﻿52 
  TWENTY 
  -NINTH 
  KEPORT 
  ON 
  THE 
  STATE 
  MUSEUM. 
  

  

  slender 
  septate 
  threads 
  ; 
  capitulum 
  expanded, 
  truncate 
  ; 
  spores 
  ellip- 
  

   tical, 
  attenuated 
  towards 
  either 
  end. 
  

  

  Dead 
  branches 
  of 
  apple 
  trees. 
  Center. 
  May. 
  

  

  Periconia 
  corticalis 
  C. 
  <& 
  P. 
  n. 
  sj>. 
  

  

  Scattered, 
  black 
  ; 
  stem 
  erect, 
  rigid, 
  composed 
  of 
  slender 
  septate 
  

   threads 
  which 
  are 
  free 
  at 
  the 
  apex 
  forming 
  a 
  subglobose 
  head 
  and 
  

   bearing 
  at 
  the 
  tips 
  minute 
  globose 
  spores, 
  .00012' 
  in 
  diameter. 
  

  

  Bark 
  of 
  Thuja 
  occidentalis. 
  Adirondack 
  Mts. 
  July. 
  

  

  Helminthospoeium 
  oosporum 
  Cd. 
  

   Dead 
  stems 
  of 
  grape 
  vines. 
  Watkins. 
  September. 
  

  

  Helminthosporium 
  episph^ericum 
  C. 
  dk 
  P. 
  n. 
  sp. 
  

  

  Flocci 
  rather 
  long, 
  tufted, 
  slender, 
  flexuous, 
  septate, 
  rarely 
  

   branched, 
  blackish-brown; 
  spores 
  oblong-clavate, 
  three 
  to 
  four 
  sep- 
  

   tate, 
  .002-.003' 
  long, 
  truncate 
  at 
  the 
  apex, 
  the 
  second 
  and 
  third 
  cells 
  

   from 
  the 
  top 
  generally 
  more 
  highly 
  colored 
  than 
  the 
  others. 
  

  

  On 
  some 
  effete 
  Diatrype. 
  Albany. 
  August. 
  (PL 
  2, 
  figs. 
  18-20.) 
  

  

  Cercospora 
  Callje 
  P. 
  db 
  C..n. 
  sp. 
  

  

  Spots 
  definite, 
  narrow, 
  oblong, 
  pallid; 
  flocci 
  ainphigenous, 
  minutely 
  

   tufted, 
  short, 
  flexuous, 
  somewhat 
  nodulose, 
  not 
  at 
  all 
  or 
  indistinctly 
  

   septate, 
  slightly 
  colored, 
  cinereous 
  or 
  subolivaceous 
  in 
  the 
  mass 
  ; 
  

   spores 
  colorless, 
  terminal, 
  at 
  first 
  simple, 
  then 
  elongated 
  and 
  one 
  to 
  

   five-septate, 
  nearly 
  straight, 
  cylindrical 
  or 
  obclavate, 
  .001-003' 
  long. 
  

  

  Living 
  leaves 
  of 
  Calla 
  palustris. 
  Buffalo. 
  Clinton. 
  August. 
  

  

  Peronospora 
  pygm^ia 
  Ting. 
  

  

  Leaves 
  of 
  Anemone 
  Pennsylvania. 
  Bethlehem. 
  May 
  and 
  June. 
  

  

  Peronospora 
  effusa 
  Grev. 
  

  

  Leaves 
  of 
  Chenopodium 
  album. 
  West 
  Albany. 
  August 
  and 
  Sept. 
  

  

  Bamularia 
  Nemopanthis 
  C. 
  & 
  P. 
  n. 
  sp. 
  

  

  Spots 
  brownish, 
  rather 
  irregular 
  ; 
  flocci 
  hypophyllous, 
  fasciculate, 
  

  

  short, 
  delicate 
  ; 
  spores 
  fusiform 
  or 
  cylindrical, 
  .0008' 
  long, 
  .0002' 
  broad. 
  

  

  Living 
  leaves 
  of 
  Nemopanthes 
  Canadensis. 
  Buffalo. 
  Clinton. 
  

   Kasoag. 
  July. 
  

  

  PoLYACTIS 
  PULVINATA 
  B. 
  & 
  C. 
  

  

  Dead 
  trunks 
  and 
  branches 
  of 
  alders. 
  Center. 
  October. 
  

  

  Oidium 
  leucoconium 
  Desm. 
  

  

  Living 
  rose 
  leaves. 
  Conservatoiies, 
  Buffalo. 
  Clinton. 
  

   Wild 
  rose 
  leaves. 
  West 
  Albany. 
  July 
  and 
  November. 
  

  

  