﻿266 
  

  

  BOTANICAL 
  GAZETTE. 
  

  

  [ 
  October, 
  

  

  The 
  bundles 
  appear 
  when 
  the 
  fruit 
  is 
  first 
  formed, 
  and 
  change 
  

   their 
  relative 
  position 
  somewhat 
  as 
  development 
  progresses, 
  

   The 
  loculi 
  vary 
  in 
  number 
  in 
  difierent 
  lemons 
  ; 
  some 
  speci- 
  

   mens 
  having 
  seven 
  or 
  eight 
  and 
  others 
  as 
  many 
  as 
  eleven 
  or 
  

   twelve. 
  Each 
  loculus 
  represents 
  a 
  carpellary 
  leaf. 
  The 
  

   leaf 
  is 
  folded 
  with 
  the 
  upper 
  surface 
  inward 
  toward 
  the 
  axis. 
  

   The 
  margins 
  are 
  again 
  folded 
  where 
  they 
  meet 
  and 
  project 
  

   a 
  short 
  distance 
  away 
  from 
  the 
  axis 
  about 
  which 
  the 
  car- 
  

   pellary 
  leaves 
  are 
  gathered. 
  These 
  infolded 
  margins 
  form 
  

   the 
  placentce 
  upon 
  which 
  the 
  ovules 
  are 
  borne. 
  The 
  ovules 
  

   appear 
  at 
  a 
  very 
  early 
  stage 
  of 
  development. 
  The 
  nucleus 
  

   is 
  first 
  seen 
  toward 
  the 
  top, 
  but 
  it 
  afterwards 
  grows 
  towards 
  

   the 
  base. 
  Two 
  rows 
  are 
  in 
  each 
  loculus, 
  one 
  upon 
  either 
  

   margin 
  of 
  the 
  carpellary 
  leaf. 
  Often 
  only 
  one 
  ovule 
  de- 
  

   velops, 
  sometimes 
  neither 
  ; 
  for 
  this 
  cause 
  the 
  number 
  of 
  

   seeds 
  in 
  different 
  specimens 
  varies 
  much. 
  In 
  a 
  young 
  fruit, 
  

   4 
  mm. 
  in 
  diameter, 
  the 
  ovules 
  are 
  quite 
  large, 
  having 
  two 
  

   walls 
  enclosing 
  a 
  nucleus. 
  Fig. 
  8 
  shows 
  a 
  cross 
  section 
  

   of 
  a 
  loculus 
  with 
  both 
  ovules 
  developing 
  ; 
  the 
  section 
  is 
  

   such 
  that 
  the 
  ovules 
  are 
  cut 
  near 
  the 
  upper 
  part, 
  exposing 
  

   the 
  nuclei 
  of 
  the 
  young 
  seeds. 
  The 
  spongy 
  center 
  column 
  

   torming 
  the 
  axis 
  of 
  the 
  lemon 
  is 
  a 
  development 
  from 
  the 
  m- 
  

  

  gins 
  of 
  the 
  leaf. 
  The 
  pulp 
  clubs 
  are 
  

  

  from 
  the 
  leaf 
  hairs, 
  and 
  first 
  appear 
  as 
  blunt 
  protuberances 
  

   trom 
  the 
  back 
  wall 
  of 
  the 
  loculus. 
  Thev 
  gradually 
  enlarge 
  

   and 
  elongate 
  until 
  they 
  fill 
  up 
  the 
  space 
  olf 
  the 
  loculus 
  crowd- 
  

   ing 
  about 
  the 
  seeds 
  and 
  lying 
  close 
  upon 
  one 
  another, 
  but 
  

   not 
  structurely 
  united. 
  ^ 
  ^ 
  ^ 
  

  

  . 
  From 
  all 
  this 
  we 
  see 
  that 
  everv 
  part 
  of 
  the 
  fruit 
  has 
  its 
  

   origin 
  from 
  some 
  part 
  of 
  the 
  leaf. 
  " 
  

  

  p„i 
  u''°^^ 
  ""^^^'"^^ 
  through 
  a 
  pistil 
  shows 
  a 
  set 
  of 
  fibro-vas- 
  

   cuJar 
  bundles 
  in 
  a 
  circle 
  about 
  half 
  way 
  between 
  the 
  center 
  

   and 
  the 
  perimeter. 
  The 
  bundles 
  are 
  of 
  a 
  complicated 
  struct- 
  

  

  die'n 
  '"^ 
  ^^^jded 
  by 
  rows 
  of 
  small 
  empty 
  cells. 
  Jew 
  

   neL/^7 
  ?^ 
  °^ 
  t^^^ 
  pistil 
  only 
  one 
  circle 
  of 
  bundles 
  aP' 
  

   Peais; 
  farther 
  down 
  another 
  circle 
  makes 
  its 
  appearanc 
  

  

  The 
  inner 
  circle 
  see^^ 
  

  

  the 
  fru"' 
  

  

  npnroK 
  tu 
  "^"" 
  diioiner 
  circi 
  

  

  to 
  rnn.- 
  P^?"^^ter 
  of 
  the 
  section, 
  

   to 
  continue 
  

  

  Another 
  section 
  

   bundles, 
  the 
  _^„^. 
  

   radius 
  of 
  the 
  pistil. 
  

  

  in 
  dhmet°"K^'"^^^ 
  ^^^^ 
  ^PP«^- 
  end 
  of 
  a 
  lemon 
  one-half 
  "J^^^ 
  

   surtndS" 
  bvT 
  ^ 
  l' 
  fibro-7ascular 
  bundles 
  as 
  narrow 
  ^^^ 
  

  

  unciect 
  by 
  regular 
  rows 
  of 
  cells, 
  the 
  row 
  next 
  the 
  dei 
  

  

  