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  i^gO.] 
  BOTANICAL 
  GAZETTE 
  

  

  259 
  

  

  nor 
  does 
  he 
  mention 
  an}^ 
  control 
  plants 
  used 
  in 
  the 
  experi- 
  

   ment. 
  

  

  If 
  it 
  is 
  true, 
  as 
  the 
  experiments 
  here 
  recorded 
  would 
  seem 
  

   to 
  indicate, 
  that 
  the 
  ascospores 
  are 
  the 
  main 
  source 
  of 
  infec- 
  

   tion, 
  and 
  that 
  the 
  spores 
  from 
  the 
  Phyllosticta 
  forms 
  on 
  the 
  

   leaves 
  of 
  Vitis 
  and 
  Ampelopsis 
  will 
  not 
  grow 
  on 
  grape 
  fruit, 
  

   the 
  matter 
  is 
  one 
  of 
  considerable 
  practical 
  importance. 
  This 
  

   part 
  of 
  the 
  subject, 
  however, 
  we 
  shall 
  not 
  touch 
  upon 
  here, 
  

   our 
  purpose 
  being 
  merely 
  to 
  record 
  the 
  facts, 
  leaving 
  the 
  

   practical 
  questions 
  involved 
  to 
  be 
  settled 
  by 
  field 
  experi- 
  

   ments, 
  which 
  we 
  maj^ 
  add 
  are 
  now 
  under 
  way. 
  

  

  Defariment 
  0/ 
  Agriculiure, 
  Washington, 
  D. 
  C. 
  

  

  Notes 
  on 
  North 
  American 
  rmbelliferae. 
  II 
  

  

  JOHN 
  M. 
  COULTER 
  AND 
  J. 
  N. 
  ROSE. 
  

  

  (with 
  plate 
  XV.) 
  

  

  a 
  1 
  

  

  f 
  XT 
  ^' 
  ^* 
  paper 
  of 
  this 
  series 
  was 
  published 
  in 
  this 
  journal 
  

   ot 
  November, 
  1889. 
  The 
  present 
  paper 
  consists 
  chiefly 
  of 
  

   ^ 
  '"eport 
  on 
  Mr. 
  J. 
  Donnell 
  Smith's 
  Guatemalan 
  collection. 
  

  

  Hydrocotyle 
  leucocephala 
  Cham. 
  & 
  Schl. 
  No. 
  1776 
  

   01 
  bmith 
  from 
  Coban 
  Department, 
  Alta 
  Vera 
  Paz, 
  alt. 
  4,300 
  

  

  eet 
  April 
  1889 
  ; 
  also 
  74 
  of 
  Tiirckheim 
  from 
  near 
  the 
  same 
  

   ^ocahty, 
  May 
  1879. 
  Although 
  Mr. 
  Hemsley 
  says 
  that 
  he 
  has 
  

   jound 
  no 
  publication 
  of 
  this 
  species 
  from 
  Mexico, 
  these 
  spec- 
  

  

  "iens 
  seem 
  to 
  accord 
  very 
  well 
  with 
  the 
  description. 
  

  

  Hydrocotyle 
  Bonariensis 
  Lam., 
  var. 
  Texana 
  n. 
  var. 
  

  

  etioles 
  and 
  peduncles 
  15 
  to 
  20 
  cm. 
  long; 
  leaves 
  orbicular- 
  

   Peuate, 
  not 
  notched 
  at 
  base, 
  12 
  to 
  15-nerved: 
  inflorescence 
  

   5 
  to 
  10 
  cm. 
  long, 
  irregularly 
  or 
  3 
  to 
  5-umbellately 
  branched 
  : 
  

   pedicels 
  3 
  mm. 
  long 
  or 
  less 
  : 
  fruit 
  obtuse 
  at 
  base, 
  2 
  mm. 
  long 
  

   cnli^ 
  mm. 
  broad.— 
  Texas, 
  1888, 
  G. 
  C. 
  Nealley. 
  Probably 
  

  

  ^ 
  ected 
  along 
  the 
  sea-coast, 
  as, 
  otherwise, 
  its 
  occurrence 
  

  

  "mn 
  our 
  borders 
  would 
  be 
  hard 
  to 
  explain. 
  The 
  species 
  is 
  

   ly 
  known 
  from 
  southern 
  Mexico 
  and 
  South 
  America. 
  

   ti^„ 
  y^^RocoTYLE 
  prolifera 
  Kcll. 
  This 
  species 
  is 
  men- 
  

  

  "ned 
  by 
  Hemsley 
  in 
  Suppl. 
  Biol. 
  Cent. 
  Amer., 
  and 
  to 
  it 
  

  

  II- 
  referred 
  Coulter's, 
  and 
  Parry 
  & 
  Palmer's 
  specimens, 
  

  

  iich 
  m 
  the 
  body 
  of 
  the 
  work 
  are 
  placed 
  under 
  H. 
  interrupta. 
  

  

  ^'th 
  collected 
  it 
  in 
  Laguna 
  Amatillan, 
  Dept. 
  Amatillan, 
  

  

  