﻿30 
  TWENTY- 
  NINTH 
  REPORT 
  ON 
  THE 
  STATE 
  MUSEUM. 
  

  

  certain 
  to 
  answer 
  to 
  the 
  description 
  of 
  Puccinia 
  jporphyrogenita, 
  and 
  

   an 
  JEcidium 
  on 
  the 
  leaves 
  of 
  the 
  barberry, 
  Berberis 
  vulgaris^ 
  will 
  

   scarcely 
  be 
  any 
  other 
  than 
  JEcidium 
  Berberidis. 
  

  

  A 
  fact 
  of 
  still 
  greater 
  moment 
  is, 
  that 
  some 
  of 
  our 
  cultivated 
  plants 
  

   are 
  attacked 
  by 
  fungoid 
  foes 
  which, 
  minute 
  as 
  they 
  are, 
  materially 
  

   diminish 
  their 
  vigor, 
  impair 
  their 
  useful 
  products 
  and, 
  in 
  some 
  

   instances, 
  even 
  destroy 
  their 
  vitality. 
  Raspberries 
  are 
  attacked 
  by 
  

   the 
  American 
  raspberry 
  rust, 
  Uredo 
  luminata 
  ; 
  pea 
  vines, 
  by 
  the 
  

   pea 
  mildew, 
  Erysijjhe 
  Martii 
  * 
  oats 
  and 
  wheat, 
  by 
  the 
  grain 
  smut, 
  

   Ustilago 
  Carlo 
  ; 
  plum 
  and 
  cherry 
  trees, 
  by. 
  the 
  black-knot, 
  Sjohceria 
  

   morbosa, 
  and 
  lettuce 
  and 
  onions 
  by 
  their 
  respective 
  molds, 
  Peronos- 
  

   pora 
  gangliformis 
  and 
  Peronospora 
  Schleideniana. 
  Such 
  fungi 
  

   must 
  be 
  regarded 
  as 
  injurious 
  to 
  the 
  interests 
  of 
  the 
  husbandman, 
  

   nor 
  is 
  the 
  pecuniary 
  loss 
  which 
  they 
  occasion 
  trivial 
  or 
  inconsiderable. 
  

   The 
  loss 
  produced 
  by 
  the 
  potato 
  mold 
  alone, 
  Peronotpora 
  infestans, 
  

   abundantly 
  warrants 
  all 
  the 
  effort 
  and 
  labor 
  and 
  study 
  that 
  have 
  been 
  

   devoted 
  to 
  the 
  investigation 
  of 
  the 
  history 
  of 
  the 
  fungus 
  and 
  to 
  the 
  

   discovery 
  of 
  some 
  efficient 
  means 
  for 
  preventing 
  its 
  attacks 
  or 
  over- 
  

   coming 
  their 
  destructive 
  consequences. 
  

  

  On 
  the 
  other 
  hand 
  those 
  fungi 
  that 
  infest 
  noxious 
  weeds 
  and 
  hin- 
  

   der 
  their 
  dissemination 
  and 
  multiplication, 
  must 
  be 
  regarded 
  as 
  the 
  

   friends 
  and 
  allies 
  of 
  man. 
  Thus 
  the 
  thistle 
  rust, 
  Trichobasis 
  suaveo- 
  

   lens, 
  an 
  early 
  state 
  of 
  Puccinia 
  Compositarum, 
  sometimes 
  attacks 
  

   the 
  Canada 
  thistle 
  with 
  great 
  virulence, 
  and 
  so 
  impairs 
  its 
  vigor 
  as 
  to 
  

   prevent 
  the 
  development 
  of 
  the 
  seeds, 
  thereby 
  checking 
  the 
  propaga- 
  

   tion 
  and 
  spread 
  of 
  this 
  pestilent 
  plant. 
  So, 
  also, 
  the 
  troublesome 
  

   bur-grass, 
  Cenchrus 
  tribuloides, 
  is 
  sometimes 
  infested 
  by 
  a 
  smut 
  

   fungus, 
  Ustilago 
  Syntherismoe* 
  which 
  not 
  only 
  prevents 
  the 
  develop- 
  

   ment 
  of 
  the 
  seeds 
  of 
  the 
  grass 
  but 
  also 
  of 
  the 
  annoying 
  bur-like 
  

   involucres. 
  It 
  may 
  yet 
  be 
  found 
  practicable 
  to 
  keep 
  down 
  this 
  grass 
  

   by 
  the 
  artificial 
  dissemination 
  of 
  the 
  spores 
  of 
  its 
  parasitic 
  fungus 
  in 
  

   those 
  light, 
  sandy 
  soils 
  where 
  the 
  grass 
  usually 
  abounds. 
  It 
  certainly 
  

   is 
  desirable 
  that 
  the 
  life 
  histories 
  of 
  these 
  fungoid 
  friends 
  and 
  foes 
  

   should 
  be 
  better 
  understood 
  than 
  they 
  now 
  are, 
  and 
  that 
  the 
  means 
  

   of 
  multiplying 
  or 
  diminishing 
  their 
  numbers 
  according 
  to 
  their 
  char- 
  

   acter 
  should 
  be 
  under 
  the 
  control 
  of 
  the 
  farmer. 
  

  

  With 
  these 
  thoughts 
  in 
  mind 
  it 
  lias 
  seemed 
  advisable 
  to 
  group 
  

   together 
  the 
  names 
  of 
  the 
  parasitic 
  fungi 
  hitherto 
  found 
  in 
  the 
  State, 
  

   with 
  their 
  supporting 
  plants. 
  The 
  list 
  of 
  these 
  is 
  marked 
  (6). 
  

  

  