﻿72 
  TWENTTT-MTNTH 
  EEPORT 
  0^ 
  THE 
  STATE 
  MUSEUM. 
  

  

  inimical 
  to 
  living 
  plants 
  than 
  all 
  the 
  others 
  together. 
  All 
  the 
  species 
  

   of 
  the 
  three 
  orders 
  Pucciniaei, 
  Caeomacei 
  and 
  .zEcidiacei 
  find 
  their 
  

   dwelling 
  place 
  on 
  such 
  plants. 
  They 
  are 
  popularly 
  known 
  by 
  the 
  

   names 
  Rust, 
  Brand, 
  Smut 
  and 
  Cluster 
  cups. 
  Many 
  of 
  them 
  have 
  a 
  

   dual 
  form 
  but 
  usually 
  both 
  forms 
  occur 
  on 
  the 
  same 
  plant. 
  In 
  such 
  

   cases 
  only 
  the 
  second 
  or 
  principal 
  form 
  is 
  given. 
  In 
  Phragmidium 
  

   the 
  spores 
  have 
  a 
  permanent 
  pedicel 
  and 
  two 
  to 
  ten 
  septa 
  according 
  

   to 
  the 
  species. 
  The 
  color 
  of 
  the 
  spores 
  is 
  blackish-brown 
  or 
  black. 
  

   They 
  grow 
  on 
  the 
  stems 
  or 
  leaves. 
  In 
  the 
  earlier 
  condition 
  the 
  

   spores 
  are 
  simple 
  and 
  yellow 
  or 
  orange. 
  These 
  early 
  forms 
  consti- 
  

   tuted 
  the 
  genus 
  Lecythea. 
  

  

  Phragmidium 
  speciosum 
  Fr 
  Rose 
  stems. 
  

  

  P. 
  mucronatum 
  Lk 
  Rose 
  leaves. 
  

  

  P. 
  gracile 
  Gfrev 
  Rubus 
  odoratus. 
  

  

  P. 
  obtusum 
  Lk 
  Potentilla 
  Canadensis. 
  

  

  Triphragmium 
  clavellosum 
  Berk 
  .... 
  Aralia 
  nudicaulis. 
  

  

  In 
  Puccinia 
  the 
  spores 
  have 
  a 
  permanent 
  pedicel 
  and 
  a 
  single 
  

   transverse 
  septum. 
  They 
  grow 
  in 
  dense 
  sori 
  or 
  masses 
  of 
  a 
  rusty- 
  

   brown, 
  blackish-brown 
  or 
  black 
  color. 
  These 
  masses 
  are 
  usually 
  dot- 
  

   like 
  and 
  are 
  scattered 
  uniformly 
  over 
  the 
  leaves 
  or 
  are 
  collected 
  in 
  

   clusters 
  on 
  more 
  or 
  less 
  discolored 
  spots. 
  The 
  earlier 
  forms 
  of 
  the 
  

   species 
  ha^e 
  the 
  spores 
  simple 
  and 
  were 
  formerly 
  grouped 
  in 
  the 
  

   genus 
  Tricho 
  basis. 
  

  

  Puccinia 
  pulchella 
  Pk 
  Ribes 
  prostratum. 
  

  

  P. 
  Prunorum 
  Lk 
  Primus 
  serotina. 
  

  

  ( 
  Anemone 
  nemorosa. 
  

   P. 
  Anemones 
  Pers 
  X 
  Thalictrum 
  dioicum. 
  

  

  ( 
  T. 
  Cornuti. 
  

  

  P 
  solid 
  i 
  Sehw 
  \ 
  Anemone 
  Virginiana. 
  

  

  ( 
  A. 
  Pennsylvania. 
  

  

  P. 
  Calthre 
  Lk 
  Caltha 
  palustris. 
  

  

  P. 
  aculeata 
  Schiu 
  Podophyllum 
  peltatum. 
  

  

  P. 
  Violarum 
  Lk 
  Violet 
  leaves. 
  

  

  P. 
  Lychnidearum 
  Lk 
  Dianthus 
  leaves. 
  

  

  P. 
  Atarias-Wilsoni 
  Clinton 
  Clavtonia 
  Caroliniana. 
  

  

  P. 
  Xoli-tangeris 
  Cd 
  Impatiens 
  fulva. 
  

  

  P. 
  Pyrolas 
  Ck 
  Polygala 
  paucifolia. 
  

  

  P. 
  TTaldsteinife 
  Curt 
  Waldsteinia 
  fragarioides. 
  

  

  P. 
  tripustulata 
  Pk 
  Rubus 
  villosus. 
  

  

  T3 
  -r, 
  t 
  . 
  tj 
  I 
  R. 
  occidentalis. 
  

  

  r. 
  reckiana 
  Ltoive 
  st? 
  ,. 
  

  

  | 
  K. 
  stngosus. 
  

  

  P. 
  curtipes 
  Howe 
  Saxifraga 
  Pennsylvanica. 
  

  

  P. 
  spreta 
  Pk 
  Tiarella 
  cordifolia. 
  

  

  •o 
  r^- 
  -n 
  \ 
  Circaea 
  alpina. 
  

  

  P. 
  Circaeae 
  Pers 
  ] 
  c 
  _ 
  La 
  ' 
  tetiana 
  . 
  

  

  P. 
  bullaria 
  Lk 
  , 
  Sanicle 
  stems. 
  

  

  