﻿T. 
  Holm 
  — 
  Studies 
  in 
  the 
  Cyjperacem. 
  363 
  

  

  trast 
  to 
  C. 
  oreocharis, 
  where 
  the 
  lacunes 
  are 
  much 
  narrower 
  

   and 
  located 
  in 
  the 
  palisade-tissue 
  itself 
  ; 
  furthermore 
  the 
  well 
  

   developed 
  bulliform-cells 
  in 
  the 
  latter 
  species, 
  while 
  these 
  are 
  

   totally 
  absent 
  in 
  the 
  others. 
  

  

  There 
  appears, 
  thus, 
  to 
  be 
  several 
  both 
  morphological 
  and 
  

   anatomical 
  characters 
  bj 
  which 
  these 
  three 
  species 
  may 
  readily 
  

   be 
  distinguished 
  from 
  each 
  other, 
  and 
  which, 
  moreover, 
  seem 
  

   to 
  justify 
  the 
  separation 
  of 
  these 
  plants 
  as 
  independent 
  species. 
  

   It 
  would 
  hardly 
  be 
  natural 
  to 
  consider, 
  for 
  instance, 
  0. 
  elynoides 
  

   as 
  a 
  merely 
  alpine 
  variety 
  of 
  O. 
  filifolia, 
  since 
  the 
  latter 
  is 
  

   often 
  an 
  inhabitant 
  itself 
  of 
  the 
  alpine 
  regions 
  without 
  chang- 
  

   ing 
  its 
  usual 
  habit 
  to 
  any 
  considerable 
  extent, 
  at 
  least 
  not 
  

   acquiring 
  any 
  of 
  the 
  peculiarities 
  possessed 
  by 
  the 
  former. 
  As 
  

   regards 
  C. 
  oreocharis, 
  this 
  cannot 
  represent 
  a 
  variety 
  either, 
  

   inasmuch 
  as 
  it 
  shows 
  relationship 
  to 
  the 
  " 
  Mo?itanw 
  " 
  and 
  may 
  

   together 
  with 
  C. 
  scirpoidea 
  Michx. 
  he 
  counted 
  among 
  the 
  

   " 
  forinas 
  hebetate 
  " 
  of 
  this 
  subsection. 
  

  

  Brookland, 
  D. 
  C, 
  January, 
  1900. 
  

  

  