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pteridophytamore about pteridophyta

pteridophyta

 

  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Pteridophyta  \Pter`i*doph"y*ta\,  n.  pl  [NL.,  from  Gr  ?,  ?,  a 
  fern  +  ?  a  plant.]  (Bot.) 
  A  class  of  flowerless  plants,  embracing  ferns,  horsetails, 
  club  mosses,  quillworts,  and  other  like  plants.  See  the  Note 
  under  {Cryptogamia}.  --  {Pter"i*do*phyte`},  n. 
 
  Note:  This  is  a  modern  term,  devised  to  replace  the  older 
  ones  acrogens  and  vascular  Cryptogamia. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Vascular  \Vas"cu*lar\,  a.  [L.  vasculum  a  small  vessel,  dim.  of 
  vas  vessel:  cf  F.  vasculaire  See  {Vase},  and  cf  Vessel.] 
  1.  (Biol.) 
  a  Consisting  of  or  containing,  vessels  as  an  essential 
  part  of  a  structure;  full  of  vessels;  specifically 
  (Bot.),  pertaining  to  or  containing,  special  ducts, 
  or  tubes,  for  the  circulation  of  sap. 
  b  Operating  by  means  of  or  made  up  of  an  arrangement 
  of  vessels;  as  the  vascular  system  in  animals, 
  including  the  arteries,  veins,  capillaries,  lacteals, 
  etc 
  c  Of  or  pertaining  to  the  vessels  of  animal  and 
  vegetable  bodies;  as  the  vascular  functions. 
 
  2.  (Bot.)  Of  or  pertaining  to  the  higher  division  of  plants, 
  that  is  the  ph[ae]nogamous  plants,  all  of  which  are 
  vascular,  in  distinction  from  the  cryptogams,  which  to  a 
  large  extent  are  cellular  only. 
 
  {Vascular  plants}  (Bot.),  plants  composed  in  part  of  vascular 
  tissue,  as  all  flowering  plants  and  the  higher 
  cryptogamous  plants,  or  those  of  the  class  {Pteridophyta}. 
  Cf  {Cellular  plants},  {Cellular}. 
 
  {Vascular  system}  (Bot.),  the  body  of  associated  ducts  and 
  woody  fiber;  the  fibrovascular  part  of  plants. 
 
  {Vascular  tissue}  (Bot.),  vegetable  tissue  composed  partly  of 
  ducts,  or  sap  tubes. 
 
  {Water  vascular  system}  (Zo["o]l.),  a  system  of  vessels  in 
  annelids,  nemerteans,  and  many  other  invertebrates, 
  containing  a  circulating  fluid  analogous  to  blood,  but  not 
  of  the  same  composition.  In  annelids  the  fluid  which  they 
  contain  is  usually  red,  but  in  some  it  is  green,  in  others 
  yellow,  or  whitish. 
 
  From  WordNet  r  1.6  [wn]: 
 
  Pteridophyta 
  n  :  containing  all  the  vascular  plants  that  do  not  bear  seeds: 
  ferns,  horsetails,  club  mosses,  and  whisk  ferns;  in  some 
  classifications  considered  a  subdivision  of  Tracheophyta 
  [syn:  {Pteridophyta},  {division  Pteridophyta}]




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