﻿28o 
  

  

  BOTANICAL 
  GAZETTE. 
  

  

  ) 
  

  

  [October 
  

  

  in 
  this 
  journal 
  (xiv. 
  p. 
  272). 
  A 
  further 
  contribution 
  to 
  the 
  same 
  subject 
  

   by 
  Bokorny 
  will 
  be 
  found 
  in 
  Pringsheim's 
  Jahrbilcher 
  xxi. 
  469. 
  Here 
  the 
  

   author 
  discussea 
  the 
  relative 
  conducting 
  capacity 
  of 
  different 
  tissues, 
  the 
  

   vai-ialion 
  m 
  this 
  capacity 
  induced 
  by 
  the 
  action 
  of 
  various 
  substances, 
  the 
  

   relation 
  of 
  the 
  walls 
  of 
  vessels 
  to 
  conduction 
  and 
  the 
  use 
  of 
  coloring 
  

   matters 
  for 
  studying 
  the 
  transpiration 
  stream. 
  

  

  The 
  Bulletin 
  of 
  the 
  Torrey 
  Botanical 
  Club 
  for 
  August 
  contains 
  "a 
  

   descriptive 
  hst 
  of 
  the 
  genus 
  Heuchera," 
  by 
  Wm. 
  E. 
  Wheelock, 
  in 
  which 
  

   21 
  species 
  are 
  enumerated, 
  H. 
  Nova-Mexicana 
  being 
  anew 
  one; 
  a 
  bio- 
  

   graphical 
  sketch 
  of 
  Dr. 
  Geo. 
  Thurber, 
  by 
  H. 
  H. 
  Rusby 
  ; 
  another 
  install- 
  

   ment 
  of 
  Dr. 
  Rusby's 
  South 
  American 
  plants, 
  containing 
  descriptions 
  of 
  

   anew 
  species 
  and 
  completing 
  the 
  enumeration 
  through 
  Saniydacese 
  ; 
  a 
  

   new 
  Gheilanthes 
  from 
  Lower 
  California, 
  by 
  D. 
  C. 
  Eaton, 
  named 
  C. 
  Bran- 
  

   aegei; 
  and 
  a 
  new 
  fern 
  for 
  N. 
  Am., 
  Asplenium 
  fontanum 
  Bernh. 
  {A. 
  Hdm 
  

   Ohio 
  '"^^^^''^^ 
  ^^ 
  Professor 
  T. 
  C. 
  Porter 
  from 
  both 
  Pennsylvania 
  and 
  

  

  Dr. 
  Alfred 
  Fischer 
  has 
  in 
  the 
  last 
  part 
  of 
  Pringsheim's 
  Jahrhilekr 
  

   a 
  long 
  paper 
  on 
  certain 
  points 
  in 
  the 
  physiology 
  of 
  woody 
  plants. 
  We 
  

   translate 
  a 
  part 
  of 
  his 
  summary 
  of 
  results 
  as 
  being 
  of 
  unusual 
  interest: 
  

   fi,o 
  . 
  .^"™^er 
  there 
  may 
  be 
  obtained 
  in 
  the 
  vessels 
  of 
  fifty 
  per 
  centol 
  

   ?fli^^ 
  ^^l^*"^^^ 
  examined 
  and 
  in 
  the 
  tracheides 
  of 
  the 
  observed 
  Con- 
  

   nnif 
  o^r!?i''^ 
  ^,*^™S 
  glucose 
  reaction. 
  The 
  other 
  fifty 
  per 
  cent, 
  contain 
  

   ?s 
  iLpl'! 
  ' 
  ^^'i'°?^- 
  , 
  ^"Slans 
  and 
  Fraxinus 
  contain 
  none. 
  The 
  gjuc* 
  

   wo^fn 
  fiKo^ 
  '''iVl'' 
  *^,'^ 
  ^^««e^S' 
  none 
  or 
  a 
  very 
  little 
  being 
  found 
  in 
  tb 
  

   Sr 
  T. 
  Undershrubs 
  and 
  herbs 
  contain 
  no 
  glucose 
  in 
  the 
  vessels 
  o 
  

   nlSLpvT'' 
  •'''??' 
  5^^'.^^^^' 
  0^ 
  veins. 
  It 
  does 
  not 
  occur 
  in 
  the 
  two 
  latt« 
  

   fhe 
  Hnnn!^ 
  '" 
  ^^' 
  deciduous 
  trees. 
  In 
  winter 
  the 
  amount 
  of 
  glucose- 
  

   salrP^?. 
  ^^°T 
  """^^ 
  r^'^^ms 
  small; 
  in 
  the 
  glucose-rich 
  woods 
  the 
  

   ncrfa«e 
  n 
  n' 
  ^''' 
  diminution 
  in 
  the 
  amount 
  pFesent. 
  In 
  spring 
  agr 
  

   t^S 
  hlnn^^- 
  ^"'°1'^^°^ 
  glucose 
  in 
  the 
  vessels 
  takes 
  place 
  during 
  J 
  

