﻿358 
  T. 
  Holm 
  — 
  Studies 
  in 
  the 
  Cyperaceae. 
  

  

  culm, 
  stiff, 
  filiform, 
  scabrous, 
  their 
  sheaths 
  light-brown, 
  persist- 
  

   ing, 
  not 
  fibrillose 
  ; 
  spike 
  one, 
  androgynous, 
  few-flowered, 
  1 
  to 
  

   1-J 
  cm 
  long 
  ; 
  scales 
  of 
  male 
  flowers 
  ovate 
  -lanceolate 
  (fig. 
  A), 
  red- 
  

   dish-brown, 
  the 
  midrib 
  pale, 
  not 
  excurrent 
  ; 
  scales 
  of 
  female 
  

   flowers 
  (fig. 
  B) 
  broadly 
  obovate, 
  minutely 
  pointed 
  from 
  the 
  

   excurrent 
  midrib, 
  reddish-brown 
  with 
  narrow 
  membranaceous, 
  

   hyaline 
  margins 
  ; 
  female 
  flowers 
  three 
  or 
  four 
  ; 
  utriculns 
  mem- 
  

   branaceous 
  (fig. 
  E), 
  obovoid, 
  obtusely 
  triangular 
  in 
  cross-sec- 
  

   tion, 
  with 
  a 
  distinct 
  obliquely 
  cut 
  beak, 
  ciliate 
  above, 
  at 
  matur- 
  

   ity 
  longer 
  than 
  the 
  scale 
  ; 
  nerves 
  two, 
  not 
  distinct 
  ; 
  caryopsis 
  

   obovate, 
  sharply 
  triangular 
  in 
  cross-section 
  ; 
  rhacheola 
  none 
  ; 
  

   stigmas 
  three. 
  

  

  Habitat 
  : 
  Mountains 
  near 
  Pagosa 
  Peak, 
  southern 
  Colorado, 
  

   in 
  extensive 
  turf-like 
  patches 
  on 
  bald 
  tops, 
  at 
  12,000 
  feet 
  (C. 
  F. 
  

   Baker). 
  Yery 
  abundant 
  on 
  dry 
  rocks 
  at 
  12,000 
  feet 
  : 
  Mt. 
  

   Kelso 
  and 
  Mt. 
  Elbert, 
  middle 
  Colorado 
  (the 
  author). 
  

  

  Differs 
  from 
  C. 
  filifolia 
  Nutt., 
  especially 
  in 
  its 
  dark, 
  reddish- 
  

   brown 
  scales, 
  which 
  are 
  narrower, 
  and 
  by 
  the 
  utricle, 
  which 
  is 
  

   relatively 
  longer, 
  attenuated 
  at 
  both 
  ends 
  and 
  glabrous 
  except- 
  

   ing 
  the 
  ciliate 
  apex. 
  Boott's 
  C. 
  Lyoni 
  is 
  distinct 
  from 
  this 
  by 
  

   its 
  creeping 
  rhizome, 
  broader 
  leaves 
  and 
  linear-lanceolate, 
  

   bidentate 
  utricle. 
  Carex 
  ajfinis 
  R. 
  Br., 
  which 
  does 
  not 
  seem 
  

   to 
  be 
  well 
  understood, 
  has 
  been 
  referred 
  to 
  C. 
  filifolia 
  by 
  

   Boott, 
  but 
  later 
  on 
  to 
  C. 
  dbtusata 
  Liljebl. 
  by 
  the 
  same 
  author. 
  

   Professor 
  Bailey 
  has, 
  also, 
  referred 
  it 
  to 
  C. 
  ohtusata.* 
  

  

  Carex 
  oreocharis 
  Holm 
  (fig. 
  2). 
  

   {C.filifolia 
  Nutt. 
  var. 
  valida 
  Olney, 
  not 
  C. 
  valida 
  ISTees.) 
  

  

  Rhizome 
  cespitose, 
  culm 
  from 
  10 
  to 
  20 
  cm 
  high, 
  stiff, 
  some- 
  

   what 
  robust, 
  terete, 
  sulculate, 
  glabrous 
  ; 
  leaves 
  shorter 
  than 
  

   the 
  culm, 
  5 
  to 
  10 
  cm 
  long, 
  narrowly 
  conduplicate, 
  scabrous 
  along 
  

   the 
  margins 
  ; 
  leaf-sheaths 
  dark-brown, 
  almost 
  black, 
  persisting, 
  

   slightly 
  fibrillose 
  ; 
  spike 
  one, 
  androgynous 
  ; 
  male 
  portion 
  many- 
  

   flowered, 
  clavate, 
  1 
  to 
  1 
  J 
  cm 
  long, 
  whitish 
  and 
  shining 
  ; 
  scales 
  

   oblong-lanceolate 
  (fig. 
  C), 
  the 
  midrib 
  not 
  excurrent 
  ; 
  pistil- 
  

   late 
  flowers 
  3 
  to 
  7 
  ; 
  scales 
  (fig. 
  D) 
  ovate-acuminate 
  sharply 
  

   pointed, 
  the 
  lowest 
  one 
  leaf-like 
  with 
  a 
  distinct 
  awn 
  from 
  the 
  

   excurrent 
  midrib 
  ; 
  utriculus 
  membranaceous, 
  broadly 
  elliptic 
  

   (fig. 
  F), 
  obtusely 
  triangular 
  in 
  cross-section, 
  with 
  a 
  short 
  beak, 
  

   minutely 
  pubescent, 
  two-nerved, 
  but 
  the 
  nerves 
  not 
  distinct 
  ; 
  at 
  

   maturity 
  the 
  utricle 
  is 
  longer 
  than 
  the 
  scale, 
  excepting 
  the 
  

   lower 
  one 
  ; 
  caryopsis 
  nearly 
  globular, 
  obtusely 
  angled 
  ; 
  rhach- 
  

   eola 
  distinct 
  as 
  in 
  C. 
  filifolia 
  ; 
  stigmas 
  three. 
  

  

  * 
  Bailey, 
  L. 
  H. 
  : 
  Studies 
  of 
  the 
  types 
  of 
  various 
  species 
  of 
  the 
  genus 
  Carex. 
  

   (Mem. 
  Torr. 
  Bot. 
  Club, 
  vol. 
  i.) 
  

  

  