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spermatophytamore about spermatophyta

spermatophyta


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Spermatophyta  \Sper`ma*toph"y*ta\,  n.  pl  [NL.;  spermato-  +  Gr 
  ?  plant.]  (Bot.) 
  A  phylum  embracing  the  highest  plants,  or  those  that  produce 
  seeds;  the  seed  plants,  or  flowering  plants.  They  form  the 
  most  numerous  group  including  over  120,000  species.  In 
  general,  the  group  is  characterized  by  the  marked  development 
  of  the  sporophyte,  with  great  differentiation  of  its  parts 
  (root,  stem,  leaves,  flowers,  etc.);  by  the  extreme  reduction 
  of  the  gametophyte;  and  by  the  development  of  seeds.  All  the 
  Spermatophyta  are  heterosporous;  fertilization  of  the  egg 
  cell  is  either  through  a 
 
  {pollen  tube}  emitted  by  the  microspore  or  (in  a  few 
  gymnosperms)  by  spermatozoids. 
 
  Note:  The  phrase  ``flowering  plants''  is  less  distinctive 
  than  ``seed  plants,''  since  the  conifers,  grasses, 
  sedges,  oaks,  etc.,  do  not  produce  flowers  in  the 
  popular  sense  For  this  reason  the  terms  {Anthrophyta}, 
  {Ph[ae]nogamia},  and  {Panerogamia}  have  been  superseded 
  as  names  of  the  phylum  by  Spermatophyta. 
 
  From  WordNet  r  1.6  [wn]: 
 
  Spermatophyta 
  n  :  seed  plants;  comprises  the  Angiospermae  (or  Magnoliophyta) 
  and  Gymnospermae  (or  Gymnospermophyta);  in  some 
  classification  systems  Spermatophyta  is  coordinate  with 
  Pteridophyta  (spore  producing  plants  having  vascular 
  tissue  and  roots)  and  Bryophyta  (spore  producing  plants 
  lacking  vascular  tissue  and  roots)  [syn:  {Spermatophyta}, 
  {division  Spermatophyta}] 




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