﻿GLOSSARY 
  

  

  Abortive. 
  Imperfectly 
  developed, 
  as 
  in 
  abortive 
  stamens. 
  

  

  Absorption. 
  Act 
  of 
  taking 
  in 
  substances 
  through 
  the 
  tissues. 
  

  

  Accessory 
  fruits. 
  Fruits 
  reenforced 
  by 
  ripening 
  of 
  stem 
  or 
  other 
  struc- 
  

   tures 
  together 
  with 
  ordinary 
  fruits, 
  as 
  in 
  strawberry, 
  apple, 
  pear, 
  quince. 
  

  

  Adventitious 
  buds. 
  Buds 
  that 
  spring 
  from 
  various 
  parts 
  of 
  the 
  root 
  

   or 
  stem, 
  not 
  from 
  nodes. 
  

  

  Aerial 
  roots. 
  Roots 
  that 
  develop 
  in 
  the 
  air. 
  

  

  Akene. 
  A 
  small, 
  dry, 
  one-seeded 
  fruit 
  in 
  which 
  the 
  ovary 
  wall 
  adheres 
  

   to 
  the 
  seed, 
  as 
  in 
  sunflower, 
  dandelion, 
  and 
  grains 
  of 
  common 
  cereals. 
  

  

  Albuminous 
  seeds. 
  Seeds 
  that, 
  when 
  ripe, 
  contain 
  endosperm. 
  

  

  Aleurone. 
  Grains 
  of 
  definite 
  structure 
  containing 
  protein 
  food; 
  aleu- 
  

   rone 
  grains 
  are 
  often 
  found 
  in 
  a 
  single 
  layer 
  of 
  regular 
  cells 
  just 
  within 
  

   the 
  seed 
  coat. 
  

  

  Alternation 
  of 
  generations. 
  Alternating 
  of 
  a 
  sexual 
  and 
  a 
  sexless 
  gen- 
  

   eration 
  in 
  the 
  life 
  cycle 
  of 
  a 
  plant. 
  

  

  Ament. 
  The 
  flower 
  cluster 
  of 
  trees 
  and 
  shrubs, 
  such 
  as 
  oak, 
  willow, 
  etc. 
  

  

  Anabolism. 
  Building-up 
  processes; 
  making 
  and 
  assimilating 
  food 
  

   materials. 
  

  

  Anaerobes. 
  Plants 
  that 
  cannot 
  carry 
  on 
  their 
  life 
  processes 
  in 
  presence 
  

   of 
  ordinary 
  air. 
  

  

  Anatropous 
  (turned 
  up). 
  Applied 
  to 
  ovules 
  or 
  seeds 
  that 
  grow 
  in 
  an 
  

   inverted 
  position. 
  

  

  AndroBcium 
  (male 
  household). 
  Stamens 
  of 
  a 
  flower 
  collectively; 
  this 
  

   name 
  was 
  given 
  when 
  stamens 
  were 
  thought 
  to 
  be 
  male 
  sex 
  organs. 
  

  

  Anemophilous 
  flowers 
  (wind-loving 
  flowers). 
  Those 
  whose 
  fertiliza- 
  

   tion 
  is 
  effected 
  by 
  means 
  of 
  the 
  wind. 
  

  

  Angiosperms 
  (inclosed 
  seeds). 
  One 
  of 
  the 
  two 
  groups 
  of 
  spermato- 
  

   phytes 
  (seed 
  plants). 
  

  

  Annulus 
  (a 
  ring). 
  The 
  elastic 
  ring 
  of 
  cells 
  around 
  the 
  sporangium 
  

   in 
  ferns. 
  

  

  Anther. 
  The 
  pollen-bearing 
  part 
  of 
  the 
  stamen. 
  

  

  Antheridiophores. 
  Stalks 
  npon 
  which 
  antheridia 
  are 
  borne. 
  

  

  Antheridium 
  ; 
  pi. 
  antheridia. 
  The 
  male 
  sex 
  organ 
  in 
  the 
  lower 
  groups 
  

   of 
  plants. 
  

  

  Antherozoid. 
  See 
  Sperm. 
  

  

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