﻿486 
  Index 
  to 
  American 
  botanical 
  litepature 
  

  

  Russell, 
  A. 
  M, 
  A 
  comparative 
  study 
  of 
  Floerkea 
  proserpinacoides 
  and 
  

  

  allies- 
  Contr. 
  Bot. 
  Lab. 
  Univ. 
  Pennsylvania 
  4: 
  401-418. 
  pL 
  gi, 
  92. 
  

   1920. 
  

  

  Russell, 
  A. 
  M. 
  The 
  macroscopic 
  and 
  microscopic 
  structure 
  of 
  some 
  

   hybrid 
  sarracenias 
  compared 
  with 
  that 
  of 
  their 
  parents. 
  Contr. 
  

   Bot. 
  Lab. 
  Univ. 
  Pennsylvania 
  5: 
  3-41. 
  pi. 
  1-5. 
  1920. 
  

  

  St. 
  John, 
  H., 
  & 
  White^ 
  D. 
  The 
  genus 
  Galinsoga 
  in 
  North 
  America, 
  

   Rhodora 
  22; 
  97-101. 
  24 
  Jl 
  1920. 
  

  

  2 
  new 
  species, 
  G. 
  purpurea 
  from 
  Bolivia 
  and 
  G. 
  hicolorata 
  from 
  Mexico- 
  

  

  Sanzin, 
  R. 
  Las 
  verbenaceas. 
  Contribucion 
  a 
  la 
  flora 
  de 
  Mendoza. 
  

   An. 
  Soc. 
  Cien. 
  Argentina 
  88: 
  95-134./. 
  1-3S' 
  ^Q^Q- 
  

  

  Schiffner, 
  V. 
  Die 
  systematisch-phylogenetische 
  Forschung 
  in 
  der 
  

   Hepaticologie 
  seit 
  dem 
  Erscheinen 
  der 
  Synopsis 
  Hepaticarum 
  und 
  

   liber 
  die 
  Abstammung 
  der 
  Bryophyten 
  und 
  Pteridophyten. 
  Progr. 
  

   Rei 
  Bot. 
  5: 
  387-520. 
  1917. 
  

  

  Schlechter, 
  R. 
  Die 
  Gattung 
  Fernandezta 
  Ruiz 
  et 
  Pav. 
  Rep. 
  Sp. 
  Nov. 
  

   Regn. 
  Veg. 
  16; 
  345-349- 
  . 
  3^ 
  Ap 
  1920. 
  

  

  Schmitz, 
  H. 
  Enzyme 
  action 
  in 
  Echinodontinm 
  tinctorium 
  Ellis 
  and 
  

   Everhart. 
  Jour. 
  Gen. 
  Physiol. 
  2: 
  613-616. 
  20 
  Je 
  1920. 
  . 
  

  

  Schultz, 
  E. 
  S., 
  & 
  Folsom, 
  D. 
  Transmission 
  of 
  the 
  mosaic 
  disease 
  of 
  

   Irish 
  potatoes. 
  Jour. 
  Agr. 
  Res. 
  29; 
  315-337. 
  pL 
  49-56. 
  i 
  Jl 
  1920- 
  

  

  Shamel, 
  A. 
  D. 
  Origin 
  of 
  a 
  grape-fruit 
  variety 
  having 
  pinlc-colored 
  

   fruits. 
  Jour. 
  Hercd. 
  11: 
  157, 
  158./. 
  5-^. 
  6 
  Je 
  1920. 
  

  

  Sifton, 
  H. 
  B. 
  Longevity 
  of 
  the 
  seeds 
  of 
  cereals, 
  clovers, 
  and 
  timothy. 
  

   Am. 
  Jour. 
  Bot. 
  7: 
  243-251./. 
  1-5, 
  29 
  Jl 
  1920. 
  

  

  Small, 
  J. 
  K. 
  Cape 
  Sable 
  region 
  of 
  Florida. 
  1-27. 
  pL 
  1-6. 
  1919- 
  

  

  w 
  

  

  Small, 
  J. 
  K. 
  Hydrangea 
  quercifolia, 
  Addisonia 
  5: 
  29, 
  30. 
  pi. 
  17 
  S' 
  

   30 
  Je 
  1920. 
  

  

  SmaU, 
  J. 
  K. 
  The 
  land 
  of 
  ferns. 
  Jour. 
  Elisha 
  Mitchell 
  Sci. 
  Soc. 
  35 
  = 
  

   92-104. 
  pi. 
  24-28. 
  Je 
  1920. 
  

  

  Snyder, 
  F. 
  D. 
  The 
  Yucca 
  plant 
  and 
  its 
  insect 
  ally. 
  Gard. 
  Mag. 
  31-' 
  

   326, 
  327. 
  Jl 
  1920. 
  [Illust.] 
  

  

  J 
  

  

  Steckbeck, 
  D. 
  W. 
  The 
  comparative 
  histology 
  and 
  irritability 
  of 
  

   sensitive 
  plants. 
  Contr. 
  Bot. 
  Lab. 
  Univ. 
  Pennsylvania 
  4: 
  185-230. 
  

   pL 
  58-65. 
  1920- 
  

  

  r 
  

  

  Sterrett, 
  W. 
  D. 
  Jack 
  pine. 
  U. 
  S, 
  Dept. 
  Agr. 
  Bull. 
  820. 
  1-47. 
  pi 
  

   I- 
  16 
  +f. 
  1-4. 
  22 
  My 
  1920. 
  

  

  Stevens, 
  O. 
  A. 
  The 
  geographical 
  distribution 
  of 
  North 
  Dakota 
  plants. 
  

   Am. 
  Jour. 
  Bot. 
  7: 
  231-242./. 
  j. 
  29 
  Jl 
  1920. 
  

  

  