﻿CONTENTS 
  

  

  Howe, 
  Marshall 
  A. 
  Observations 
  on 
  monosporangial 
  discs 
  in 
  the 
  genus 
  

  

  Liagora 
  (plate 
  i) 
  I 
  

  

  Merrialvn. 
  Mabel 
  L. 
  Studies 
  in 
  the 
  conjugation 
  of 
  Spirogyra 
  9 
  

  

  Gleason. 
  Henry 
  Allan. 
  Some 
  applications 
  of 
  the 
  quadrat 
  method 
  21 
  

  

  Rydberg. 
  Per 
  Axel. 
  Notes 
  on 
  Rosaceae 
  — 
  XII 
  45 
  

  

  BoYER, 
  Charles 
  S. 
  Rare 
  species 
  of 
  North 
  American 
  Diatomaceae 
  (plate 
  2) 
  . 
  . 
  67 
  

  

  Miller, 
  Robert 
  B. 
  The 
  wood 
  of 
  Machaerium 
  Whitfordii 
  73 
  

  

  Nichols, 
  George 
  E. 
  The 
  vegetation 
  of 
  Connecticut 
  — 
  ^VI. 
  The 
  plant 
  associa- 
  

   tions 
  of 
  eroding 
  areas 
  along 
  the 
  seacoast 
  89 
  

  

  Schaffner, 
  John 
  H. 
  The 
  diecious 
  nature 
  of 
  buffalo-grass 
  119 
  

  

  + 
  

  

  Graff, 
  Paul 
  W. 
  Unreported 
  ferns 
  from 
  Montana 
  125 
  

  

  Harper, 
  R. 
  A. 
  Inheritance 
  of 
  sugar 
  and 
  starch 
  characters 
  in 
  corn 
  (plates 
  

  

  3-S) 
  

  

  137 
  

  

  McAtee, 
  W. 
  L. 
  Notes 
  on 
  the 
  Jack 
  Pine 
  Plains 
  of 
  Michigan 
  187 
  

  

  Stork, 
  Harvey 
  E. 
  Studies 
  in 
  the 
  genus 
  Taraxacum 
  (plates 
  6, 
  7) 
  199 
  

  

  OsTERHOUT, 
  Geo. 
  E. 
  A 
  new 
  Oreocarya 
  from 
  Colorado 
  211 
  

  

  BERG^LAN. 
  H. 
  F. 
  Internal 
  stomata 
  in 
  ericaceous 
  and 
  other 
  unrelated 
  fruits 
  . 
  . 
  . 
  213 
  

  

  O'Neal, 
  Claude 
  E. 
  Microsporogenesis 
  in 
  Datura 
  Stramonium 
  (plates 
  8, 
  9) 
  . 
  . 
  231 
  

  

  Bro\^'N. 
  Forest 
  B. 
  H. 
  The 
  refraction 
  of 
  light 
  in 
  plant 
  tissues 
  243 
  

  

  MacDougal, 
  D. 
  T. 
  The 
  physical 
  factors 
  in 
  the 
  gro\\^h 
  of 
  the 
  tomato 
  261 
  

  

  Haynes, 
  Caroline 
  C. 
  Illustrations 
  of 
  six 
  species 
  of 
  Riccia, 
  with 
  the 
  original 
  

  

  descriptions 
  (plates 
  10-13) 
  279 
  

  

  Harper, 
  Roland 
  M. 
  A 
  week 
  in 
  eastern 
  Texas 
  28.9 
  

  

  Farr, 
  Wanda 
  Kirkbride, 
  Cell-division 
  of 
  the 
  pollen-mother-cell 
  of 
  Cobaea 
  

  

  scandens 
  alba 
  (plate 
  14) 
  325 
  

  

  Brown, 
  Elizabeth 
  Dorothy 
  Wuist. 
  Apogamy 
  in 
  Osmunda 
  cinnamomea 
  and 
  

  

  O. 
  Claytoniana 
  "^ 
  339 
  

  

  Rickett. 
  H. 
  W. 
  Regeneration 
  in 
  Sphaerocarpos 
  Donnellii 
  347 
  

  

  Weather 
  WAX, 
  Paul. 
  A 
  misconception 
  as 
  to 
  the 
  structure 
  of 
  the 
  ear 
  of 
  maize. 
  . 
  359 
  

  

  Williams, 
  R. 
  S. 
  Calymperaceae 
  of 
  North 
  America 
  (plates 
  15-17) 
  .......'.- 
  3*^7 
  

  

  Berry, 
  Edward 
  W. 
  Contributions 
  to 
  the 
  Mezozoic 
  flora 
  of 
  the 
  Atlantic 
  coastal 
  

  

  plain, 
  XIII.— 
  North 
  Carolina 
  397 
  

  

  BRO^^^sr, 
  Forest 
  B. 
  H. 
  The 
  silicious 
  skeleton 
  of 
  tracheids 
  and 
  fibers 
  407 
  

  

  Rusk, 
  Hester 
  M. 
  The 
  effect 
  of 
  zinc 
  sulphate 
  on 
  protoplasmic 
  streaming 
  .... 
  425 
  

   Rydberg, 
  p. 
  a. 
  Phytogeographical 
  notes 
  on 
  the 
  Rocky 
  Mountain 
  region 
  — 
  IX. 
  

  

  1 
  

  

  Wooded 
  formations 
  of 
  the 
  Montane 
  Zone 
  of 
  the 
  Southern 
  Rockies 
  441 
  

  

  Carey, 
  Cornelia 
  Lee. 
  A 
  method 
  of 
  preparation 
  and 
  some 
  properties 
  of 
  a 
  

  

  starch 
  gel 
  45S 
  

  

  Arthur, 
  Joseph 
  Charles. 
  New 
  si>ecies 
  of 
  Uredineae 
  — 
  XII. 
  465 
  

  

  Smith, 
  Charles 
  Piper. 
  Studies 
  in 
  the 
  genus 
  Lupinus 
  — 
  V. 
  The 
  Sparsiflori. 
  ." 
  487 
  

   Nichols, 
  George 
  E, 
  The 
  vegetation 
  of 
  Connecticut 
  — 
  ^VII. 
  The 
  associations 
  

  

  of 
  depositing 
  areas 
  along 
  the 
  seacoast 
  511 
  

  

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