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  INTRODUCTION 
  TO 
  BOTANY 
  

  

  Stamen. 
  The 
  microsporophyll 
  in 
  sperm 
  atophytes. 
  

   Stigma. 
  That 
  portion 
  of 
  the 
  surface 
  of 
  a 
  pistil 
  (without 
  epidermis) 
  

   which 
  receives 
  the 
  pollen. 
  

  

  Stigmatic. 
  Relating 
  to 
  the 
  stigma, 
  or 
  stigma-like. 
  

   Stoma 
  (a 
  mouth) 
  ; 
  pi. 
  stomata. 
  Epidermal 
  structures 
  which 
  serve 
  for 
  

   facilitating 
  gaseous 
  interchanges 
  with 
  the 
  external 
  air, 
  and 
  for 
  trans- 
  .j- 
  

   ration 
  of 
  moisture. 
  They 
  are 
  often 
  incorrectly 
  called 
  " 
  breathing 
  pores." 
  

  

  Strobilus. 
  A 
  cone-like 
  cluster 
  of 
  sporophylls. 
  

  

  Style. 
  The 
  usually 
  attenuated 
  portion 
  of 
  the 
  pistil 
  which 
  bears 
  the 
  

   stigma. 
  

  

  Succulent. 
  Thick 
  and 
  ilesliv. 
  

  

  Suspensor. 
  A 
  chain 
  of 
  cells 
  which 
  develops 
  earh 
  from 
  the 
  oospore, 
  

   and 
  serves 
  to 
  push 
  the 
  cinnryo 
  cell 
  deep 
  within 
  the 
  embryo 
  sac. 
  

  

  Symbiont. 
  One 
  of 
  the 
  organisms 
  that 
  has 
  entered 
  into 
  a 
  symbiotic 
  

   relationship. 
  

  

  Symbiosis 
  (living 
  together). 
  Applied 
  to 
  a 
  condition 
  in 
  which 
  two 
  or 
  

   more 
  organisms 
  are 
  living 
  in 
  an 
  intimate 
  relationship. 
  

  

  Sympetalous. 
  Having 
  the 
  petals 
  apparently 
  all 
  united, 
  as 
  if 
  grown 
  

   together 
  by 
  their 
  edges. 
  

  

  Syncarpous 
  (carpels 
  united). 
  Applied 
  to 
  those 
  conditions 
  in 
  which 
  

   the 
  carpels 
  have 
  united 
  into 
  a 
  compound 
  pistil. 
  

  

  Synergids 
  (helpers). 
  The 
  two 
  nucleated 
  bodies 
  which 
  accompany 
  the 
  

   oosphere 
  in 
  the 
  embryo 
  sac, 
  and 
  together 
  with 
  it 
  form 
  the 
  egg 
  apparatus. 
  

  

  Testa 
  (a 
  shell). 
  The 
  outer 
  seed 
  coat. 
  

  

  Tetracyclic 
  (four 
  cycles). 
  A].] 
  died 
  to 
  those 
  flowers 
  in 
  which 
  there 
  are 
  

   four 
  cycles 
  of 
  floral 
  organs. 
  

  

  Tetradynamous 
  (four 
  strong). 
  Said 
  of 
  a 
  stamen 
  cluster 
  in 
  which 
  there 
  

   are 
  four 
  long 
  and 
  two 
  shorter 
  stamens. 
  

  

  Thalloid. 
  Thallus-like. 
  

  

  Thallus 
  (a 
  young 
  shoot). 
  The 
  body 
  of 
  lower 
  plants, 
  which 
  exhibits 
  

   no 
  differentiation 
  of 
  stem, 
  leaf, 
  and 
  root. 
  

  

  Tissue. 
  A 
  texture 
  built 
  up 
  of 
  mutually 
  dependent 
  cells 
  of 
  similar 
  

   origin 
  and 
  character, 
  as 
  the 
  cambium 
  layer. 
  

  

  Tracheid. 
  A 
  long, 
  slender 
  cell, 
  with 
  closed 
  ends 
  and 
  its 
  walls 
  thick- 
  

   fiiecl 
  after 
  the 
  cell 
  has 
  attained 
  its 
  full 
  size, 
  as 
  in 
  the 
  pitted 
  cells 
  of 
  

   coniferous 
  wood. 
  

  

  Transpiration. 
  The 
  loss 
  of 
  water 
  derived 
  from 
  the 
  interior 
  of 
  the 
  

   plant 
  body 
  in 
  the 
  form 
  of 
  vapor. 
  The 
  term 
  is 
  not 
  generally 
  used 
  with 
  

   reference 
  to 
  plants 
  of 
  low 
  organization. 
  

  

  Trichome 
  (a 
  hair). 
  A 
  general 
  name 
  for 
  a 
  slender 
  outgrowth 
  from 
  the 
  

   epidermis, 
  usually 
  arising 
  from 
  a 
  single 
  cell. 
  

  

  Turgidity. 
  The 
  normal 
  swollen 
  condition 
  of 
  active 
  cells 
  which 
  results 
  

   from 
  the 
  distension 
  brought 
  about 
  by 
  absorption 
  of 
  water. 
  

  

  