﻿204 
  T. 
  Holm 
  — 
  Studies 
  in 
  the 
  Cyperacece. 
  

  

  gelida 
  appears 
  ; 
  it 
  is 
  of 
  lower 
  stature 
  than 
  the 
  type 
  ; 
  the 
  

   spikes 
  are 
  more 
  or 
  less 
  contiguous, 
  erect; 
  the 
  squamae 
  

   are 
  mucronate, 
  of 
  a 
  dark 
  purplish 
  color 
  ; 
  the 
  perigynium 
  

   is 
  also 
  of 
  a 
  dark 
  color, 
  with 
  the 
  beak 
  merely 
  emarginate. 
  

   At 
  higher 
  elevations 
  we 
  meet 
  with 
  the 
  alpine 
  form 
  with 
  

   the 
  culms 
  and 
  leaves 
  short, 
  with 
  the 
  spikes, 
  including 
  the 
  

   stamihate, 
  very 
  short 
  and 
  thick; 
  the 
  squamae 
  are 
  almost 
  

   black, 
  while 
  the 
  perigynium 
  is 
  pale 
  green, 
  and 
  the 
  orifice 
  

   of 
  the 
  beak 
  slightly 
  emarginate. 
  By 
  comparing 
  the 
  

   habit 
  and 
  structure 
  of 
  these 
  various 
  plants, 
  the 
  varieties 
  

   elegantula 
  and 
  superba 
  may 
  be 
  defined 
  as 
  sciaphilous, 
  

   the 
  others 
  as 
  heliophilous 
  types, 
  and 
  the 
  correlation 
  

   between 
  environment 
  and 
  structure 
  seems 
  well 
  marked 
  

   in 
  these. 
  

  

  If 
  we 
  compare 
  now 
  these 
  various 
  plants, 
  representing 
  

   C. 
  spectabilis 
  Dew., 
  with 
  C. 
  macrochceta 
  C. 
  A. 
  Mey., 
  as 
  

   suggested 
  by 
  Clarke 
  (in 
  litteris, 
  1. 
  a), 
  they 
  certainly 
  

   appear 
  specifically 
  distinct. 
  In 
  typical 
  C. 
  macrochceta 
  

   as 
  well 
  as 
  in 
  the 
  varieties 
  emarginata 
  nob., 
  and 
  macro- 
  

   chlcena 
  nob. 
  7 
  the 
  perigynium 
  is 
  pale 
  green 
  above, 
  whitish 
  

   below, 
  distinctly 
  several-nerved, 
  and 
  the 
  beak 
  is 
  entire; 
  

   the 
  nut 
  is 
  not 
  stipitate. 
  The 
  squamae 
  of 
  the 
  staminate 
  

   and 
  pistillate 
  flowers 
  are 
  prominently 
  aristate 
  in 
  the 
  

   type 
  and 
  the 
  var. 
  emarginata, 
  while 
  simply 
  mucronate 
  

   in 
  var. 
  macro 
  chlcena. 
  In 
  all 
  the 
  plants 
  the 
  rhizome 
  is 
  

   densely 
  matted, 
  the 
  spikes 
  drooping 
  on 
  long 
  filiform 
  

   peduncles, 
  and 
  the 
  squamae 
  are 
  black 
  with 
  the 
  arista 
  light 
  

   green. 
  A 
  striking 
  analogy 
  exists 
  between 
  the 
  two 
  varie- 
  

   ties 
  elegantula 
  (C. 
  spectabilis) 
  and 
  emarginata 
  (G. 
  

   macrocliceta), 
  but 
  the 
  habit 
  is 
  quite 
  distinct, 
  beside 
  the 
  

   structure 
  and 
  color 
  of 
  the 
  perigynia. 
  With 
  respect 
  to 
  

   the 
  systematic 
  position 
  of 
  these 
  two 
  species, 
  we 
  have 
  

   placed 
  C. 
  spectabilis 
  Dew. 
  8 
  as 
  a 
  desciscent 
  type 
  of 
  the 
  

   Melananthce, 
  allied 
  to 
  C. 
  Tolmiei 
  Boott 
  and 
  C. 
  Montanen- 
  

   sis 
  Bail. 
  C. 
  macrochceta, 
  on 
  the 
  other 
  hand, 
  we 
  have 
  

   placed 
  in 
  the 
  grex 
  Morastachyce 
  on 
  account 
  of 
  the 
  droop- 
  

   ing 
  spikes, 
  and 
  the 
  structure 
  of 
  utriculus. 
  As 
  defined 
  by 
  

   Drejer 
  the 
  Morastachyce 
  comprise 
  mostly 
  distigmatic 
  

   species, 
  but 
  pass 
  gradually 
  into 
  some 
  tristigmatic, 
  the 
  

   most 
  evolute 
  species 
  of 
  the 
  grex, 
  viz 
  : 
  C. 
  nesophila 
  nob., 
  

   C. 
  macrochceta 
  C. 
  A. 
  Mey., 
  C. 
  Magellanica 
  Lam. 
  (with 
  all 
  

   the 
  spikes 
  gynaecandrous), 
  etc. 
  — 
  

  

  7 
  The 
  author: 
  New 
  or 
  little 
  known 
  species 
  of 
  Carex 
  (1. 
  c.) 
  

  

  8 
  The 
  author: 
  Greges 
  Caricum 
  (this 
  Journal, 
  vol. 
  16, 
  p. 
  445, 
  Dec, 
  1903) 
  

  

  