Sec. 2. CERATOSCHOENUS. _Spikelets lanceolate, acuminate, in fruit

flattish, cymose-panicled, of only one perfect and 1--4 staminate

flowers; scales few; bristles rigid, minutely scabrous upward; style

simple or barely 2-toothed, filiform and gradually thickened downward,

in fruit persistent as an exserted, slender-awl-shaped, upwardly

roughened beak, several times longer than the smooth flat obovate

achene; coarse perennials; spikelets in flower 4'', in fruit including

the projecting beak about 1' long._

13. R. corniculata, Gray. (HORNED RUSH.) Culm 3--6 deg. high; leaves about

6'' wide; _cymes decompound, diffuse; bristles awl-shaped_, stout,

unequal, _shorter than the achene._--Wet places, Penn. to Fla., west to

S. Ind. and Mo.

14. R. macrostachya, Torr. (Pl. 4, fig. 1--4.) _Cymes_ decompound, or in

the northern form _somewhat simple_ and smaller, and the spikelets

usually more clustered; _bristles capillary, twice the length of the

achene_.--Borders of ponds, Mass. to N. J. and Fla.; rare.

14. CLADIUM, P. Browne. TWIG-RUSH. (Pl. 5.)

Spikelets ovoid or oblong, of several loosely imbricated scales; the

lower empty, one or two above bearing a staminate or imperfect flower;

the terminal flower perfect and fertile. Perianth none. Stamens 2. Style

2--3-cleft, deciduous. Achene ovoid or globular, somewhat corky at the

summit, or pointed, without any tubercle, in which it differs from

Rhynchospora. (Diminutive of [Greek: kla/dos], _a branch_, from the

repeatedly branched cyme of the original species.)

1. C. mariscoides, Torr. Perennial; culm obscurely triangular (1--2 deg.

high); leaves narrow, channelled, scarcely rough-margined; cymes small;

the spikelets clustered in heads 3--8 together on 2--4 peduncles; style

3-cleft.--Bogs, N. Scotia to Del., west to S. Minn. and Iowa. July.

15. SCLERIA, Berg. NUT-RUSH. (Pl. 5.)

Flowers monoecious; the fertile spikelets 1-flowered, usually intermixed

with clusters of few-flowered staminate spikelets. Scales loosely

imbricated, the lower empty. Stamens 1--3. Style 3-cleft. Achene

globular, stony, bony, or enamel-like in texture. Bristles, etc., none.

Perennials, with triangular leafy culms, mostly from creeping

rootstocks; flowering in summer; all in low ground or swamps.

Inflorescence, in our species, of terminal and axillary clusters, the

lower clusters usually peduncled. (Name, [Greek: skleri/a], _hardness_,

from the indurated fruit.)

[*] _Achene smooth._

1. S. triglomerata, Michx. _Culm_ (11/2--3 deg. high) _and broadly linear

leaves roughish_; fascicles of spikelets few, the lowest peduncled, the

upper _somewhat in threes; achene ovate-globose_ or depressed, on an

obscure crustaceous disk.--Mass. and Vt. to Fla., west to Minn. and

Tex.--Var. GRACILIS, Britton. Culms slender (1--2 deg. long); fascicles

few-flowered, the lower (2--3-flowered) on very long filiform peduncles;

achene not more than half as large, acutish.--N. J.

2. S. oligantha, Ell. Culms slender, 2 deg. high, the angles somewhat

winged; _leaves linear_ (2'' wide), _smooth_ except the scabrous apex;

lateral fascicles 1 or 2, usually on long exserted peduncles; _achene

ovate, on a tuberculate disk_.--Va. to Fla. and Tex.

[*][*] _Achene papillose or warty._

3. S. pauciflora, Muhl. Smoothish or hairy; culm slender (9--24' high);

leaves narrowly linear; fascicles few-flowered, the lateral pedunculate,

sessile, or wanting; bracts ciliate; achene globose-ovate; the disk a

narrow ring bearing 3 pairs of minute tubercles.--N. H. to Ohio, south

to Fla. and Tex.

