﻿206 
  T. 
  Holm 
  — 
  Studies 
  in 
  the 
  Cyperacece. 
  

  

  closely 
  allied 
  as 
  C. 
  cmspitosa 
  L., 
  C. 
  Hudsonii 
  A. 
  Benn. 
  

   (C. 
  stricta 
  Good.) 
  on 
  the 
  one 
  side, 
  and 
  C. 
  vulgaris 
  Fries, 
  

   C. 
  turfosa 
  Fries 
  on 
  the 
  other. 
  Furthermore 
  in 
  the 
  Dac- 
  

   tylostachyce 
  both 
  types 
  of 
  shoots 
  are 
  equally 
  frequent, 
  

   while 
  the 
  other 
  structures 
  are 
  nearly 
  the 
  same. 
  A 
  mono- 
  

   podial 
  ramification 
  is 
  relatively 
  rare, 
  but 
  well 
  marked 
  in 
  

   C. 
  digitata 
  L., 
  C. 
  maxima 
  Scop., 
  and 
  indeed 
  quite 
  fre- 
  

   quent 
  in 
  the 
  Lejochlcencs. 
  But 
  neither 
  the 
  rare 
  monopo- 
  

   dium 
  nor 
  the 
  very 
  little 
  frequent 
  aphyllopodic 
  culm 
  play 
  

   any 
  role 
  of 
  importance 
  to 
  the 
  establishment 
  of 
  the 
  greges, 
  

   although 
  both 
  constitute 
  characters 
  that 
  are 
  absolutely 
  

   constant. 
  — 
  

  

  EXPLANATION 
  OF 
  FIGURES. 
  

  

  Fig. 
  1. 
  Carex 
  Franklinii 
  Boott, 
  the 
  inflorescence, 
  natural 
  size. 
  

  

  Fig. 
  2. 
  Same 
  species, 
  scale 
  of 
  a 
  pistillate 
  flower; 
  enlarged. 
  

  

  Fig. 
  3. 
  Same 
  species, 
  perigynium, 
  ventral 
  face; 
  enlarged. 
  

  

  Fig. 
  4. 
  Same 
  species, 
  perigynium, 
  longitud. 
  section 
  to 
  show 
  the 
  stipi- 
  

   tate 
  ovary; 
  enlarged. 
  

  

  Fig. 
  5. 
  Carex 
  spectabilis 
  Dew., 
  scale 
  of 
  pistillate 
  flower; 
  enlarged. 
  

  

  Fig. 
  6. 
  Same 
  species, 
  perigynium 
  ; 
  " 
  enlarged. 
  

  

  Fig. 
  7. 
  Same 
  species, 
  var. 
  gelida 
  nob. 
  from 
  Alberta; 
  the 
  inflor- 
  

   escence; 
  natural 
  size. 
  

  

  Fig. 
  8. 
  Same 
  species, 
  var. 
  gelida, 
  scale 
  of 
  pistillate 
  flower, 
  side 
  view; 
  

   enlarged. 
  

  

  Fig. 
  9. 
  Same 
  species, 
  var. 
  gelida, 
  perigynium; 
  enlarged. 
  

  

  Fig. 
  10. 
  Same 
  species, 
  var. 
  superba 
  nob. 
  from 
  Alberta; 
  the 
  inflores- 
  

   cence; 
  natural 
  size. 
  

  

  Fig. 
  11. 
  Same 
  species, 
  var. 
  superba, 
  scale 
  of 
  pistillate 
  flower; 
  enlarged. 
  

  

  Fig. 
  12. 
  Same 
  species, 
  var. 
  superba, 
  perigynium; 
  enlarged. 
  

  

  Fig. 
  13. 
  Same 
  species, 
  var. 
  elegantida 
  nob. 
  from 
  British 
  Columbia, 
  scale 
  

   of 
  pistillate 
  flower, 
  side 
  view; 
  enlarged. 
  

  

  Fig. 
  14. 
  Same 
  species, 
  var. 
  elegantula, 
  perigynium; 
  enlarged. 
  

  

  Fig. 
  15. 
  Same 
  species, 
  forma 
  alpina 
  nob. 
  from 
  Alberta, 
  the 
  inflores- 
  

   cence; 
  natural 
  size. 
  

  

  Clinton, 
  Md., 
  January, 
  1920. 
  

  

  