﻿1890.] 
  BOTANICAL 
  GAZETTE. 
  Ill 
  

  

  tiise 
  or 
  truncate, 
  usually 
  producing 
  a 
  terminal 
  caducous 
  awn 
  

   which 
  is 
  more 
  or 
  less 
  loosely 
  bent 
  near 
  the 
  base 
  : 
  palea 
  2- 
  

   keeled 
  : 
  stamens 
  3 
  : 
  lodicules 
  2, 
  conspicuous: 
  styles 
  short 
  or 
  

   long, 
  distinct: 
  caryopsis 
  oblong 
  or 
  ovate, 
  enclosed 
  by 
  the 
  

   hardened 
  floral 
  glume 
  and 
  palea, 
  but 
  free. 
  — 
  Tufted 
  perenni- 
  

   als 
  ; 
  leaves 
  broad 
  and 
  flat 
  or 
  narrow 
  and 
  involute 
  ; 
  panicle 
  

   terminal, 
  lax, 
  

  

  0. 
  Richardsonii. 
  Culms 
  rather 
  slender, 
  5 
  to 
  9 
  dm, 
  long: 
  

   radical 
  leaves 
  scabrid, 
  slender, 
  2 
  to 
  4 
  dm. 
  long, 
  those 
  of 
  the 
  

   culm 
  3, 
  flat 
  or 
  soon 
  involute, 
  the 
  largest 
  2 
  mm. 
  wide, 
  the 
  up- 
  

   per 
  one 
  I 
  to 
  2 
  dm. 
  long; 
  sheaths 
  much 
  shorter 
  than 
  the 
  in- 
  

   ternodes 
  ; 
  ligule 
  about 
  2 
  mm. 
  on 
  the 
  low^er 
  leaves 
  and 
  5 
  mm. 
  

   on 
  the 
  upper 
  : 
  panicle 
  exserted 
  on 
  the 
  culm 
  2 
  to 
  3 
  dm., 
  loose, 
  

   slender, 
  7 
  to 
  12 
  cm. 
  long, 
  branches 
  mostly 
  in 
  pairs, 
  the 
  long- 
  

   est 
  2 
  to 
  4 
  cm. 
  long 
  and 
  bearing 
  a 
  few 
  spikelets 
  near 
  its 
  apex 
  : 
  

   empty 
  glumes 
  subequal, 
  oblong, 
  acutish, 
  brittle 
  when 
  mature, 
  

   mostly 
  3-nerved, 
  4 
  to 
  5 
  mm. 
  long; 
  floral 
  pubescent, 
  linear- 
  

   oblong, 
  becoming 
  dark 
  brown, 
  about 
  3 
  mm. 
  long; 
  awn 
  tor- 
  

   tuous, 
  slightly 
  twisted, 
  9 
  to 
  16 
  ram. 
  long. 
  — 
  Stifa 
  Richard- 
  . 
  

   sonii 
  Link. 
  

  

  0. 
  Mongolica. 
  A 
  slender 
  erect 
  grass 
  about 
  3 
  dm. 
  high: 
  

   leaves 
  rigid, 
  very 
  slender, 
  involute, 
  those 
  of 
  the 
  radical 
  tufts 
  

   half 
  as 
  long 
  as 
  the 
  culm, 
  those 
  ot 
  the 
  culm 
  2, 
  3 
  to 
  5 
  cm. 
  long 
  ; 
  

   the 
  sheaths 
  shorter 
  than 
  the 
  internodes 
  ; 
  ligule 
  about 
  2 
  mm. 
  

   long: 
  panicle 
  exserted, 
  loose, 
  few^-flowered, 
  4 
  to 
  8 
  cm. 
  long, 
  

   the 
  low^er 
  rays 
  in 
  twos 
  or 
  threes 
  : 
  empty 
  glumes 
  membran- 
  

   ous, 
  subequal, 
  purplish, 
  obtuse, 
  5 
  to 
  6 
  mm. 
  long, 
  first 
  3- 
  

   nerved, 
  second 
  3 
  to 
  5-nerved: 
  floral 
  glume 
  slightly 
  hairy, 
  

   about 
  4,5 
  mm. 
  long 
  including 
  the 
  sharp 
  almost 
  obtuse 
  callus 
  

   and 
  the 
  2-toothed 
  apex; 
  awn 
  irregularly 
  bent 
  and^ 
  plumose 
  

   throughout, 
  nearly 
  2 
  mm. 
  long: 
  palea 
  as 
  long 
  as 
  its 
  glume 
  

   or 
  longer: 
  stamens 
  3. 
  — 
  Stifa 
  MongoJica 
  Turcz. 
  

  

  0. 
  cadnca. 
  Culms 
  erect, 
  rather 
  stout, 
  about 
  6 
  dm. 
  high: 
  

   leaves 
  of 
  the 
  culm 
  3, 
  smooth, 
  involute, 
  with 
  long 
  slender 
  

   points, 
  the 
  second 
  one 
  reaching 
  nearly 
  to 
  the 
  base 
  of 
  the 
  

   panicle, 
  the 
  thn^d 
  12 
  to 
  18 
  cm. 
  long, 
  "sometimes 
  extending 
  

   beyond 
  the 
  panicle 
  ; 
  sheaths 
  shorter 
  than 
  the 
  internodes, 
  cli- 
  

   mate 
  on 
  the 
  margins 
  ; 
  ligule 
  3 
  to 
  4 
  mm. 
  long 
  : 
  panicle 
  but 
  lit- 
  

   tle 
  exserted, 
  open, 
  10 
  to 
  20 
  cm. 
  long, 
  branches 
  in 
  twos 
  and 
  

   threes, 
  the 
  half 
  whorls 
  3 
  to 
  4 
  cm. 
  distant, 
  flower-bearing 
  

   along 
  the 
  upper 
  third 
  : 
  empty 
  glumes 
  dull 
  green, 
  tinged 
  wath 
  

   purple, 
  equal 
  or 
  the 
  first 
  a 
  little 
  longer, 
  elliptical-lanceolate 
  

   ^vhen 
  the 
  apex 
  is 
  spread, 
  strongly 
  3-neryed. 
  6 
  to 
  7 
  mm. 
  long 
  : 
  

   floret 
  elliptical, 
  5 
  mm. 
  long 
  from 
  the 
  short 
  scarcely 
  acute 
  

  

  