﻿258 
  

  

  INTRODUCTION 
  TO 
  BOTANY 
  

  

  to 
  the 
  stalk 
  beneath 
  by 
  means 
  of 
  a 
  layer 
  of 
  hyplne 
  (the 
  veiT). 
  

   In 
  some 
  species, 
  when 
  the 
  veil 
  breaks 
  a\vay 
  from 
  the 
  pileus, 
  

   it 
  forms 
  a 
  ring, 
  or 
  annulus, 
  about 
  the 
  stalk. 
  

  

  The 
  underside 
  of 
  the 
  pileus 
  is 
  made 
  up 
  of 
  plate-like 
  growths 
  

   (7//7/N) 
  which 
  radiate 
  from 
  the 
  stalk. 
  Some 
  of 
  the 
  hyphaj 
  

   which 
  compose 
  the 
  gills 
  extend 
  from 
  the 
  surface 
  of 
  the 
  gill, 
  

  

  FIG. 
  200. 
  A 
  poisonous 
  fungus 
  (Amanita 
  muscaria) 
  

   From 
  A. 
  H. 
  R. 
  Bailer's 
  "Researches 
  on 
  Fungi" 
  

  

  and 
  upon 
  this 
  extended 
  tip 
  (the 
  basidium, 
  or 
  stalk) 
  four 
  

   (rarely 
  two) 
  branches 
  are 
  formed. 
  Upon 
  the 
  tip 
  of 
  each 
  

   branch 
  a 
  spore 
  (basidiospore) 
  is 
  formed 
  (fig. 
  201). 
  When 
  the 
  

   spores 
  fall 
  upon 
  moist, 
  warm, 
  nutrient 
  material, 
  they 
  produce 
  

   a 
  new 
  mycelium. 
  If 
  the 
  pileus 
  of 
  a 
  ripe 
  mushroom 
  is 
  cut 
  from 
  

   the 
  stalk 
  mid 
  placed, 
  with 
  the 
  gills 
  downward, 
  upon 
  apiece 
  of 
  

   ordinary 
  white 
  or 
  blank 
  paper, 
  after 
  a 
  few 
  hours 
  a 
  spore 
  print 
  

   composed 
  of 
  thousands 
  of 
  spores 
  will 
  be 
  made. 
  

  

  