[*][*][*] _Achene reticulated or wrinkled._

4. S. reticularis, Michx. (Pl. 5, fig. 6--10.) Culms slender, _erect_,

scabrous (1--21/2 deg. high); leaves linear (1--11/2'' wide), smooth; lateral

fascicles 1--3, loose, remote, nearly erect, _on short often included

peduncles_; bracts glabrous; achene globose, _regularly reticulated and

pitted_, not hairy, resting upon a double greenish conspicuously 3-lobed

disk, the inner appressed to and deciduous with the achene.--E. Mass. to

Fla.--Var. PUBESCENS, Britton. Edges of reticulations more or less

hairy, especially toward the apex; lateral fascicles generally on longer

peduncles. Pine-barrens of N. J. to Fla.--Var. OBSCURA, Britton. Achene

bony, its surface with very obscure reticulations, nearly smooth at the

summit. R. I. and N. C.

5. S. Torreyana, Walpers. Culms weak, _diffuse_, slightly scabrous or

smooth; leaves linear (2--4'' wide), smooth; lateral fascicles loose, on

_more or less elongated and drooping filiform peduncles_; achene

_irregularly pitted-reticulated or pitted-rugose with the ridges

somewhat spirally arranged and more or less hairy_ (sometimes smooth);

otherwise as in the last. (S. laxa, _Torr._)--Pine-barrens, N. J. to

Fla. and Tex.

6. S. verticillata, Muhl. Smooth; culms simple, slender (4--24' high);

leaves narrowly linear, _fascicles_ 3--9-flowered, 4--6, _sessile in an

interrupted spikelet; achene_ globose (1/2'' broad), somewhat triangular

at base, _rough-wrinkled with short elevated ridges; disk obsolete_.--E.

Mass. to Ont., Minn., and south to the Gulf.

16. CAREX, Ruppius. SEDGE. (By L. H. BAILEY.)

Flowers unisexual, destitute of floral envelopes, disposed in spikes;

the staminate consisting of three stamens, in the axil of a bract, or

_scale_; the pistillate comprising a single pistil with a bifid or

trifid style, forming in fruit a hard lenticular or triangular achene,

which is enclosed in a sac (_perigynium_) formed by the complete union

of the borders of a bractlet or of connate bractlets and borne in the

axil of a bract, or _scale_. Staminate and pistillate flowers borne in

different parts of the spike (spike _androgynous_), or in separate

spikes on the same culm, or rarely the plant dioecious.--Perennial

grass-like herbs with mostly triangular culms, 3-ranked leaves, usually

with rough margins and keel, and spikes in the axils of leafy or

scale-like bracts, often aggregated into heads. An exceedingly critical

genus, the study of which should be attempted only with complete and

fully mature specimens. (The classical Latin name, of obscure

signification; derived by some from [Greek: kei/ro], _to cut_, on

account of the sharp leaves--as the English name _Shear-grass_.) (Pl. 5

and 6.)

Synopsis of Sections and Groups.

Sec. 1. CAREX proper. Staminate flowers forming one or more terminal linear

or club-shaped spikes (often pistillate at base or apex). Pistillate

flowers usually in distinct and simple mostly peduncled spikes.

Cross-section of perigynium circular, obtusely angled, or prominently

triangular in outline. Style mostly 3-parted and achene triangular or

triquetrous.

[*] 1. Physocarpae. Perigynium mostly straw-colored at maturity, papery

in texture, usually more or less inflated, smooth (sometimes hairy in

n. 6), nerved, tapering into a beak as long as or longer than the body;

spikes few to many, distinct, compactly flowered; stigmas 3 (2 in

n. 10).

[+] 1. _Pauciflorae._ Perigynium greenish, linear-lanceolate or almost

needle shaped, not inflated, strongly deflexed at maturity, several

times longer than the inconspicuous scale; spike androgynous, the

pistillate flowers at base, few.--Sp. 1.

[+] 2. _Lupulinae._ Perigynium green or greenish tawny or sometimes

yellow, more or less inflated (except in n. 2--4) long, usually very

turgid at base, mostly erect or nearly so, very gradually attenuate to a

long slenderly toothed beak exceeding the scale; spikes 3 or more, the

staminate mostly 1 and stalked, the pistillate often sessile, usually

short and thick, often becoming dark colored in drying.--Sp. 2--8.

