>KI'l I: I \\XIX. i Yl'l KA< K.I.. 



10. C. nonpar ia. Brotcn Sedge. 



Bpikes 6 10, somewhat clarat* when young, at lonfrth orate, approximate, 

 sometimes aggregated In a dense bead; perigynla narrow-lanceolal. 

 margined, lunger dun the lanceolate, acuminate glume. A oammon species In 

 low grounds and meadow*, with brownish or yellowish spikes when mature, 

 Calm 1-S ft. high. 



11. 0. lagopodioides. Hare's-foot Sedge. 



Spike* 816, approximate, at leofth orate; perlgynia orate-lanceolata, 

 nerred, margined, about twloe M long a* the oblong-orate, obtoalab glume. A 

 rerr common ipede* much reMmbllng the last, but distinguished by Ita more 

 numerous spikes, and broader and more unequal pertgynia and glume*. Culms 

 1 ft. high. It sometimes occurs with the spike* aggregated In a bead. 



12. C. festucacea. Nodding Sedge. 



Spikes 4 8, oborate and somewhat derate, alternate, upper approximate, 

 lower distinct ; pcrigynla orate, compressed, with a narrow margin, and a 

 abort, bifid beak, shorter than the orate-lanceolate glume. A common species 

 In fields. There are two principal forms. The first baa 6 3 roundish, approxi- 

 mate spikes, and a stool, rigid stem ; tbo other has 85 smaller spikes, which 

 are more or lefls distant. The stem la slender, flexnoos above, with the upper 

 spike frequently nodding. Culms 10' 20' high. 



13. C. straminca. Winged Sedge. 



Spikes 8 6, ronndlsh-orold, alternate, approximate; pcrigrnla roundish- 

 ovate, much compressed, broadly winged, with a short, abrupt, bind beak, 

 somewhat longer than the lanceolate glume. A common species In fields along 

 woods, dUtlngulshed by Its broad, broadly-winged perigynla. It rarlcs In size 

 and form. In the large specimens the spikes are somewhat flaccid, and the 

 broad wings of tbe perlgrnia often brownish on the edge, while In the smaller 

 forms tbe spikes are more rigid, and the wings of tbe perlgynla narrower. 

 Culms 8' 20' high. 



. Sttimene and pUtilt in entirely tepartit* tpitet on the tame plant. 



14. C. stnYtu. JUgid Sedge. 



Staminate spikes 1 3, cyllndrlc ; fertile 2 I, long-cylindrlc, usually bar- 

 ren above, sessile ; lower one often on a short peduncle ; bracts rarely longer 

 than tbe calm, aurlcled at base ; perlgynla oratc-acumlnate, or elliptical, nerve- 

 less, not beaked, entire or very slightly emarginate, usually shorter than the 

 narrower brownish scale*. A common species growing In tufts In wet grounds. 

 Conn S 8 ft, high, rough on tbe angles, leafy ; leares glaucous, rough on tbe 

 margin. 



15. C. crinita. Drooping Sedge. 



Culm acutely angled, rough, leafy below ; stamlnate spikes 18, loose, cy- 

 lindrical, often with a few perfect flowers Intermixed, on long peduncles ; fer- 

 tile spike* 8 <, cyllndrlc, long, densely flowered, on long, nodding, filiform 

 peduncles ; bracts long, leafy, much exceeding tbe culm ; perlgynla roundish, 

 tapering at base, somewhat Inflated, with a short, entire beak, smooth, much 

 shorter than tbe narrow-oblong, rough-awned glume. A common and variable 

 species, distinguished by Ma long, drooping, pedunculate spikes, and leafy 

 bracts. Meadows and ditches. Culms 8-8 ft. high. 



(1 Stigmata. 

 :te tlnglf, androgynotii. 



16. C. polytrichioides. Dwarf Sedge. 



Culms rery low, setaceous ; spike linear, stamlnate above; perlgynla few, 

 alternate, oblong, somewhat triangular, obtuse, smooth, emarglnate, twice as 

 long a* the orate, mostly obtuse glume. A rery slender species, common In 

 cold swamps and bogs. Culms V4> high. 



D. Splint ttttral ; terminal mi utamlnatt, pittittate abort. 



17. C. vireacens. Lighi-grecn Sedge. 



Spike* S 4, oblong; alternate, erect, on short peduncles; perlgynla pubes- 

 cent, not beaked, longer than the orate, pubescent, mncronate glume. A com- 

 mon species In woods and hlli-sldcs. Culm and foliage light green, pubescent 

 Plant IP-IP big). 



*18. C. Buxbarimii. Sea-green Sedge. 



Spike* 84. oblong or oborale, abort and thick, uppermost on a short pe- 

 duncle, UM rast almost smile, lower one* somewbat remote, bracteoUte; pe- 

 rigynla elliptic-oral.', somewhat 8-wgled, nerved, smoirth, entire at apex, 

 carrrljr equal to the orate, acuminate or mnrronatc glume A common spe- 



cles In wet grounds, distinguished by its short and thick spikes, smooth pertgy 

 nla, and light, glaucous- green (ullage. Culm lu'-iy high. 



