ry J Beak of perigynium little ciliolate-serrulate or smooth; a 
/$ both surfaces of body veined * 
bi /( Beak about .5 mm. long, erect, rather abrupt; spikes - 
| Z2vabout 3-3.5 mm. in diameter 24.C. brunnescenss. 
4 /{ Beak about 1 mm. long, lightly recurved; spikes about 5 
la. » omme in diameter +5C. laeviculmis 
ji Beak of perigynium distinctly ciliolate-serrulate; flat 
/$ face of body veinless 
j( Beak of perigynium bluntly bidentate, 1/4-1/3 the 
2 p¢ Length of the body, the ventral false suture wanting or 
\inconspicuous; scales obtuse _ 2C.Ce interior 
\ 
/ Beak of perigynium sharply bidentate, the ventral false : 
Zo suture conspicuous; scales mostly acute 2. Ge angustior 
f) fb. Lateral spikes matly 1.53.5 om. long, rarely as short as 1 om.; 
»/perigynia abruptly beaked with a mimte smooth beak .2-.3 mm. long; ; 
\sceales purple toy 
AP re st arnline oe 
serlion 
§ Flowering culms of current year arising frax the center of the 
2 previous year's tuft of leaves hence surrounded at the base by the 
Pe /~\ dried remnants of the leaves of the previous year. 
e fo Plants strongly stoloniferois, the culms hence arising solitary or 
; , / few together; lowermost bract of the inflorescence normally mech 
‘ i shovter than the inflorescence 
{ (¥ Leaf-blades 2.5-5 mm. broad; culms acutely engled but nor margined; 
Ib — bladeless sheaths at the base of the culm (usually purple, 
firm and scalelike) mostly 1-4 om. long; culms 1-1.5 mm. thick 
pf Scales narrowly ovate, acute, firm 29. C. miserabilis 
4 Seales ovate, obtuse or abruptly mucronate, their margins 
| /f thin, often hyaline 30.Ce gymnoclada 
/> Leaf-blades 4-6 mm. broad; culms acutely angled, each angle 
/ bordered with a narrow margin .2 mm. wide; lower bladeless 
/ \ sheaths at the base of the culm 1.5-10 om. long, praninent; 
leas 1.5-2 mm. thick 3/. Ge prionophylla 
——— 
/¢) Plants more or less densely tufted; lowermost bract of the 
My inflorescence equalling or exceeding it 
i+’ Perigynia veinless 
i! Leaf-blades 2-3 mm. wide 32.0.5 aperta 
q if Leaf-blades mostly 6-8 mn. wide 3. Ce sitchensis 
)v Perigynia with 5-5 veins on one face, usually about 5-7 (3) 
on the other 
