SEDGE FAMILY. 



=** Perigynia beakless or very short-beaked (see no 36), and with orift 

 in texture, not Inflated, closely investing the achene pistil 



drooping, often brown or purple , stigmas often i. No, ^ 

 \ Pistillate spikes erect or somewhat spreading ( drooping when mature in no! *$ No. 44^ 



-Terminal spike staminate below, pistillate above (rarely all t*n 



ATRATAK. 



Scales shorter than or equalling the perigynia; arctic and alpine nwcW 

 Onfice of the pengymuin minutely 2-toothed; scale* obttuw of 't 

 Pistillate spikes 2"~5" long, erect. 

 Pistillate spikes 4"-i 2 " long, drooping when old. 

 Onfice of the perigymum entire; scales acute or awncd 

 Perigynium ovate, the style usually protruding 

 Perigynium obovate, the style not protruding 



Seales manifestly longer than the perigynia: lx>g specie* jfc / fmtt 



Terminal spike staminate throughout (occasionally pistillate at the too in a 



rarely 3 in No. 55. RIOIDAK. 



Lower sheaths becoming very fihrillose; tufted bog specie* 

 Lower sheaths not at all fibrillose, or slightly >,, 



Scales shorter than or equalling the peri'gynia <,,r lnn K i r m n.. 50) 

 Culms i-2^ tall; scales acute or acumi:i 



Pistillate spikes linear-cylindric. ^ , 



Pistillate spikes oblong-cylmdnc. 

 Culms 8' -4 tall; scales obtuse or the lower acute 

 vScales green. 



Leaves 2" -3" wide; pistillate spikes 3"-y," thick; perigynia nerrrlrw 



,, ., 

 Leaves i wide; pistillate spikes \" -i" thick; perigynia fan: 



&J- ' 



Scales purple or brown. 



Scales shorter than the perigynia; marsh and meadow pc 



if C. Got**. 



Scales equalling or longer than the perigynia; arctic and alpine j- 



Culms only i -7 tall; arctic species. 56. *. iMfri//A<f. M 



Scales distinctly longer than the perigynia; northern salt manth specie* 



Basal leavesi" wideorless; scales little longer than the pt-rigyni.i :.'> 



Basal leaves i"~3" wide; scales much longer than the perigynia. y- it* 



It Pistillate spikes drooping, mostly on slender or filiform stalks (erect in no*.66an 



Culms slender; pistillate spikes y t '-2 l A' long; stigmas 3 ( 2 in no. 59). 



Pistillate spikes linear; scales shorter than the pengynia. I'H \MS \i 



Perigynia twisted toward the top; scales purple-brown. %p. C. tori*. 



Perigynia straight; scales green. 60. C. firmum 



Pistillate spikes oblong, globose or cylindric: scales equalling the pcriffynia oc loacrr 

 Bracts manifestly sheathing; arctic species. FKKRI-'.: - : .\i 6l. C. *in 



Bracts sheathless; scales mostly dark. PENDTI 



Pistillate spikes narrowly cylindric; southern coast specie*. 6. < 



Pistillate spikes oblong or globose; northern species. 

 Scales not longer than the perigynia. 



Pistillate spikes 3"-6" long, few-flowered; scales obtuse 6 <torm. 



Pistillate spikes V'-io" long, several-flowered; scales acute 



Scales distinctly longer than the perigynia. 

 Perigynia oval or suborbicular. 

 Perigynia elliptic-lanceolate. 

 Culms tall, usually stout; pistillate spikes i'-4' long; scales 1-8 time* a* lone a* the pciicjMM. 



stigmas 2 (or 3 in nos. 70 and 71 ). CRYPTOCAKP \i 

 Perigynia smooth. 



Scales purple-brown; arctic species. 

 Scales green; plants not arctic. 



Perigynia nerveless or faintly nerved, much shorter than the 

 Perigynia nearly orbicular, biconvex. 

 Perigynia obovoid, obtuse. 

 Perigynia oblong or elliptic, acute. 



Perigynia strongly several-nerved, about equalling the scales 

 Perigynia granular or papillose. 



*** Perigynia tapering to a distinct beak (nearly or quite bekless in no* n 77). < 

 texture (firm in no. 88), inflated or loosely investing the achefi*; ptW 



mostly drooping, often narrowly linear. No. 7J-$. 

 t Terminal spike staminate below, pistillate above; beak of the perigynium abort of mmr 



73-Si- 

 J Spikes all erect or nearly so. ViRKSCKXTM. 



Perigynium densely pubescent. 



Pistillate spikes oblong-cylindric, 4"-io" long; pengynu 



Pistillate spikes narrowly cylindric, 6"-i8" long: perigynia oblon, 



IVrigvnium nearly glabrous, at least when mature. 



Spikes aH"-3j' thick; perigynia imbricated, flattened; 



Spikes 2" thick; perigynia not imbricated, swollen; top of the achen* br 



bent style. 







'9 



