﻿REPORT 
  OF 
  THE 
  BOTANIST. 
  

  

  79 
  

  

  Sphserotheca 
  Castagnei 
  Lev 
  

  

  S. 
  

  

  \ 
  

  

  Cercospora 
  Callse 
  P. 
  <& 
  O 
  Calla 
  palustris. 
  

  

  Peronospora 
  pygmsea 
  Ting 
  Anemone 
  Pennsylvania. 
  

  

  P. 
  parasitica 
  Pers 
  Cardamine 
  rhomboidea. 
  

  

  P. 
  Geranii 
  Pk 
  Geranium 
  maculatum. 
  

  

  P. 
  obliqua 
  Ok 
  . 
  . 
  Eumex 
  crispus. 
  

  

  P. 
  effnsa 
  Grev 
  Chenopodium 
  album. 
  

  

  Ramularia 
  Nemopanthis 
  C. 
  & 
  P 
  . 
  . 
  . 
  . 
  Nemopanthes 
  Canadensis. 
  

  

  In 
  the 
  last 
  family, 
  the 
  Ascomyoetes, 
  we 
  find 
  a 
  few 
  groups, 
  such 
  as 
  

   the 
  Perisporiacei 
  or 
  mildews 
  and 
  the 
  species 
  of 
  Rhytisma, 
  inhabiting, 
  

   for 
  the 
  most 
  part, 
  living 
  leaves. 
  But 
  by 
  far 
  the 
  greater 
  part 
  of 
  this 
  

   vast 
  family 
  find 
  their 
  dwelling-place 
  on 
  decaying 
  substances. 
  

  

  In 
  the 
  Perisporiacei 
  a 
  white 
  webby 
  film 
  usually 
  appears 
  on 
  the 
  

  

  leaf, 
  and 
  sometimes, 
  as 
  in 
  the 
  pea 
  mildew, 
  this 
  involves 
  the 
  whole 
  

  

  plant. 
  

  

  "Spiraea 
  opulifolia. 
  

   Poterium 
  Canadense. 
  

   Agrimonia 
  Eupatoria. 
  

   Geum 
  album. 
  

   Bidens 
  connata. 
  

   Erechtithes 
  hieracifolia. 
  

   Taraxacum 
  Dens-leonis. 
  

   Brunella 
  vulgaris. 
  

  

  pruinosa 
  O. 
  da 
  P 
  Rhus 
  glabra. 
  

  

  Magnolia 
  acuminata. 
  

   Liriodendron 
  Tulipifera. 
  

   Ribes 
  Cynosbati. 
  

   Celastrus 
  scandens. 
  

   Corn 
  us 
  florida. 
  

   C. 
  paniculata. 
  

   0. 
  stolonifera. 
  

   C. 
  circinata. 
  

  

  Phyllactinia 
  guttata 
  Lev 
  -J 
  Cratsegus 
  coccinea. 
  

  

  C. 
  Crus-galli. 
  

   Corylus 
  Americana. 
  

   Castanea 
  vesca. 
  

   Fagus 
  ferruginea. 
  

   Carpi 
  n 
  us 
  Americana. 
  

   Fraxinus 
  Americana. 
  

   Alnus 
  serrulata. 
  

   Asclepias 
  Cornuti. 
  

   ( 
  Salix 
  cordata. 
  

  

  Uncinula 
  adunca 
  Lev 
  I 
  S. 
  discolor. 
  

  

  ( 
  Populus 
  balsamifera. 
  

   I 
  Acer 
  spicatum. 
  

  

  circinata 
  C. 
  & 
  P 
  I 
  A. 
  rubrum. 
  

  

  ( 
  A. 
  Pennsylvanicum. 
  

   luculenta 
  Howe 
  Populus 
  heterophylla. 
  

  

  U. 
  

  

  u. 
  

  

  