﻿is 
  

  

  INTRODUCTION 
  TO 
  BOTANY 
  

  

  upward 
  irom 
  it; 
  in 
  others 
  the 
  seed 
  coat 
  is 
  carried 
  upon 
  the 
  

   seed 
  leaves 
  until 
  thrv 
  appear 
  above 
  the 
  surface 
  of 
  the 
  ground, 
  

   when 
  liy 
  the 
  spreading 
  of 
  the 
  seed 
  leases 
  the 
  coat 
  is 
  dropped 
  

   (tig. 
  13). 
  Some 
  kinds 
  of 
  plants 
  have 
  one 
  seed 
  l,-;il', 
  as 
  in 
  

   corn; 
  while 
  others, 
  as 
  the 
  sunflower, 
  have 
  two 
  seed 
  leaves, 
  

   between 
  which 
  the 
  first 
  

   true 
  leaves 
  appear. 
  

  

  15. 
  Further 
  study 
  of 
  

   the 
  parts 
  of 
  a 
  plant. 
  Jt 
  

   must 
  be 
  evident 
  from 
  

   the 
  discussion 
  in 
  this 
  

   chapter 
  that 
  a 
  plant 
  is 
  

  

  Seedlings 
  of 
  the 
  

   simtlourr 
  plant 
  

  

  I, 
  "lil 
  seed 
  coat 
  still 
  partly 
  

  

  inclosing 
  the 
  seed 
  leaves; 
  

  

  /.', 
  seed 
  lea\ 
  es 
  IP|M.II 
  and 
  !ir>t. 
  

  

  true 
  leaves 
  appearing 
  

  

  FIG. 
  14. 
  YOUDJJ 
  corn 
  plants 
  

  

  A, 
  leaves 
  unfolding 
  ; 
  /;, 
  leaves 
  and 
  other 
  parts 
  

   well 
  developed 
  

  

  a 
  sort 
  of 
  machine 
  consisting 
  of 
  roots, 
  stem, 
  leaves, 
  flowers, 
  

   and 
  seeds. 
  By 
  means 
  of 
  this 
  plant 
  machine 
  raw 
  materials 
  

   are 
  secured 
  and 
  manufactured 
  into 
  plant 
  food. 
  This 
  manu- 
  

   factured 
  food 
  is 
  distributed 
  through 
  the 
  plant; 
  some 
  of 
  it 
  is 
  

   used 
  immediately 
  and 
  some 
  of 
  it 
  is 
  stored. 
  Seeds 
  are 
  manu- 
  

   faetmvd, 
  and 
  l,\ 
  means 
  of 
  them 
  new 
  plants 
  are 
  started 
  on 
  

   their 
  round 
  of 
  activities. 
  Having 
  in 
  this 
  chapter 
  merely 
  out- 
  

   lined 
  the 
  nature 
  of 
  the 
  plant 
  machine 
  and 
  the 
  work 
  done 
  by 
  

  

  