[+] 3. _Vesicariae._ Perigynium smooth and shining, much inflated, at

maturity straw-colored or sometimes purple, beaked and conspicuously

short toothed (entire in n. 10), usually prominently few nerved, much

shorter than in [+] 2; staminate spikes commonly 2 or more; pistillate

spikes as a rule long and densely cylindrical.--Sp. 9--16.

[+] 4. _Pseudocyperae._ Perigynium less inflated, more conspicuously

nerved or even costate, and with more or less setaceous or awned teeth;

scale usually awned; spikes mostly nodding or spreading, comose in

appearance, greenish, greenish-yellow, or ochroleucous.--Sp. 17--19.

[+] 5. _Squarrosae._ Perigynium obconic or obovoid, squarrose in

exceedingly dense short spikes.--Sp. 20, 21.

[*] 2. Trachychlaenae. Perigynium mostly thick and hard in texture, often

scabrous or hirsute, straight-beaked; pistillate spikes compactly

flowered, mostly large, erect or nearly so; staminate spikes 1 or more;

stigmas 3. Generally large and coarse.

[+] 1. _Shortianae._ Terminal spike androgynous, staminate below;

perigynium small, scabrous, nearly beakless, entire.--Sp. 22.

[+] 2. _Anomalae._ Terminal spike all staminate; pistillate spikes long

and cylindrical, mostly dense; perigynium broad and short, short-beaked,

the orifice very slightly notched or entire, mostly granulate.--Sp. 23.

[+] 3. _Hirtae._ A heterogeneous group, distinguished from [+] 2 by the

longer and more deeply cut beak (slightly toothed in n. 24), and by the

hairy perigynium (smooth in n. 25)--Sp. 24--27.

[+] 4. _Paludosae._ Staminate spikes 2 or more, long stalked; the

pistillate 2--several, usually all peduncled, long and heavy,

loose-flowered, erect or nodding; perigynium large, thick in texture,

strongly nerved, mostly smooth, usually conspicuously beaked. Coarse

species.--Sp. 28, 29.

[*] 3. Microrhynchae. Parallel with [*] 2; distinguished in general by

the much smaller and nearly or entirely beakless and mostly

entire-mouthed perigynium, which is much thinner in texture; stigmas 2

or 3. Paludose and alpine species, of various habit, mostly with colored

spikes, often in dense tufts or tussocks.

[+] 1. _Atratae._ Terminal spike club-shaped and androgynous with the

staminate flowers below (very rarely all staminate in n. 32); pistillate

spikes mostly short and dark-colored, erect or drooping; stigmas 3.--Sp.

30--32.

[+] 2. _Rigidae._ Mostly stiff, with short erect closely flowered spikes,

an entirely staminate terminal spike, dark colored scales, and bracts

with purple or black auricles at base; stigmas 2 or 3.--Sp. 33.

[+] 3. _Acutae._ Mostly larger and more slender, usually paludose, with

green or light-colored large and long spikes; stigmas 2 (3 in n. 39).

Distinguished from [+] 2 mainly by habit.--Sp. 34--39.

[+] 4. _Cryptocarpae._ Large, with nodding or drooping large spikes,

their dark scales very long and conspicuous; stigmas 2.--Sp. 40, 41.

[+] 5. _Pendulinae._ Distinguished from [+] 4 by the smaller size,

smaller spikes, sheathless bracts, and whitish, more or less granulated,

nearly pointless perigynium; stigmas 3.--Sp. 42--45.

[*] 4. Hymenochlaenae. Perigynium mostly light green or whitish, usually

thin and membranous, often somewhat inflated or loosely investing the

achene, commonly smooth and shining (hairy in n. 46, sometimes in

n. 47), slender or oblong, attenuate to a distinct or long minutely

toothed straight beak (or beakless or nearly so in [+] 1 and n. 55);

pistillate spikes several or many, mostly loosely flowered and on

filiform nodding or widely spreading peduncles; bracts leaf-like;

terminal spike staminate or androgynous; stigmas 3. Mostly rather tall

and slender upland species.