19. C. gracillima. 



Graceful 5 



Spike* 8 o, long and slender, linear, somewhat loose, remote, on lone. Ali- 

 form, nodding peduncles, drooping at maturity ; bract* as long as the < 

 longer; perigynla oblong, 8-angted, obtuse, somewhat oblique at tbe orifice, 

 longer than tbe oblong, awned glume. A slender, graceful spedes, readily dis- 

 tinguished by It* slender, drooping spike* and pale green foliage. Cuba 10' 



W high. 



X Siaminate tpOu tingle, rery rarely pittiilate above. 



* fertile tpUtet tmall and tettile, or almett tettUe, or eUt radical ; on long 



20. C. Pennsylvanica. Vernal Sedge. 



Stamlnate spike long, on a short peduncle ; fertile spikes 1 3, sppr 

 orold, Seattle, few-flowered, much shorter than the stamlnate barrel. 

 lowest with colored, setaceous bracts ; perlgynla orate-^globose, pubescent with 

 a short, scarcely toothed beak about as long as tbe orate-acnmlnste, brownish- 

 red glume. An early species, common In the border of woods and on bill-sides. 

 Culms 4' 10' high. 



21. C. Norse Anglise. New England Sedge. 



Sterile splko pedunculate, short and slender; fertile spikes 24, ovate, 

 nearly sessile, alternate, more or less remote, few-flowered ; lowest with usually 

 a setaceous bract at baso ; perlgynla slightly stalked, somewhat pubescent, with 

 a comparatlrely long, bind beak, somewhat longer than tbe ovate, acumlnat 

 glume.' A slender species, growing In tufts, either erect or decumbent It 

 rarles with the fertile spikes more or less aggregated. Culms 4' 16' long. 



22. C. umbellata. Umbelled Scdi/r. 

 Stamlnate splko short, erect ; fertile spikes several, ovate ; uppermost He- 



slip, close to the sterile ; the rest solitary, on filiform, radical peduncles, equal- 

 ling the others In height, forming apparently a little umbel, tbo radical p.'.lnn- 

 clcs being concealed by the leaves ; perlgynla it-angled, pubescent, with a long 

 beak, equalling tbo ovate, acuminate scale. A small spedes, growing In tufts, 

 with long, glossy leaves, sufficiently distinguished by the filiform radical 

 peduncles. Culms 2' <C high. 



* Upper fertile itpUxt nearly or quite tettUe ; loteer often on long pedsw 

 clft ; all dentely Jtoicered, Ferigynia more or left inflated. 



23. C. flava. Yi-lluwHi'J,/<: 



Fertile spikes S 4, orold, densely flowered, upper approximate, lower re- 

 mote, on usually exsert peduncles ; bracts spreading, or somewbat reflexed, 

 longer than the culm ; perlgynla slightly Inflated, nerved, smooth, somewhat 

 3-angled, tapering to a long, curved, bifid beak, longer than the ovate-lanceolate 

 glume, reflexed at maturity. Culm 6' IS" high. 



24. C. tentaculata. Burr Sedge. 



Fertile spikes 28, orold-eyllndrlcal, densely flowered, approximate, npper 

 on* sessile, the others on short, more or leas exsert peduncles ; bract* leafy, 

 much longer than the culm ; perigynla much Inflated, spreading; smooth, with 

 a long, bind beak, twice longer than the lanceolate, awned glume. A common 

 species In wet grounds, where Its cylindrical, burr-like spikes of perlgynla are 

 rery conspicuous. Culm 10' 20' high. 



25. C. intumescena. Bladder-frit i 



l!arren spike pedunculate ; fertile spikes 18, few-flowered, cloarly approxi- 

 mate, sessile, the lowest on a rery short peduncle ; bracts lcaf\ 

 than the culm; perlgynla large, rery much Inflated, divergent 

 many-nerved at base, tapering to a long, 8 toothed beak, three limes as long as 

 the orate glume. Culm rigidly erect, leafy, with dark pwn Mlsga, IV Vf 

 high. A common species In low grounds and swamps di-iim-nHi.-.! by the 

 large. Inflated perlgynla, which, often \' long, are In roundish, 4 8-flowcred 

 clusters. 



26. C. folliculata. Tawny Sedge. 



Stamlnate spike small, short-pedunculate or swslle; fertile spikes 84, 

 rr distant, lowest on long, exserted peduncles; bracts leafy, much 

 longer than tbe culm, sheathing at base ; pcrigynlu much 



Inflated, large, with a long, 2-tooUied beak, somewhat longer than the orate, 

 whitish, awned glnine. A tall, leafy spedes with broad, flat leaves ; the cnbt 

 and foliage usually pale yellow, 24 ft high. Common In swamps. 



