﻿

  278 
  Index 
  to 
  Ameaican 
  botanical 
  literature 
  

  

  Wann, 
  F, 
  B. 
  The 
  fixation 
  of 
  free 
  nitrogen 
  by 
  green 
  plants. 
  Science 
  II. 
  

   6i: 
  247-248. 
  5 
  Mr 
  1920. 
  ' 
  ^ 
  

  

  Weatherby, 
  C. 
  A, 
  Hahenaria 
  psycodes 
  van 
  ecalcarata 
  in. 
  Vermont, 
  

   Rhodora 
  22: 
  31-32. 
  11 
  Mr 
  1920. 
  

  

  Weimer, 
  J. 
  L. 
  Some 
  observations 
  on 
  the 
  spore 
  discharge 
  of 
  Pleurage 
  

   ctirvicolla 
  (Wint.) 
  Kuntze. 
  Am. 
  Jour. 
  Bot. 
  7: 
  75-77. 
  10 
  Mr 
  1920. 
  

  

  Weimer, 
  J. 
  L. 
  The 
  distribution 
  of 
  buckeye 
  rot 
  of 
  tomatoes. 
  Phyto- 
  

   pathology 
  10: 
  172. 
  1920. 
  

  

  Weingart, 
  W. 
  Die 
  Blute 
  des 
  Cereus 
  aunvillus 
  K. 
  Sch. 
  Monats, 
  

   Kakteenk. 
  29; 
  6-10. 
  Ja 
  1919. 
  

  

  Weingart, 
  W. 
  Cereus 
  repandus 
  Haw. 
  und 
  Verwandte. 
  Monats. 
  

   Kakteenk. 
  29: 
  85-93. 
  Au 
  1919. 
  

  

  Weingart, 
  W. 
  Cereus 
  ruber 
  Weing. 
  Monats. 
  Kakteenk 
  29; 
  57-58. 
  

   My 
  1919, 
  

  

  Weingart, 
  W. 
  Frucht 
  des 
  Cereus 
  serralns 
  Weing. 
  Monats. 
  Kak- 
  

   teenk. 
  29: 
  93-94. 
  Au 
  1919. 
  

  

  Weingart, 
  W. 
  Vom 
  Reif 
  des 
  Cereus 
  trigonus 
  Haw. 
  var. 
  guatemalensis 
  

  

  Eichl. 
  

  

  8<>-84, 
  Jl 
  1919. 
  

  

  Wicks, 
  W. 
  H. 
  Effect 
  of 
  cross-pollination 
  on 
  size, 
  color, 
  shape 
  and 
  

  

  quality 
  of 
  the 
  apple. 
  Bull. 
  Univ. 
  Arkansas 
  Agr. 
  Exper. 
  Sta. 
  143: 
  

   pi 
  i-Q. 
  Mr 
  1918. 
  

  

  t 
  

  

  Wiegand, 
  K. 
  M. 
  A 
  new 
  species 
  of 
  Spergularia. 
  Rhodora 
  22: 
  15-16. 
  

   28 
  F 
  1920. 
  ' 
  

  

  Wiegand, 
  K. 
  , 
  M. 
  Variations 
  m 
  Lactuca 
  canadensis. 
  Rhodora 
  22: 
  

   9-1 
  1. 
  28 
  F 
  1920. 
  , 
  

  

  Wolf 
  

  

  F. 
  A. 
  A 
  bacterial 
  leaf 
  spot 
  of 
  velvet 
  bean. 
  Phytopathology 
  10: 
  

   73-80./. 
  1-2. 
  1920. 
  . 
  

  

  Aplanohacter 
  Slizolobii 
  n. 
  sp. 
  

  

  Wolf, 
  F. 
  A. 
  Bacterial 
  blight 
  of 
  soybean. 
  Phytopathology 
  lo: 
  119- 
  

   132. 
  /. 
  1-5. 
  1920. 
  

  

  + 
  

  

  Woolsey, 
  T. 
  S. 
  Natural 
  regeneration 
  of 
  French 
  forests. 
  Am. 
  For. 
  

   26: 
  77-81. 
  F 
  1920. 
  

  

  Wright, 
  G. 
  Pit-closing 
  membrane 
  in 
  Ophioglossaceae. 
  Bot. 
  Gaz. 
  69: 
  

   237-247- 
  pl- 
  II, 
  12. 
  +/. 
  14-19,^ 
  16 
  Mr 
  1920. 
  

  

  York, 
  H. 
  H. 
  Late 
  seasonal 
  production 
  of 
  aecia 
  of 
  Cronarlium 
  rihicola. 
  

   Phytopathology 
  10: 
  iii. 
  1920. 
  

  

  Zinn, 
  J. 
  On 
  variation 
  in 
  Tartary 
  buckwheat, 
  Fagopyrum 
  tataricum 
  

   (L.) 
  Gaertn. 
  Genetics 
  4: 
  534-586. 
  /. 
  11. 
  N 
  1919. 
  

  

  