
 
		division.  The  stamens  are  variously  situated  in  each  of  these  
 2  divisions  ;  and  this  leads  to  some  natural subdivisions. 
 I.  Stigmas 2 ;  seed  or  nut  compressed,  ovate,  and  lenticular.  
 Torrey in  “ Mon.  Cyp.”  p.  387. 
 Group  1.  Spike  1,  often  dioecious. 
 1.  C.  exilis,  Dewey.  Often  has  stamens  at  the  base  of  the  
 spike  ;  a new species,  found by William Oakes,  Esq., in  a marsh  
 at Danvers,  and by Mr. M.  A. Curtis, afterwards, at Malden.  It  
 has  since  been found  in  several places  in  the  State  of New York. 
 No  other  species  of  this  group  is  found  in  this Commonwealth,  
 though  some  others  abound farther north. 
 Group  2.  Spikes  several,  often  dioecious. 
 2.  C.  sterilis, Willd.  In wet, marshy  places. 
 3.  C.  bromoides,  Schk.  Small bogs  in marshes. 
 4.  C.  siccata, D.  Sandy plains  near Westfield. 
 Group  3.  Spikes  several,  stamens  at the summit. 
 5.  C.  cephalophora, Muhl.  Fields  and  open woods. 
 6.  C.  muricata,  L.  A  European  species,  lately  discovered  
 by B.  D.  Greene,  Esq.,  near Boston. 
 7.  C.  cephaloidea,  D.  Fields  and  hedges  ;  differs  from  
 C.  muricata,  of which  it has  been  called  a variety,  and  very  distinct  
 from  C.  cephalophora,  of  which  it  is  made  a  variety  in  
 “  Mon.  Cyp.”  p.  389. 
 Spikelets  5 - 7 ,  aggregated into  a thick spike, the lower 2  often  
 a little  remote  ;  fruit ovate,  short-rostrate,  scabrous  on  the  upper  
 half,  2-toothed,  plano-convex  ;  scale  of  the  fruit  ovate  acutish,  
 short,  scarcely half  as  long as  the fruit;  stigmas 2  ;  spikelets with  
 stamens  at  the  upper  p a rt;  culm  acutely  3-sided,  leafy  towards  
 the  base,  of  a yellowish  color,  and  from  1 to 4  feet  high,  usually  
 about  2 fe e t;  June ;  hedges,  open woods,  or  fields. 
 Stem is  sometimes  decumbent  from  its weight;  grows  highest  
 in  hedges  ;  fruit  falls  off  early.  This  plant  was  placed  under  
 C.  muricata,  because  it was  nearer  that,  and  from  a  desire  not  
 to  multiply  species.  There  is  little  doubt  that  it  was  blended  
 with his  C.  cephalophora by Muhlenberg ;  but it cannot  belong  to  
 that  plant.  It  is  much  nearer  C.  sparganioides  in  spikelets  and 
 fruit,  but  differs  far  too  much.  It  seems  proper  to  give  it  due  
 rank among its kindred  species. 
 8.  C.  rosea,  Schk.  Moist fields. 
 var.  radiata,  D.  Moist woods  or shaded  places. 
 9.  C.  retrojlexa, Muhl.  Open, moist woods.  In  making these  
 two  distinct,  the  authority  is  Schk.  and Muhlenberg. 
 10.  C.  Muhlenbergii,  Schk.  In  dry fields  and  pastures. 
 11.  C.  sparganioides, Muhl.  Cultivated fields. 
 12.  C.  multiflora, Muhl.  Meadows  and moist pastures, 
 var.  microsperma,  D.  Do.  do. 
 This  is  C.  vulpinoidea, Mx. 
 13.  C.  stipata, Muhl.  Wet places ;  variable.  Much  resembles  
 C.  vulpina,  L .,  though  much  smaller  than  the  European  
 plant. 
 14-  C.  cetacea,  D.  Wet  meadows ;  between  the  last  two,  
 and  distinct from  both. 
 15.  C.  paniculata,  L.  In  pond holes ;  little branching. 
 16.  C.  teretiuscula,  L.  Do. 
 17.  C.  disperma, D.  Wet places  at  the  foot of  hills. 
 Group 4.  Spikes  several,  stamens  at the  base. 
 18.  C.  Deioeyana,  Schw.  Open  woods.  Found throughout  
 the Northern  States,  into Canada and  the  Frigid  Zone. 
 19.  C.  trisperma, D.  Small tufts  in wet,  shaded  places. 
 20.  C.  tellulata,  Schreb.  Wet fields. 
 21.  C.  scirpoides,  Schk.  Wet and marshy places. 
 22.  C.  curta,  Good.  Wet bogs. 
 23.  C.  scoparia,  Schk.  Dry and moist  situations. 
 24.  C.  lagopodioides,  Schk.  About wet places. 
 25.  C.  straminea,Willd.  Fields  and pastures, 
 var.  minor, D.  Do.  do. 
 26.  C.  tenera,  D.  Wet  fields.  Related  to  the  preceding,  
 but often  is  quite  different. 
 27.  C.  cristata,  Schw.  Moist fields. 
 28.  C.  mirabilis, D.  Hedges  and  fields,  dry. 
 29.  C.  festucacea,  Schk.  Cultivated  grounds.  Larger,  and  
 club-shaped spikes, and different fruit and  seeds  from the  two  preceding, 
  which  it resembles.