﻿Schaffner: 
  Diecious 
  nature 
  of 
  buffalo-grass 
  

  

  121 
  

  

  had 
  been 
  cultivated 
  fields, 
  entirely 
  devoid 
  of 
  buffalo-grass, 
  and 
  

   which 
  had 
  later 
  been 
  abandoned. 
  A 
  ravine 
  filled 
  deep 
  with 
  the 
  

   wash 
  of 
  surrounding 
  fields 
  was 
  also 
  studied. 
  

  

  !• 
  A 
  small 
  abandoned 
  field 
  much 
  tramped 
  by 
  cattle. 
  There 
  

   were 
  three 
  small, 
  pure, 
  staminate 
  patches 
  and 
  three 
  small, 
  pure, 
  

   carpellate 
  patches. 
  No 
  mixed 
  patches 
  were 
  found. 
  

  

  2. 
  An 
  abandoned 
  field, 
  now 
  in 
  pasture, 
  in 
  which 
  patches 
  of 
  

  

  buffalo-grass 
  have 
  become 
  

   follows 
  : 
  

  

  established. 
  The 
  patches 
  were 
  as 
  

  

  Carpellate 
  patches 
  

  

  

  Staminate 
  patches 
  

  

  No. 
  of 
  patches 
  : 
  

  

  Diameter 
  

  

  No. 
  of 
  patches. 
  

  

  Diameter 
  

  

  I 
  

   Z 
  

   I 
  

  

  3 
  

  

  9 
  ft. 
  

  

  7 
  •' 
  

   6 
  " 
  

  

  3 
  '• 
  

  

  

  " 
  I 
  

  

  1 
  

  

  •I 
  

  

  r 
  

  

  2 
  

  

  I 
  

  

  8 
  ft. 
  

   6 
  " 
  

  

  5 
  " 
  

   4 
  " 
  

   3 
  " 
  

  

  In 
  this 
  field 
  not 
  one 
  case 
  of 
  mingled 
  inflorescences 
  was 
  found. 
  

   All 
  the 
  patches 
  were 
  pure 
  and 
  were 
  mostly 
  blooming 
  abundantly, 
  

   some 
  patches 
  being 
  entirely 
  covered 
  with 
  inflorescences. 
  It 
  is 
  

   probable 
  that 
  each 
  of 
  these 
  patches 
  originated 
  from 
  a 
  single 
  seed. 
  

  

  3. 
  A 
  pasture 
  ra^'ine 
  filled 
  with 
  a 
  deep 
  layer 
  of 
  soil 
  washed 
  from 
  

   surrounding 
  fields. 
  The 
  new-formed 
  soil 
  was 
  covered 
  with 
  weeds 
  

   and 
  Kentucky 
  blue-grass 
  and 
  here 
  and 
  there 
  small 
  patches 
  of 
  

   bufTalo-grass 
  had 
  developed. 
  These 
  were 
  mostly 
  o\-cr 
  three 
  

   years 
  old 
  and 
  had 
  probably 
  gained 
  a 
  foothold 
  in 
  this 
  usually 
  rather 
  

   wet 
  soil 
  because 
  of 
  the 
  very 
  dry 
  seasons 
  of 
  1917 
  and 
  1918. 
  Most 
  

   of 
  the 
  patches 
  probably 
  developed 
  from 
  seed, 
  although 
  it 
  is 
  possible 
  

   thait 
  detached 
  stolons 
  may 
  have 
  been 
  washed 
  down 
  from 
  hillside 
  

   patches, 
  or 
  carried 
  in 
  the 
  feet 
  of 
  cattle. 
  Seventeen 
  isolated 
  patches 
  

   were 
  found 
  in 
  the 
  ravine. 
  There 
  were 
  ten 
  purely 
  carpellate 
  and 
  

   seven 
  purely 
  staminate. 
  In 
  no 
  case 
  was 
  such 
  a 
  small 
  patch 
  found 
  

   to 
  have 
  both 
  staminate 
  and 
  carpellate 
  inflorescences. 
  

  

  4. 
  An 
  abandoned 
  field 
  of 
  several 
  acres 
  turned 
  into 
  a 
  pasture, 
  

   after 
  being 
  sown 
  to 
  tame 
  grasses. 
  Patches 
  of 
  buffalo-grass, 
  some 
  

   of 
  considerable 
  size, 
  were 
  numerous. 
  They 
  were 
  either 
  of 
  pure 
  

   stand, 
  staminate 
  or 
  carpellate, 
  or 
  mixed. 
  The 
  mixed 
  patches 
  

   soTr.Pf;rT.f.c 
  hc^A 
  thf^ 
  rarnpllnfe 
  an(i 
  staminatc 
  inflorescences 
  com- 
  

  

  mi 
  

  

  The 
  patches 
  observed 
  are 
  tabulated 
  below; 
  

  

  