﻿1890.] 
  BOTANICAL 
  GAZETTE. 
  267 
  

  

  center 
  being 
  filled 
  with 
  a 
  granular 
  substance 
  (fig. 
  9). 
  

   Around 
  this 
  row 
  are 
  one 
  or 
  two 
  regular 
  rows 
  of 
  thick-walled 
  

   cells 
  and 
  others 
  irregularl}- 
  arranged. 
  Near 
  the 
  perimeter 
  

   of 
  the 
  section 
  are 
  the 
  oil 
  glands 
  formed 
  by 
  regular 
  rows 
  of 
  

   rather 
  narrow, 
  elongated, 
  rectangular 
  cells 
  ; 
  and 
  about 
  these 
  

   are 
  irregularly 
  arranged 
  cells. 
  Next 
  the 
  perimeter 
  the 
  cells 
  

   are 
  small, 
  but 
  the 
  size 
  increases 
  further 
  inward 
  to 
  the 
  fibro- 
  

   vascular 
  bundles, 
  between 
  which, 
  and 
  in 
  the 
  center 
  column, 
  

   the 
  cells 
  are 
  smaller. 
  

  

  A 
  section 
  through 
  the 
  same 
  specimen 
  at 
  the 
  beginning 
  of 
  

   theloculi 
  shows 
  some 
  small 
  fibro-vascular 
  bundles 
  surrounded 
  

   by 
  very 
  small, 
  empty, 
  thin-walled 
  cells. 
  The 
  bundles 
  in 
  the 
  

   center 
  column 
  are 
  broad 
  and 
  narrow, 
  but 
  further 
  into 
  the 
  in- 
  

   terior 
  of 
  the 
  fruit 
  they 
  become 
  rounded 
  and 
  smaller. 
  The 
  

   oil 
  glands 
  are 
  well 
  developed. 
  

  

  Explanation 
  of 
  Plate 
  XVI.— 
  Fig. 
  1. 
  Cross 
  section 
  of 
  mature 
  lemon, 
  

   showing 
  half 
  the 
  section; 
  a, 
  yellow 
  part 
  of 
  rind; 
  h, 
  white 
  part 
  of 
  rind; 
  c. 
  

   loculus 
  filled 
  with 
  pulp; 
  d, 
  spongy 
  center 
  colnmn 
  ; 
  e, 
  double 
  wall 
  of 
  the 
  

   loculi; 
  / 
  and 
  g, 
  fibro 
  vascular 
  bundles. 
  Fig 
  2. 
  Cross 
  section 
  of 
  young 
  

   fruit 
  3.5 
  mm. 
  in 
  diam.; 
  rt, 
  loculus; 
  6, 
  ovule; 
  c, 
  center 
  column; 
  d. 
  fibro- 
  

   vasculai 
  bundle; 
  e, 
  oil 
  gland; 
  d', 
  fibro 
  vascular 
  bundles 
  of 
  rind; 
  /, 
  rind, 
  

   % 
  3. 
  Cells 
  of 
  wall 
  of 
  pulp 
  club. 
  Fig. 
  4. 
  Cells 
  containing 
  juice 
  in 
  the 
  

   pulp 
  clubs. 
  Fig. 
  5. 
  Leaf; 
  a, 
  midvein; 
  6, 
  smaller 
  veins; 
  e, 
  marginal 
  

   ^ein 
  ; 
  c', 
  submarginal 
  vein. 
  Fig. 
  6. 
  Back 
  of 
  loculus 
  ; 
  a, 
  large 
  fibro 
  vas- 
  

   cular 
  bundle 
  ; 
  6, 
  smaller 
  bundles 
  forming 
  a 
  network. 
  Fig. 
  7. 
  Side 
  view 
  

   w 
  loculus 
  ; 
  a, 
  a, 
  curved 
  libro-vascular 
  bundle 
  ; 
  b, 
  back 
  of 
  loculus 
  ; 
  c, 
  mmute 
  

   bundles 
  seen 
  in 
  side 
  wall 
  of 
  loculus. 
  Fig. 
  8. 
  Loculus 
  showing 
  both 
  

   ovules 
  developing, 
  the 
  section 
  being 
  such 
  that 
  the 
  nuclei 
  are 
  exposed 
  ; 
  a, 
  

   'oculus; 
  h, 
  nucleus 
  of 
  seed 
  ; 
  c, 
  inner 
  wall 
  about 
  nucleus; 
  e', 
  outer 
  wall 
  of 
  

   o^ule 
  ; 
  a^, 
  ovule. 
  Fig 
  9. 
  Section 
  through 
  upper 
  end 
  of 
  lemon 
  \ 
  in. 
  in 
  

   «'am.; 
  a, 
  epidermis; 
  6, 
  cells 
  about 
  oil 
  gland 
  c/ 
  d, 
  cells 
  of 
  rind 
  ; 
  «, 
  dense 
  

   center 
  of 
  fibro-vascular 
  bundle; 
  /, 
  cells 
  about 
  center. 
  

  

  ChatnpmPH, 
  III. 
  

  

  EDITORIAL. 
  

  

  The 
  appea 
  range 
  of 
  Dr. 
  Mer 
  riam's 
  report 
  of 
  a 
  biological 
  survey 
  of 
  the 
  

   *au 
  Francisco 
  mountain 
  redon 
  of 
  Arizona 
  (noticed 
  elsewhere 
  in 
  this 
  

   ^utnber) 
  suggests 
  a 
  timely 
  topic 
  for 
  botanists 
  to 
  consider. 
  This 
  same 
  

   "Object 
  was 
  prominently 
  before 
  the 
  botanists 
  of 
  the 
  American 
  Association 
  

   « 
  their 
  Indianapolis 
  meeting, 
  in 
  considering 
  the 
  geographical 
  diBtnbu- 
  

   «on 
  of 
  North 
  American 
  plants. 
  The 
  notion 
  that 
  a 
  plant 
  is 
  only 
  valuable 
  

   ^c*U8e 
  it 
  is 
  a 
  new 
  or 
  rare 
  species.and 
  that 
  it 
  makes 
  no 
  special 
  difference 
  

   "^ 
  to 
  Its 
  exact 
  locality, 
  its 
  soil 
  conditions, 
  or 
  its 
  altitude, 
  is 
  one 
  that 
  shoum 
  

  

  