﻿Apogamy 
  in 
  Osmunda 
  cinnamomea 
  and 
  0. 
  Claytoniana 
  

  

  Elizabeth 
  Dorothy 
  Wuist 
  Brown" 
  

  

  F 
  , 
  

  

  (with 
  10 
  TEXT 
  figures) 
  

  

  The 
  occurrence 
  of 
  apogamy 
  in 
  Osmtinda 
  cinnamomea 
  L. 
  and 
  

   0, 
  Claytoniana 
  L. 
  is 
  of 
  especial 
  Interest, 
  since 
  the 
  only 
  reported 
  case 
  

   of 
  apogamy 
  in 
  this 
  genus 
  is 
  given 
  by 
  Leitgeb.f 
  He 
  does 
  not 
  state 
  

   definitely 
  in 
  which 
  species 
  he 
  observed 
  apogamy 
  but 
  presumably 
  

   it 
  was 
  in 
  O. 
  regalis 
  L. 
  His 
  observations 
  have 
  never 
  been 
  confirmed, 
  

   although 
  attempts 
  have 
  been 
  made 
  by 
  workers 
  to 
  induce 
  apogamy 
  

   in 
  this 
  fern 
  under 
  varied 
  cultural 
  conditions. 
  

  

  The 
  cases 
  of 
  apogamy 
  described 
  in 
  this 
  paper 
  occurred 
  In 
  

   cultures 
  of 
  Osmunda 
  cinnamomea 
  and 
  0. 
  Claytoniana 
  with 
  which, 
  

   together 
  with 
  0, 
  regalis, 
  experiments 
  were 
  made 
  during 
  the 
  years 
  

   19 
  1 
  6-1 
  8 
  In 
  the 
  Osborn 
  Botanical 
  Laboratory 
  of 
  Yale 
  University. 
  

   The 
  writer 
  is 
  especially 
  indebted 
  to 
  Professor 
  A. 
  W. 
  Evans 
  for 
  

   many 
  helpful 
  suggestions 
  and 
  criticisms. 
  

  

  Material 
  

  

  The 
  spores 
  of 
  0. 
  regalis^ 
  O. 
  cinnamomea 
  and 
  0. 
  Claytoniana 
  

  

  two 
  

  

  lawns 
  about 
  New 
  Haven, 
  Connecticut, 
  and 
  from 
  sporophytes 
  

   growing 
  under 
  natural 
  environmental 
  conditions 
  in 
  Beaver 
  Swamp, 
  

   a 
  short 
  distance 
  from 
  that 
  city. 
  No 
  differences 
  were 
  observed 
  In 
  

   the 
  growth 
  and 
  development 
  of 
  the 
  prothallia 
  from 
  the 
  two 
  

  

  sources. 
  

  

  Collections 
  of 
  fertile 
  fronds 
  were 
  made 
  in 
  late 
  June 
  and 
  cultures 
  

   were 
  made 
  early 
  in 
  July. 
  The 
  cultures 
  were 
  made 
  by 
  sowing 
  the 
  

   spores 
  on 
  26 
  c.c. 
  of 
  Prantl's 
  and 
  Knop's 
  nutrient 
  solutions 
  and 
  

   their 
  modifications, 
  to 
  which 
  had 
  been 
  added 
  a 
  drop 
  of 
  a 
  i 
  per 
  

   cent 
  solution 
  of 
  ferric 
  chloride, 
  in 
  small 
  glass 
  capsules. 
  

  

  * 
  Contribution 
  from 
  the 
  Osborn 
  Botanical 
  Laboratory. 
  

  

  t 
  Die 
  Sprossbildung 
  an 
  apogamen 
  Farnprothallien. 
  Ber. 
  Deutsch. 
  Bot. 
  

  

  Ges. 
  3: 
  169-176. 
  1885. 
  

  

  339 
  

  

  