[+] 1. _Virescentes._ Terminal spike pistillate at top; pistillate

spikes oblong or cylindrical, dense, erect; perigynium ovate or obovate,

nearly or quite beakless, often hairy.--Sp. 46, 47.

[+] 2. _Sylvaticae._ Terminal spike all staminate; pistillate spikes

mostly long-exserted, slender; perigynium few-nerved, contracted into a

cylindrical beak which is longer than the body.--Sp. 48.

[+] 3. _Flexiles._ Terminal spike all staminate; pistillate spikes

rather thick (very small in n. 50), more or less drooping; perigynium

beaked, few-nerved or nerveless, tawny or whitish.--Sp. 49, 50.

[+] 4. _Debiles._ Terminal spike all staminate (occasionally pistillate

above in n. 53); pistillate spikes very narrow and slender,

long-exserted and nodding, mostly very loosely flowered; perigynium

rather small, not turgid, prominently beaked.--Sp. 51--53.

[+] 5. _Gracillimae._ Terminal spike pistillate at top; pistillate spikes

habitually thicker than in [+] 4; perigynium ovate-oblong, more or less

turgid; the beak short or none.--Sp. 54--57.

[+] 6. _Griseae._ Terminal spike staminate; perigynium more or less

turgid or plump, often glaucous, scarcely beaked, finely striate; spikes

erect.--Sp. 58, 59.

[*] 5. Spirostachyae. Perigynium smooth or minutely granulated or rarely

somewhat serrate on the margins, prominently nerved, mostly yellowish,

squarrose, mostly beaked (entirely beakless in n. 63), the orifice

entire; staminate spike mostly single; pistillate spikes 2--5, short

(usually 1' long or less), yellow or fuscous, compactly flowered;

stigmas 3.--Medium-sized species, growing in meadows and grassy swales.

[+] 1. _Granulares._ Spikes scattered, cylindrical, the lowest

long-stalked; bracts erect, long and leafy; sheaths short or nearly

obsolete.--Sp. 60, 61.

[+] 2. _Extensae._ Spikes mostly approximate or aggregated at the top of

the culm (becoming remote in C. extensa), the lowest 1 or 2 subtended by

a long and leafy mostly abruptly spreading and nearly or entirely

sheathless bract. Terminal spike sometimes androgynous.--Sp. 62.

[+] 3. _Pallescentes._ Spikes globular or short-oblong, obtuse, sessile

or short-peduncled, approximate at the top of the culm; bracts short,

leaf-like, sheathless; perigynium entire at the orifice, the beak none

or very short and stout.--Sp. 63, 64.

[*] 6. Dactylostachyae. Perigynium mostly short and triangular, mostly

with a short and straight or curved beak, green or greenish, scarcely

inflated; scales of the pistillate spikes mostly whitish (sometimes

dark-colored in the _Digitatae_), often small; staminate spike mostly

one; pistillate spikes short (seldom exceeding 1'), commonly rather

loosely flowered and slender (spike single and plant dioecious in n.

83); bracts sheathing, the sheaths often conspicuous and colored.--Low

and lax or slender species inhabiting meadows and copses.

[+] 1. _Oligocarpae._ Slender and narrow-leaved, with leafy bracts and

inconspicuous green sheaths; perigynium rounded on the angles, finely

many-striate, often somewhat punctulate as in n. 58, to which the group

forms a transition.--Sp. 65--67.

[+] 2. _Laxiflorae._ Slender and more or less broad-leaved, with mostly

leafy bracts, green or purple sheaths, and loosely flowered spikes;

perigynium mostly conspicuously three-angled, with a more or less curved

beak.--Sp. 68--74.

[+] 3. _Paniceae._ Mostly stouter and narrow-leaved, with thinner spikes;

perigynium often strongly nerved, not conspicuously triangular, often

somewhat turgid; bracts and sheaths various.--Sp. 75--78.

[+] 4. _Bicolores._ Small species with a beakless, more or less round or

pyriform perigynium, which is commonly glaucous; terminal spike

androgynous or all staminate; stigmas mostly 2.--Sp. 79.

