﻿T. 
  Holm 
  — 
  Studies 
  in 
  the 
  Cyperacece. 
  203 
  

  

  ginato 
  attenuati. 
  (Figs. 
  7-9.) 
  Alberta: 
  above 
  timber- 
  

   line, 
  Mt. 
  Edith 
  Cavell; 
  British 
  Columbia: 
  Asulcan 
  

   Glacier 
  ; 
  Washington 
  : 
  Mount 
  Paddo, 
  about 
  2,000 
  m. 
  alt 
  

  

  Very 
  conspicuous 
  is 
  the 
  variation 
  expressed 
  by 
  the 
  

   two 
  varieties 
  superba 
  and 
  elegantula, 
  in 
  which 
  the 
  squa- 
  

   mae 
  of 
  the 
  pistillate 
  as 
  well 
  as 
  the 
  staminate 
  flowers 
  are 
  

   aristate; 
  in 
  all 
  the 
  others, 
  including 
  the 
  typical 
  plant, 
  

   the 
  squamae 
  of 
  the 
  staminate 
  flowers 
  are 
  obtuse 
  with 
  no 
  

   indication 
  of 
  a 
  mucro. 
  

  

  While 
  the 
  typical 
  plant 
  inhabits 
  open, 
  grassy 
  slopes 
  

   of 
  the 
  mountains 
  below 
  timber-line, 
  the 
  vars. 
  superba 
  

   and 
  elegantula 
  follow 
  the 
  water-courses, 
  bordered 
  with 
  

   thickets; 
  the 
  var. 
  gelida 
  and 
  the 
  forma 
  alpina 
  occur 
  at 
  

   higher 
  elevations, 
  passing 
  the 
  timber-line; 
  the 
  forma 
  

   chrysantha 
  grows 
  with 
  the 
  type. 
  

  

  And 
  although 
  these 
  plants 
  exhibit 
  quite 
  a 
  different 
  

   aspect 
  with 
  regard 
  to 
  habit, 
  densely 
  matted 
  or 
  stoloni- 
  

   ferous, 
  and 
  color 
  of 
  spikes, 
  they 
  nevertheless 
  may 
  be 
  

   readily 
  referred 
  to 
  one 
  species, 
  G. 
  spectabilis 
  Dew. 
  A 
  

   corresponding 
  variation 
  is 
  known 
  from 
  a 
  number 
  of 
  

   other 
  Carices, 
  so 
  excellently 
  described 
  by 
  1ST. 
  I. 
  Anders- 
  

   son, 
  6 
  with 
  reference 
  to 
  G. 
  vesicaria 
  L., 
  G. 
  Buxbaumii 
  

   Wahlenb., 
  G. 
  rigida 
  Good, 
  etc. 
  

  

  Thus 
  at 
  middle 
  elevations 
  in 
  the 
  mountains 
  we 
  find 
  the 
  

   typical 
  plant 
  growing 
  on 
  open 
  grassy, 
  stony 
  slopes 
  ; 
  the 
  

   rhizome 
  is 
  densely 
  matted, 
  the 
  spikes 
  pedunculate, 
  

   remote, 
  spreading; 
  the 
  staminate 
  and 
  pistillate 
  spikes 
  

   with 
  reddish-brown 
  squamae, 
  the 
  former 
  obtuse, 
  the 
  lat- 
  

   ter 
  mucronate; 
  the 
  perigynium 
  mostly 
  pale 
  green 
  with 
  

   the 
  beak 
  bidentate 
  or, 
  sometimes 
  merely 
  emarginate. 
  

   In 
  the 
  thickets, 
  that 
  border 
  the 
  mountain-brooks, 
  the 
  

   var. 
  superba 
  occurs 
  ; 
  a 
  taller 
  and 
  more 
  slender 
  plant 
  

   than 
  the 
  type 
  ; 
  the 
  rhizome 
  bears 
  long, 
  ascending 
  stolons, 
  

   and 
  the 
  culm 
  is 
  slightly 
  nodding 
  at 
  apex 
  ; 
  the 
  spikes 
  are 
  

   longer, 
  and 
  the 
  pistillate 
  almost 
  nodding, 
  borne 
  on 
  long, 
  

   slender 
  peduncles; 
  all 
  the 
  spikes 
  are 
  of 
  a 
  dark, 
  almost 
  

   black 
  color, 
  and 
  the 
  squamae 
  are 
  aristate 
  ; 
  the 
  perigynium 
  

   is 
  purplish 
  spotted, 
  and 
  the 
  beak 
  distinctly 
  bidentate. 
  

   At 
  similar 
  situations 
  in 
  the 
  Chilliwack 
  Valley 
  the 
  var. 
  

   elegantula 
  occurs 
  with 
  the 
  same 
  habit 
  and 
  color, 
  but 
  

   even 
  more 
  slender 
  in 
  all 
  respects, 
  with 
  the 
  squamae 
  

   emarginate, 
  aristate 
  and 
  with 
  the 
  slender 
  perigynium 
  

   merely 
  emarginate. 
  Just 
  above 
  timber-line 
  the 
  var. 
  

  

  6 
  Andersson, 
  N. 
  I.: 
  Skandinaviens 
  Cyperaeeer. 
  Stockholm, 
  1849. 
  

  

  