﻿Bergman: 
  Internal 
  stomata 
  in 
  ericaceous 
  fruits 
  217 
  

  

  the 
  integument 
  of 
  canna 
  seed 
  (Fig. 
  7) 
  are 
  peculiar 
  in 
  having 
  the 
  

   guard 
  cells 
  very 
  much 
  larger, 
  than 
  the 
  surrounding 
  cells. 
  The 
  

   presence 
  of 
  internal 
  stomata 
  in 
  fruits 
  of 
  the 
  tulip 
  and 
  other 
  mono- 
  

   cotyledonous 
  plants 
  is 
  of 
  much 
  in- 
  

   terest, 
  since 
  these 
  are 
  very 
  remote 
  

   in 
  relationship 
  to 
  the 
  ericaceous 
  

   plants, 
  in 
  which 
  group 
  internal 
  

   Stomata 
  have 
  been 
  most 
  often 
  

   found. 
  No 
  further 
  observations 
  

   have 
  been 
  made 
  as 
  to 
  the 
  possible 
  

   occurrence 
  of 
  Internal 
  stomata 
  in 
  

   fruits 
  of 
  other 
  monocotyledonous 
  

   plants. 
  

  

  Fig. 
  6. 
  A 
  stoma 
  from 
  the 
  enclo- 
  

  

  Two 
  points 
  of 
  great 
  importance 
  ^^'^ 
  ^^ 
  ^^''"^ 
  ''"'^^ 
  ^^^^^^^^ 
  ^"^^'' 
  

  

  X 
  240. 
  

  

  to 
  be 
  considered 
  in 
  connection 
  

   with 
  the 
  presence 
  of 
  internal 
  stomata 
  are, 
  first, 
  to 
  determine 
  

   whether 
  or 
  not 
  they 
  retain 
  their 
  ability 
  to 
  function, 
  second, 
  to 
  

   account 
  for 
  their 
  persistence 
  inside 
  the 
  fruit. 
  In 
  the 
  attempt 
  to 
  

   answer 
  the 
  first 
  question 
  a 
  number 
  of 
  observations 
  have 
  been 
  

  

  / 
  

  

  Fig. 
  7, 
  Two 
  stomata 
  with 
  adjacent 
  cellci 
  from 
  the 
  integument 
  of 
  canna 
  seed. 
  

  

  X 
  760. 
  

  

  made 
  on 
  the 
  cultivated 
  cranberry. 
  Berries 
  freshly 
  collected 
  

   from 
  the 
  plants 
  on 
  clear 
  days 
  were 
  taken 
  at 
  once 
  into 
  the 
  labor- 
  

   atory 
  and 
  portions 
  of 
  the 
  endocarp 
  mounted 
  and 
  examined. 
  

   Other 
  berries 
  were 
  collected 
  on 
  densely 
  cloudy 
  days, 
  when 
  exam- 
  

  

  i 
  

  

  inations 
  of 
  the 
  stomata 
  on 
  the 
  leaves 
  of 
  GauUheria, 
  Arctostaphylos, 
  

  

  