﻿OF 
  BRITISH 
  FUNGI. 
  138 
  

  

  67. 
  Peridium 
  membranaceous, 
  bark 
  adnate, 
  breaking 
  

  

  up 
  into 
  scales 
  or 
  warts. 
  Base 
  sterile. 
  

  

  Lycoperdon, 
  Tourn. 
  

  

  68. 
  Peridium 
  firm, 
  veined 
  internally. 
  Spores 
  large, 
  

  

  grauulated. 
  Scleroderma, 
  Pers. 
  

  

  69. 
  Common 
  peridium 
  simple, 
  interior 
  divided 
  into 
  

  

  cells 
  filled 
  with 
  peridiola. 
  Polysaccum, 
  DC. 
  

  

  70. 
  Peridium 
  naked, 
  thick, 
  at 
  length 
  hollow. 
  

  

  Cenococcum, 
  Fr. 
  

  

  Order 
  X.— 
  MYXOGASTRES. 
  Dust 
  Fungi. 
  

  

  At 
  first 
  pulpy 
  ; 
  afterwards 
  filled 
  with 
  threads 
  and 
  

   dust-like 
  spores. 
  

  

  Genera. 
  

  

  71. 
  Peridium 
  double, 
  persistent, 
  warty 
  or 
  mealy. 
  

  

  Flocci 
  delicate, 
  adnate. 
  Lycogala, 
  Mich. 
  

  

  72. 
  Peridium 
  simple, 
  fugitive, 
  naked. 
  Plocci 
  flat, 
  sub- 
  

  

  reticulate. 
  Beticularia, 
  Bull. 
  

  

  73. 
  Peridium 
  with 
  a 
  floccose 
  coat. 
  Flocci 
  interwoven. 
  

  

  ^Ethalium, 
  Link. 
  

  

  74. 
  Peridium 
  simple, 
  crustaceous. 
  Spores 
  enclosed 
  in 
  

  

  the 
  folds 
  of 
  a 
  membrane. 
  Spumaria, 
  Pers. 
  

  

  75. 
  Peridium 
  double, 
  external 
  smooth, 
  internal 
  eva- 
  

  

  nescent. 
  Flocci 
  adnate. 
  Diderma, 
  Pers. 
  

  

  76. 
  Peridium 
  scaly 
  or 
  floccose. 
  Bursting 
  irregularly. 
  

  

  Didymium, 
  Schrad. 
  

  

  77. 
  Peridium 
  delicate, 
  smooth. 
  Columella 
  absent. 
  

  

  Puysarum 
  Pert. 
  

  

  