﻿p.. 
  

  

  189O.J 
  BOTANICAL 
  GAZETTE. 
  211 
  

  

  tions 
  may 
  yet 
  make 
  this 
  a 
  distinct 
  species. 
  The 
  variety 
  is 
  far 
  less 
  abun- 
  

   dant, 
  in 
  this 
  vicinity, 
  than 
  the 
  true 
  species. 
  

  

  I 
  have 
  cultivated, 
  for 
  a 
  number 
  of 
  years, 
  a 
  bed 
  of 
  Melilotus 
  offici- 
  

   nalis, 
  and 
  another 
  of 
  Datura 
  meteloides. 
  During 
  all 
  these 
  years 
  they 
  

   behaved 
  as 
  annual^, 
  but 
  this 
  spring 
  they 
  came 
  up 
  in 
  abundance 
  from 
  

   last 
  year's 
  roots, 
  and 
  also 
  from 
  the 
  scattered 
  seeds. 
  

  

  I 
  have 
  been 
  much 
  interested 
  in 
  noting 
  the 
  progress 
  Phoradendron 
  

  

  flavescens 
  has 
  made 
  during 
  the 
  past 
  two 
  mild 
  winters. 
  It 
  is 
  found 
  in 
  

  

  much 
  greater 
  abundance 
  and 
  in 
  larger 
  bunches 
  than 
  I 
  have 
  yet 
  seen 
  it 
  

  

  in 
  this 
  vicinty. 
  A 
  few 
  more 
  mild 
  w^inters 
  and 
  it 
  would 
  extend 
  its 
  range 
  

  

  northward 
  several 
  hundred 
  miles. 
  During 
  the 
  past 
  twenty 
  years, 
  on 
  

  

  several 
  occasions, 
  it 
  has 
  been 
  almost 
  entirely 
  exterminated 
  by 
  cold 
  win- 
  

   ters. 
  

  

  In 
  addition 
  to 
  the 
  hosts 
  given 
  (Botanical 
  Gazette 
  ix. 
  102), 
  for 
  this 
  

   locality, 
  I 
  can 
  now 
  add 
  Prunus 
  serotina.— 
  Jacob 
  Schneck, 
  ML 
  Carmeh 
  

   Illinois. 
  

  

  A 
  new 
  Hellauthemiim.— 
  Mrs. 
  S. 
  B. 
  Walker, 
  of 
  Castle 
  Rock, 
  Colorado, 
  

   has 
  for 
  two 
  successive 
  seasons 
  sent 
  specimens 
  of 
  a 
  Helianthemum 
  which 
  

   ought 
  to 
  be 
  characterized 
  as 
  a 
  good 
  variety 
  of 
  H. 
  Canadense, 
  as 
  follows 
  : 
  

  

  S, 
  Canadense, 
  van 
  IValkerie. 
  Leaves 
  narrowly 
  obovate 
  to 
  linear- 
  

   oblong, 
  12 
  to 
  36 
  mm. 
  long: 
  petal-bearing 
  flowers 
  1 
  to 
  5, 
  on 
  pedicels 
  6 
  to 
  

   ^mm. 
  long: 
  petals 
  obovate, 
  obcordate 
  or 
  cuneate, 
  6 
  to 
  8 
  mm. 
  long, 
  

   bright 
  yellow, 
  varying 
  to 
  paler: 
  secondary 
  flowers 
  apparently 
  wanting: 
  

   capsule 
  4 
  to 
  6 
  mm. 
  long.—Douglas 
  County, 
  Colorado, 
  1889 
  and 
  1890. 
  Mrs, 
  

  

  S^ 
  fi. 
  Walker. 
  

  

  The 
  resemblance 
  to 
  H. 
  Canadense 
  is 
  quite 
  well 
  marked, 
  but 
  that 
  

   species 
  is 
  not 
  given 
  as 
  occurring 
  west 
  of 
  Minnesota, 
  while 
  our 
  variety 
  

   occurs 
  in 
  a 
  region 
  hitherto 
  said 
  to 
  be 
  without 
  a 
  representative 
  of 
  the 
  

   genus. 
  The 
  specimens 
  are 
  excellent, 
  and 
  collected 
  at 
  various 
  times, 
  yet 
  

   none 
  of 
  them 
  show 
  any 
  secondary 
  flowers 
  so 
  characteristic 
  of 
  the 
  species, 
  

   f^nis 
  character 
  together 
  with 
  the 
  leaves 
  and 
  more 
  numerous 
  petal-bear- 
  

   ing 
  flowers, 
  make 
  a 
  sufficiently 
  marked 
  varietv.— 
  Walter 
  H. 
  Evans, 
  

   Oraufoi'davUle, 
  Ind. 
  

  

  . 
  Penicillium 
  and 
  corrosive 
  snbliiiiate,— 
  Dr. 
  Coulter, 
  on 
  the 
  above 
  topic, 
  

  

  jn 
  the 
  March 
  number 
  of 
  the 
  Gazette, 
  relates 
  an 
  experience 
  that 
  is 
  simi- 
  

  

  ar 
  to 
  one 
  we 
  have 
  had 
  with 
  our 
  glue 
  bottles 
  in 
  the 
  laboratory. 
  By 
  pro- 
  

  

  r^cted 
  sterilization 
  of 
  bottle 
  and 
  addition 
  of 
  a 
  considerable 
  quantity 
  of 
  

  

  a 
  saturated 
  solution 
  of 
  mercuric 
  chloride, 
  the 
  growth 
  of 
  the 
  fungus 
  was 
  

  

  « 
  opped. 
  ^ 
  As 
  neither 
  of 
  these 
  results 
  were 
  determined 
  quantitatively, 
  

  

  ^ 
  ^'^periment 
  was 
  tried 
  with 
  percentage 
  solutions, 
  to 
  see 
  how 
  much 
  

  

  ^ 
  ercuric 
  chloride 
  was 
  necessary 
  to 
  stop 
  the 
  growth 
  of 
  the 
  fungus. 
  10 
  

  

  j^c, 
  tubes 
  of 
  gelatine, 
  to 
  which 
  were 
  added 
  1, 
  2 
  and 
  3 
  c. 
  c. 
  of 
  a 
  solution 
  

  

  jj 
  ^^^^curic 
  chloride 
  (1:1000) 
  were 
  copiously 
  inoculated 
  with 
  Penicil- 
  

  

  ^"^ 
  glaucum 
  and 
  then 
  plated 
  out 
  according 
  to 
  the 
  usual 
  bacteriological 
  

  

  