﻿1890.] 
  BOTANICAL 
  GAZETTE. 
  27 
  1 
  

  

  areas 
  commonly 
  accepted 
  by 
  naturalists, 
  viz. 
  : 
  the 
  Eastern, 
  Central, 
  and 
  

   Western 
  Provinces 
  ; 
  (3) 
  The 
  recognition 
  of 
  seven 
  minor 
  life 
  zones 
  in 
  the 
  

   San 
  Francisco 
  Mountain 
  region, 
  four 
  of 
  boreal 
  origin, 
  and 
  three 
  of 
  sub- 
  

   tropical 
  or 
  mixed 
  origin 
  ; 
  (4) 
  The 
  correlation 
  of 
  the 
  four 
  boreal 
  zones 
  

   with 
  corresponding 
  zones 
  in 
  the 
  north 
  and 
  east. 
  Colored 
  maps 
  are 
  used 
  

   to 
  indicate 
  distribution, 
  and 
  the 
  one 
  of 
  most 
  general 
  interest 
  is 
  a 
  provis- 
  

   ional 
  biological 
  map 
  of 
  North 
  America. 
  

  

  liVatson's 
  Contritoutlons. 
  

  

  In 
  looking 
  over 
  the 
  bulky 
  contributions 
  to 
  American 
  botany 
  which 
  

   issue 
  every 
  year 
  from 
  Cambridge 
  and 
  other 
  botanical 
  centers 
  in 
  this 
  

   country, 
  it 
  seems 
  that, 
  " 
  of 
  making 
  species 
  there 
  is 
  no 
  end." 
  But 
  so 
  long 
  

   as 
  new 
  species 
  are 
  found 
  they 
  must 
  be 
  described, 
  and 
  the 
  fascmation 
  

   which 
  attends 
  their 
  discovery 
  will 
  always 
  push 
  this 
  kind 
  of 
  work 
  in 
  a 
  

   most 
  unflagging 
  way. 
  The 
  " 
  Contribution 
  " 
  before 
  us 
  is 
  Dr. 
  Watson's 
  17th 
  

   in 
  this 
  form, 
  appearing 
  in 
  Proc. 
  Am. 
  Acad, 
  xxv.pp. 
  123-163, 
  and 
  is 
  about 
  

   M 
  "solid 
  botany 
  " 
  as 
  it 
  could 
  be 
  made, 
  nothing 
  of 
  the 
  list 
  character 
  ap- 
  

   pearing. 
  The 
  first 
  part 
  consists 
  of 
  miscellaneous 
  notes, 
  many 
  of 
  them 
  

   being 
  the 
  formal 
  presentation 
  of 
  the 
  reasons 
  for 
  adopting 
  certain 
  changes 
  

   in 
  the 
  new 
  edition 
  of 
  Gray's 
  Manual. 
  As 
  these 
  changes 
  are 
  already 
  mdi- 
  

   cated 
  in 
  the 
  Manual, 
  it 
  is 
  not 
  necessary 
  to 
  recount 
  them 
  here. 
  The 
  rec- 
  

   ognition 
  of 
  4 
  new 
  species 
  of 
  Streptanthus 
  gives 
  occasion 
  for 
  a 
  synoptical 
  

   tey 
  to 
  all 
  the 
  species, 
  numbering 
  now 
  22. 
  One 
  of 
  the 
  notable 
  things 
  is 
  

   the 
  establishment 
  of 
  the 
  genus 
  Eriogynia, 
  occasioned 
  by 
  the 
  discovery 
  

   a 
  very 
  peculiar 
  Montana 
  species, 
  which 
  also 
  takes 
  with 
  it 
  two 
  species 
  

   heretofore 
  placed 
  under 
  Spiraea, 
  as 
  fully 
  presented 
  and 
  illustrated 
  in 
  tne 
  

   present 
  number 
  of 
  this 
  journal. 
  , 
  ht 
  • 
  n 
  

  

  The 
  second 
  part 
  is 
  chiefly 
  concerned 
  with 
  Mr. 
  Pringle 
  s 
  Mexican 
  

   collections 
  of 
  1888 
  and 
  1889, 
  which, 
  as 
  usual, 
  abound 
  in 
  new 
  species. 
  An 
  

   enumeration 
  of 
  these 
  88 
  new 
  species, 
  or 
  any 
  part 
  of 
  them, 
  is 
  i"^P°f 
  '° 
  

   in 
  our 
  limited 
  space, 
  but 
  the 
  new 
  genera 
  are 
  important 
  enough 
  to 
  u 
  

   specially 
  mentioned. 
  Sargentia 
  is 
  a 
  new 
  genus 
  of 
  Rvia^se, 
  a 
  tree, 
  a^u 
  

   fitly 
  commemorates 
  Professor 
  C. 
  S. 
  Sargent. 
  Rhodosdadium, 
  a 
  new 
  g 
  

   nus 
  of 
  Peucedanoid 
  Umhelliferse, 
  has 
  double 
  signification 
  in 
  the 
  coior 
  

   "8 
  flowers 
  and 
  the 
  name 
  of 
  Mr. 
  J. 
  N. 
  Rose, 
  whose 
  long 
  ^^"^'f^ZZ- 
  

   the 
  writer 
  in 
  the 
  study 
  of 
  N. 
  Am. 
  Umbelliferas 
  this 
  genus 
  deservecj 
  

   commemorates. 
  Jaliseoa 
  is 
  the 
  third 
  new 
  genus, 
  belonging 
  to 
  tDe 
  £, 
  j^ 
  

   diocese. 
  

  

  The 
  " 
  nerves 
  " 
  of 
  the 
  sensitive 
  plant.i 
  

  

  In 
  this 
  pamphlet 
  Dr. 
  G. 
  Haberlandt 
  describes 
  what 
  has 
  been 
  a 
  mt 
  - 
  

   «rto 
  unobserved 
  system 
  of 
  tissues, 
  to 
  which 
  he 
  gives 
  ^be 
  "^^'''^.^^^^^ 
  

   name 
  of 
  " 
  reizleitende 
  Gewebesystem," 
  by 
  means 
  of 
  which 
  the 
  /^^P"^^ 
  

   «!i^^pbya^timulu^^^^ 
  

  

  'Haberlandt, 
  G. 
  -Das 
  reizleitende 
  Gewebesystem 
  der 
  Sinnpflanze. 
  8vo. 
  PP. 
  87. 
  P 
  ■ 
  ■ 
  

   ^P"g: 
  WilhelmEnglemann. 
  1890. 
  Mk. 
  4. 
  

  

  