﻿Index 
  to 
  American 
  botanical 
  literature 
  553 
  

  

  O'Neal, 
  C. 
  E. 
  Microsporogenesis 
  in 
  Datura 
  Stramonium. 
  Bull. 
  

  

  Torrey 
  Club 
  47: 
  231-241. 
  pL 
  8-Q. 
  23 
  Je 
  1920. 
  

   Pascher, 
  A. 
  Eine 
  Bemerkung 
  liber 
  die 
  Zusammensetzung 
  des 
  Phyto- 
  

  

  planktons 
  des 
  Meeres, 
  Biol. 
  Zentralbl. 
  37: 
  312-315. 
  30 
  Je 
  1920. 
  

  

  Peltier, 
  G. 
  L., 
  & 
  Frederich, 
  W. 
  J. 
  Relative 
  susceptibility 
  to 
  Citrus- 
  

   cankers 
  of 
  different 
  species 
  and 
  hybrids 
  of 
  the 
  genus 
  Citrus, 
  including 
  

   the 
  wild 
  relatives. 
  Jour. 
  Agr. 
  Research 
  19: 
  339-362. 
  pL 
  57-68. 
  

   . 
  15 
  JI 
  1920. 
  

  

  Pilger, 
  R» 
  .Die 
  Taxales. 
  MitteiL 
  Deutsch. 
  Dendr. 
  Ges. 
  23: 
  1-30. 
  

   pL 
  i-io. 
  1916. 
  

  

  Purdy, 
  C. 
  Pacific 
  Coast 
  lilies 
  and 
  their 
  . 
  culture. 
  Jour. 
  Internat. 
  

   Card. 
  Club 
  3: 
  497-532. 
  1920. 
  [Illust.] 
  

  

  Reed, 
  G. 
  M., 
  & 
  Duncan, 
  G. 
  H. 
  Flag 
  smut 
  and 
  take-all. 
  Univ. 
  

   Illinois 
  Agr. 
  Exp. 
  Sta. 
  Circ. 
  242: 
  1-4./. 
  /. 
  Jl 
  1920. 
  

  

  Rehder, 
  A. 
  New 
  species, 
  varieties 
  and 
  combinations 
  from 
  the 
  her- 
  

   barium 
  and 
  the 
  collections 
  of 
  the 
  Arnold 
  Arboretum 
  (con,) 
  Jour. 
  

   Arnold 
  Arb. 
  i; 
  121-146. 
  20 
  N 
  1919; 
  i: 
  191-210, 
  23 
  F 
  1920; 
  i: 
  

   254-263. 
  5 
  My 
  1920. 
  

  

  Includes 
  Fendlera 
  linearis, 
  sp. 
  nov., 
  from 
  Mexico 
  and 
  several 
  American 
  varieties 
  

   and 
  forms 
  in 
  various 
  genera. 
  

  

  Renner, 
  O. 
  Zur 
  Terminologie 
  des 
  pflanzlichen 
  Generationswechsels. 
  

   Biol. 
  Zentralbl. 
  36: 
  337-374. 
  20 
  Au 
  1916. 
  

  

  _ 
  « 
  

  

  Riddle, 
  L. 
  W. 
  Observations 
  on 
  the 
  genus 
  Acrospermiim. 
  Mycologia 
  

   ^2; 
  175-181. 
  pL 
  II. 
  7 
  Au 
  1920, 
  

  

  Includes 
  A, 
  Maxoni 
  Farlow, 
  sp. 
  nov. 
  

  

  Roberts, 
  H. 
  F. 
  The 
  relation 
  of 
  protein 
  content 
  to 
  variety 
  types 
  in 
  

   American 
  wheat. 
  Jour. 
  Agr. 
  Sci. 
  10; 
  121-134. 
  9 
  Jl 
  1920. 
  

  

  Roberts, 
  J. 
  W. 
  The 
  apple-blotch 
  and 
  bitter-rot 
  cankers. 
  Phytopath- 
  

   ology 
  10: 
  353-357- 
  18 
  Au 
  1920. 
  

  

  Romell, 
  L. 
  HCarifran 
  kommer 
  det 
  bruna 
  pulvret 
  a 
  ofre 
  sidan 
  af 
  

   Polyporus 
  applanatus 
  och 
  andra 
  Ga7ioderma-arter? 
  [with 
  English 
  

   summary] 
  Sv. 
  Bot. 
  Tidsk. 
  10: 
  341-34S. 
  1916. 
  

  

  Saccardo, 
  P. 
  A. 
  Notae 
  Mycologicae, 
  ser. 
  XXIX. 
  Micromycetes 
  

   dakotenses 
  et 
  utahenses 
  a 
  Doct. 
  J. 
  F. 
  Brenckle 
  lecti 
  et 
  communi- 
  

   catl. 
  Mycologia 
  12; 
  199-205. 
  7 
  Au 
  1920. 
  

  

  Includes 
  Pkaeotrype, 
  gen, 
  nov., 
  and 
  9 
  new 
  species 
  in 
  various 
  genera. 
  

  

  Sargent, 
  C. 
  S. 
  Notes 
  on 
  North 
  American 
  trees 
  — 
  ^VL 
  Jour. 
  Arnold 
  

   Arb. 
  i: 
  245-254. 
  Ap 
  1920. 
  

  

  Describes 
  several 
  new 
  species 
  and 
  varieties 
  in 
  Crataegus, 
  

  

  St. 
  John, 
  H. 
  Trillium 
  rectistamineum, 
  a 
  valid 
  species 
  of 
  the 
  south- 
  

   eastern 
  United 
  States. 
  Rhodora 
  22: 
  78t79. 
  18 
  Je 
  1920. 
  

  

  