﻿320 
  BOTANICAL 
  GAZETTE. 
  [December, 
  

  

  threads 
  or 
  tubules, 
  indicating 
  an 
  evolutionary 
  approach 
  

   toward 
  the 
  genus 
  Siphoptychium. 
  

  

  For 
  these 
  structural 
  reasons, 
  and 
  also 
  bv 
  reason 
  of 
  analo- 
  

   gous 
  development, 
  the 
  genus 
  Siphoptychium, 
  notwithstand- 
  

   ing 
  Its 
  present 
  position 
  in 
  the 
  classification 
  of 
  its 
  author, 
  has 
  

   been 
  treated 
  in 
  this 
  paper 
  as 
  allied 
  to 
  the 
  genus 
  Tubulina. 
  

  

  Philadelphia, 
  

  

  Notes 
  upon 
  Peionosporeae 
  for 
  1890 
  

  

  BYRON 
  D. 
  IIALSTED. 
  

  

  _ 
  The 
  season 
  just 
  closing 
  has 
  been 
  a 
  moderately 
  wet 
  one 
  

   in 
  New 
  Jersey, 
  but 
  the 
  excess 
  of 
  rainfall 
  did 
  not 
  equal 
  that 
  

   of 
  last 
  year. 
  This 
  statement 
  that 
  we 
  have 
  had 
  two 
  succeed- 
  

   J"S 
  ^^^j.ye'-ii-s 
  is 
  an 
  important 
  one 
  in 
  this 
  connection. 
  All 
  of 
  

   the 
  ordinary 
  forms 
  of 
  the 
  order 
  Peronosporece 
  have 
  been 
  

   abundant, 
  and 
  only 
  a 
  word 
  will 
  be 
  said 
  of 
  a 
  few 
  of 
  the 
  lead- 
  

   ing 
  species, 
  as 
  there 
  are 
  a 
  number 
  of 
  new 
  hosts 
  for 
  old 
  forms 
  

   and 
  some 
  species 
  new 
  to 
  America 
  to 
  be 
  herein 
  recorded. 
  

  

  piytopithora 
  infestans 
  D'By., 
  causing 
  the 
  wet 
  rot 
  of 
  the 
  

   vviiite 
  potatoes, 
  has 
  been 
  most 
  strikingly 
  destructive 
  this 
  

   autumn, 
  especially 
  in 
  the 
  southern 
  counties 
  of 
  the 
  state. 
  So 
  

   aDundant 
  has 
  it 
  been 
  that 
  thousands 
  of 
  acres 
  that 
  otherwise 
  

   would 
  have 
  yielded 
  a 
  large 
  crop 
  Mall 
  not 
  be 
  dug 
  at 
  all. 
  

   C51 
  ces 
  of 
  the 
  rotting 
  potatoes 
  placed 
  in 
  moist 
  chambers 
  de- 
  

   veloped 
  the 
  conidiophores 
  and 
  spores 
  in 
  four 
  hours. 
  Tbs 
  

   gives 
  some 
  idea 
  of 
  the 
  rapidity 
  with 
  which 
  this 
  fungus 
  runs 
  

   s 
  course, 
  always 
  a 
  surprise 
  as 
  well 
  as 
  source 
  of 
  dismay 
  to 
  

   the 
  growers. 
  

  

  Phytophthora 
  Phaseoli 
  

  

  for 
  h, 
  ; 
  ^?\^^^" 
  ^n 
  Connecticut, 
  has 
  been 
  frequently 
  looked 
  

   neu 
  r^ 
  """"i 
  ""^'T^^ 
  ^^P«^ 
  ^"y 
  «ort 
  of 
  cultivated 
  bean. 
  Th' 
  

   hs 
  -Z 
  i!' 
  ""^ 
  *^^ 
  ^"^^" 
  genus 
  may 
  as 
  yet 
  be 
  quite 
  locals 
  

  

  pT' 
  Y 
  '^ 
  "-^P^^t^^ 
  ^" 
  «5ght 
  at 
  any 
  time, 
  

   abund.nf^''''^ 
  T^'"'^'' 
  (^- 
  & 
  C.) 
  Ber". 
  & 
  DeT., 
  has 
  bee° 
  

   of 
  c 
  W^ 
  "V. 
  'Y 
  ^'^^Pe- 
  I" 
  one 
  vineyard 
  where 
  hundreds 
  

   search 
  n' 
  i^"'" 
  '"^^"^^ 
  by 
  this 
  mildew, 
  after 
  a 
  long 
  

  

  usual 
  thT! 
  -^^"'^ 
  b^ 
  ^°""d 
  upon 
  the 
  leaves. 
  This 
  is 
  so 
  un- 
  

   be 
  said 
  t.^V 
  '^''rthy 
  of 
  notice. 
  In 
  this 
  connection 
  it 
  m 
  

   leaf 
  sHlt 
  ^Pec^^^ens 
  of 
  succulent 
  galls 
  of 
  the 
  stem 
  an 
  

  

  he 
  pK 
  1 
  ^^'^ 
  sometimes 
  found 
  completely 
  covered 
  vv^ 
  

   indica^eTS'Yfi: 
  '""^'^^ 
  ^^^er 
  parts 
  were 
  entirely 
  free. 
  T^J: 
  

  

  ndicates 
  that 
  the 
  soft 
  gall 
  tissue 
  furnishes 
  better 
  condition^ 
  

  

  