   Kfnnini 
  nfT 
  ^' 
  ^u^^^^ 
  ^^ 
  ^o'lowed 
  by 
  a 
  further 
  increase 
  when 
  at 
  h 
  

   titf 
  ?eaZ-> 
  ^^ 
  ^' 
  '"'^"^ 
  '*^'"^ 
  is 
  dissolved 
  ; 
  at 
  this 
  time 
  the 
  qu^ 
  

   durinSp 
  « 
  ' 
  "maximum. 
  There 
  is 
  no 
  further 
  increase 
  of 
  the 
  ?luc^ 
  

  

  soSn 
  of 
  Sf 
  """'■' 
  ^'"l 
  ^ 
  '^'^^^ 
  ^^""'^^^ 
  ^^o'^^^d 
  the 
  end 
  of 
  the 
  time 
  of 
  

   Bomtion 
  of 
  the 
  reserve 
  food. 
  ,,^ 
  

  

  during 
  the 
  'n. 
  '•'^i^^^body 
  of 
  a 
  tree 
  undergoes 
  numerous 
  changes, 
  mo^ 
  ' 
  

   tSmlt-I"'^- 
  1 
  vegetative 
  rest. 
  Eight 
  phases 
  may 
  be 
  noted.* 
  

   •embe 
  a 
  sS 
  '''>•'' 
  "^'^^°' 
  ^°"o^«^ 
  by 
  a 
  solution 
  of 
  ^^^rfynj^ 
  

   a 
  rreneratinn^ 
  minimum 
  during 
  December, 
  January 
  and 
  February 
  

   in 
  sSl 
  a^^^^^^^^^ 
  in 
  early 
  spring, 
  resultiAg 
  in 
  a 
  starch 
  maximu^ 
  

  

  a 
  minimum 
  tow 
  ?f 
  1 
  ^^^^"^ 
  ^^out 
  the 
  beginning 
  of 
  May. 
  followed 
  b 
  

   starch 
  thro^lTif:^' 
  *^^ 
  «"d 
  of 
  May 
  ; 
  and 
  finally, 
  an 
  accumulat 
  on 
  ^ 
  

   of 
  the 
  wood 
  .n? 
  •t'^^'^er. 
  In 
  the 
  hard 
  wood 
  trees 
  the 
  reserve 
  star 
  

   the 
  sLch 
  in 
  thP 
  T\ 
  'r^^^^ 
  unchanged 
  throughout 
  the. 
  winter, 
  J^ 
  

   Inthrsoftwood 
  t.l'^>'l"f.di««o^ved\nd 
  appearing 
  again 
  m 
  « 
  

  

  and 
  spring 
  St 
  llffh'^f^^'^^S 
  '^^ 
  Conifersfthe 
  alterations 
  in 
  ^ge 
  

   of 
  the 
  winter 
  ^inf 
  ^^ 
  l^'^"^^ 
  ^n 
  the 
  pith, 
  wood 
  and 
  bark. 
  At 
  the 
  u 
  

   sectionrwillfo^mT°l^'"\"^^^«'P'«^^« 
  of 
  bark 
  and 
  even 
  micr^joj^^ 
  

   quicker 
  SV:iu'^_' 
  F«h 
  m 
  the 
  cells 
  in 
  a 
  short 
  time, 
  the 
  more 
  anj 
  j 
  

  

  snicker 
  the 
  higher 
  h. 
  % 
  *^^ 
  ''^"^ 
  

   in 
  forty-eiffht 
  ?n 
  ^^e 
  temperature, 
  

   which 
  i&^?°'^'-«- 
  The 
  material 
  

  

  I^^a^^i™.^ 
  

  

  ;ime, 
  ine 
  ^.V^r 
  f 
  rmed 
  

  

  C. 
  starch 
  will 
  be 
  for-J^ 
  

  

  Even 
  at 
  5° 
  , 
  

  

  . 
  material 
  from 
  which 
  it 
  is 
  formed 
  . 
  

   as 
  well 
  as 
  theTninf?"''^^,^? 
  ^^e 
  cells. 
  This 
  starch 
  regeneration 
  m 
  JF 
  ^ 
  

   temperature 
  bufi 
  ?^ 
  '* 
  ^ 
  ^^^ 
  '^'^t^nin, 
  is 
  not 
  entirely 
  dependent 
  jj,e 
  

   protoplasm 
  ' 
  determined 
  also 
  by 
  aA 
  inherited 
  periodicity 
  oi 
  

  

  

  