﻿Occurrence 
  of 
  Multinucleate 
  Cells 
  in 
  Vegetative 
  Tissues. 
  

  

  9 
  

  

  Text-Fig. 
  1. 
  — 
  Asparagus 
  officinalis, 
  L. 
  Cells 
  of 
  ground 
  tissue 
  between 
  the 
  bundles 
  from 
  

   a 
  transverse 
  section 
  across 
  the 
  " 
  head 
  " 
  of 
  a 
  shoot 
  gathered 
  on 
  May 
  6, 
  1916. 
  

   ( 
  x 
  535 
  circa.) 
  One 
  phragmosphere 
  (ph{) 
  is 
  seen 
  at 
  an 
  early 
  stage 
  of 
  development 
  

   in 
  a 
  cell 
  containing 
  two 
  resting 
  nuclei 
  ; 
  a 
  second 
  Q»A 
  2 
  ) 
  is 
  at 
  a 
  more 
  advanced 
  stage 
  

   of 
  development 
  in 
  a 
  cell 
  containing 
  one 
  resting 
  nucleus 
  ; 
  a 
  third 
  (ph 
  2 
  ) 
  is 
  only 
  seen 
  

   in 
  fragmentary 
  tangential 
  section. 
  Two 
  cells 
  (c) 
  are 
  uninucleate 
  ; 
  these 
  are 
  

   obviously 
  young 
  cells 
  which 
  have 
  recently 
  divided 
  from 
  one 
  another. 
  

  

  Text-Fig. 
  2.— 
  Asparagus 
  officinalis, 
  L. 
  Cells 
  of 
  ground 
  tissue 
  between 
  the 
  bundles 
  from 
  

   a 
  transverse 
  section 
  3-4 
  mm. 
  below 
  the 
  base 
  of 
  the 
  " 
  head 
  " 
  of 
  the 
  same 
  shoot 
  as 
  

   that 
  from 
  which 
  the 
  section 
  represented 
  in 
  Text-fig. 
  1 
  was 
  taken. 
  ( 
  x 
  535 
  circa.) 
  

   Progressive 
  wall 
  formation 
  is 
  going 
  on 
  in 
  cell 
  a, 
  simultaneously 
  with 
  phragmosphere 
  

   formation 
  in 
  cells 
  b 
  and 
  c. 
  Just 
  as 
  in 
  Text-fig. 
  1, 
  the 
  only 
  uninucleate 
  cells 
  are 
  a 
  

   pair 
  which 
  have 
  been 
  recently 
  formed 
  (rl 
  and 
  a 
  7 
  '). 
  

  

  