of 
  191 
  9 
  were 
  wintergreen 
  (GauUheria 
  

   procumbens, 
  L.), 
  bear 
  berry 
  {Arctostaphylos 
  Uva-ursi 
  [L.l 
  Spreng.), 
  

  

  berries 
  

  

  {Monotropa 
  uniflora 
  L. 
  and 
  M. 
  Hypopitys 
  

  

  pen 
  

  

  V. 
  vacillans 
  Kalm), 
  huckleberry 
  {Gaylussacia 
  baccata 
  [Wang.] 
  

   C. 
  Koch), 
  dangle 
  berry 
  {Gaylussacia 
  frondosa 
  [L.] 
  T. 
  & 
  G.), 
  

   mountain 
  cranberry 
  (F. 
  Vitis-Idaea 
  var, 
  minus 
  l^odd.) 
  and 
  moun- 
  

   tain 
  laurel 
  (Kalmia 
  latifolia 
  L.). 
  Other 
  species 
  studied 
  were 
  

   canna 
  {Canna 
  sp.), 
  St. 
  John's 
  Lily, 
  (Crinum 
  asiaticum 
  L.) 
  and 
  

   cultivated 
  snowberry 
  (Symphoricarpos 
  racemosus 
  Michx.). 
  

  

  In 
  describing 
  the 
  endocarp 
  of 
  the 
  blueberry 
  WInton 
  (11, 
  

   p. 
  371) 
  says: 
  "This 
  tissue, 
  consisting 
  of 
  a 
  single 
  thin 
  layer 
  of 
  

   loosely 
  united 
  stone 
  cells, 
  is 
  intermediate 
  between 
  the 
  parenchy- 
  

   matous 
  endocarp 
  of 
  the 
  cranberry 
  on 
  one 
  hand, 
  and 
  the 
  thick 
  stone- 
  

   cell 
  tissue 
  of 
  the 
  huckleberry 
  endocarp 
  on 
  the 
  other. 
  These 
  stone 
  

   cells 
  separate 
  readily 
  from 
  one 
  another 
  and 
  are 
  remarkable 
  for 
  

   their 
  diversity 
  of 
  size 
  and 
  shape." 
  He 
  shows 
  also 
  (p. 
  371,/. 
  288) 
  

   a 
  figure 
  of 
  the 
  endocarp 
  of 
  a 
  blueberry 
  ( 
  V. 
  Myrtillus 
  L.) 
  without 
  

   stomata. 
  

  

  In 
  the 
  three 
  species 
  of 
  blueberries 
  studied 
  by 
  the 
  writer 
  stomata 
  

   were 
  found 
  in 
  the 
  endocarp, 
  although 
  often 
  much 
  deformed. 
  

   The 
  stomata 
  are 
  largest 
  In 
  V. 
  corymhosum 
  (Fig. 
  2) 
  . 
  In 
  F. 
  pennsyl- 
  

   vanicum 
  (Fig. 
  3) 
  they 
  are 
  similar 
  but 
  somewhat 
  smaller. 
  The 
  

  

  