﻿no 
  BOTANICAL 
  GAZETTE. 
  [May, 
  

  

  relationships, 
  I 
  am 
  obliged 
  to 
  consider 
  it 
  a 
  new 
  genus, 
  which 
  I 
  

   will 
  designate 
  by 
  the 
  name 
  of 
  Rhaeliidospeniiuui 
  Mexicauuui. 
  

  

  National 
  Herharmm, 
  Washinoton, 
  D. 
  C, 
  

  

  Grasses 
  in 
  the 
  wrong 
  genus. 
  

  

  W. 
  J, 
  BEAL. 
  

  

  In 
  a 
  recent 
  study 
  of 
  our 
  species 
  of 
  Aristida, 
  Stipa, 
  and 
  

  

  ^•zopsis, 
  It 
  seemed 
  to 
  me 
  best 
  to 
  slightly 
  modify 
  or 
  extend 
  

  

  characters 
  of 
  the 
  two 
  latter 
  fienera 
  and 
  restore 
  Nuttall's 
  

  

  Oryzopsis 
  

  

  _ 
  - 
  -■'"''.-WW,-* 
  ^'wiAV-*ciCillV» 
  1 
  V-OCV-'l 
  X- 
  J.1UI.I.V***- 
  

  

  genus 
  Eriocoma. 
  In 
  accordance 
  with 
  this 
  plan, 
  four 
  species 
  

   formerly 
  placed 
  under 
  Stipa 
  should 
  take 
  positions 
  under 
  Ory- 
  

   zopsis. 
  I 
  expressed 
  my 
  views 
  in 
  regard 
  to 
  such 
  a 
  position 
  

   lor 
  these 
  species 
  in 
  a 
  letter 
  to 
  Professor 
  F. 
  L. 
  Scribner, 
  and 
  

   to 
  them 
  he 
  fully 
  agrees. 
  I 
  present 
  the 
  descriptions 
  of 
  Stipa, 
  

   Ury-zopsis, 
  and 
  the 
  four 
  species 
  in 
  question. 
  

  

  Stipa 
  L. 
  Spikelets 
  i-flowered, 
  on 
  slender 
  spreading 
  

   pedicels 
  or 
  nearly 
  sessile 
  in 
  a 
  terminal 
  panicle, 
  rachilla 
  artic- 
  

   ulate 
  above 
  the 
  empty 
  glumes 
  : 
  the 
  two 
  empty 
  glumes 
  nar- 
  

   rovy, 
  penstent, 
  membranous, 
  keeled, 
  unawned 
  of 
  rarely 
  with 
  

   a 
  slender 
  awn: 
  floral 
  glume 
  narrow, 
  rigid, 
  rolled 
  around 
  the 
  

   houer, 
  usually 
  with 
  a 
  curved 
  short-pointed 
  hairy 
  callus 
  at 
  

   me 
  base, 
  and 
  a 
  terminal 
  undivided 
  bent 
  awn 
  closely 
  and 
  spi- 
  

   rally 
  twisted 
  below 
  the 
  bend, 
  sometimes 
  with 
  a 
  tooth 
  on 
  each 
  

  

  \^1. 
  T 
  "^y 
  ^^^'"^^ 
  ^he 
  a^^-n 
  tardily 
  separating 
  by 
  a 
  

  

  joint 
  or 
  rarely 
  persistent 
  : 
  palea 
  enclosed 
  by 
  the 
  floral 
  glume, 
  

   2-neryed 
  : 
  lodicules 
  often 
  3 
  and 
  large 
  : 
  stamens 
  3 
  ; 
  anthers 
  

   of^ten 
  tipped 
  with 
  a 
  tuft 
  of 
  short 
  hairs 
  : 
  styles 
  short, 
  distinct: 
  

   caryopsis 
  narrow, 
  subterete, 
  enclosed 
  by 
  the 
  floral 
  glume, 
  

   often 
  rn;~W^^'^'-"''^^">^ 
  ^^" 
  grasses, 
  the 
  narrow 
  leaves 
  

   aided 
  1? 
  '1? 
  ''.'"•''' 
  '"^^^^^^- 
  The 
  ciliate 
  hairs 
  on 
  the 
  stipe. 
  

   the 
  graiVin'thr'son^ 
  '""^ 
  "^"^^^ 
  -' 
  ^he 
  awn, 
  often 
  burV 
  

   Oryzopsis 
  Michx. 
  Spikelets 
  i-flowered, 
  usually 
  ovoid 
  

   ^1 
  5' 
  P'^'"'^'^^^'^?' 
  ^^'^hilla 
  articulate 
  above 
  the 
  lower 
  

  

  (rhim«^ 
  ^^*. 
  -— 
  -, 
  xci,„iiii,a 
  ai 
  LlCUiaiC 
  aDOVC 
  tUe 
  1U\\''' 
  

  

  b 
  m 
  nV 
  tr 
  P^'f 
  ^^^^^ 
  above 
  the 
  flower, 
  with 
  a 
  very 
  short 
  

   o 
  U 
  e 
  ou 
  er 
  ""/l 
  .^ 
  l""" 
  '' 
  '"'P'^ 
  S^^^^es 
  2, 
  persistent^ 
  equal 
  

   ed 
  convex 
  on 
  I 
  ^^°'''i' 
  ^^"«^^^' 
  ^^^^^^ 
  or 
  abruptly 
  point- 
  

   er 
  'than 
  th°tl^ 
  ^f 
  ^ 
  '' 
  ^""'"'^ 
  g^^"^^ 
  broad, 
  shorter 
  or 
  long- 
  

   than 
  the 
  other 
  glumes, 
  membranous 
  becoming 
  hard, 
  ob- 
  

  

  