[+] 5. _Digitatae._ Low species; sheaths membranaceous or hyaline and

colored, either not prolonged into a bract or the bract very short and

not foliaceous; perigynium more or less three-angled, often hairy, the

beak straight or nearly so.--Sp. 80--83.

[*] 7. Sphaeridiophorae. Perigynium mostly short and rounded, three-angled

in the _Triquetrae_, firm or hard in texture, not inflated, hairy or

scabrous, the beak straight and usually bifid; staminate spike one;

pistillate spikes short (1' long or less), usually globular or

short-oblong, more or less sessile and approximate or the longer ones

radical (spike single in n. 84); bracts sheathless, short, or obsolete;

stigmas rarely two.--Low species of dry ground, with leaves all radical.

[+] 1. _Scirpinae._ Spike one, unisexual; plant dioecious.--Sp. 84.

[+] 2. _Montanae._ Spikes two to several, the lowest occasionally

long-peduncled and radical; perigynium rounded, contracted above and

below, mostly bearing two prominent ribs, more or less hairy.--Low

species of dry soils.--Sp. 85--91.

[+] 3. _Triquetrae._ Taller; spikes mostly approximate at the top of the

culm, oblong or cylindrical; perigynium conspicuously 3-angled.--Sp. 92.

[*] 8. Phyllostachyae. Perigynium much as in the _Montanae_; spike one,

staminate above; pistillate flowers few, often remote, usually on a more

or less zigzag rhachis; scales prolonged and leaf-like.--Sp. 93--95.

[*] 9. Leptocephalae. Perigynium thin in texture, green, oblong or

lanceolate or linear in general outline, beakless; spike one, staminate

above, thin and slender; stigmas mostly three.--Small, slender and

grass-like.--Sp. 96.

[*] 10. Physocephalae. Spike one, globular or short-oblong, staminate at

the apex; perigynium straw-colored, paper-like, more or less inflated;

stigmas three. Leaves remarkably broad in our species.--Sp. 97.

Sec. 2. VIGNEA. Staminate flowers few and inconspicuous, borne at the base

or apex of the pistillate spikes. Pistillate flowers in short sessile

spikes (or spike single in some cases), which are commonly more or less

aggregated into heads or even panicled. Perigynium plano-convex. Styles

two and achene lenticular.--The spikes, especially the uppermost,

usually have contracted bases when the staminate flowers are borne below

the pistillate ones, and empty scales at the top when the staminate

flowers are borne at the summit.

[*] 11. Acroarrhenae. Staminate flowers borne at the top of the spikes

(or, in the _Multiflorae_ and _Arenariae_, spikes often wholly staminate

and the plants occasionally dioecious).

[+] 1. _Foetidae._ Spikes tawny or brown, not elongated, very densely

aggregated into a continuous globose somewhat chaffy head; perigynium

ovate or ovate-lanceolate, nerveless or nearly so, mostly thin in

texture.--Sp. 98, 99.

[+] 2. _Vulpinae._ Spikes mostly yellow or tawny when mature, densely

aggregated or sometimes somewhat scattered below or even panicled;

perigynium thick in texture, spongy at base, mostly stipitate, bearing

very conspicuous nerves, which converge below and are especially

prominent on the outer side.--Sp. 100--102.

[+] 3. _Multiflorae._ Heads various, mostly loosely flowered, sometimes a

panicle, yellow or tawny; spikes short (rarely longer than broad),

staminate flowers sometimes occupying whole spikes in the middle or at

the apex of the head; perigynium mostly small and short and nearly

nerveless, or in some species becoming nearly lanceolate and more or

less prominently nerved, firm in texture, usually numerous.--Sp.

103--108.

[+] 4. _Arenariae._ Spikes longer than in the last section, linear or

nearly so, aggregated into short, almost globose heads; perigynium

lanceolate or ovate-lanceolate, mostly larger and more delicate in

texture; scales awn-pointed or very acute. Staminate flowers variously

situated.--(C. arenaria.)

[+] 5. _Muhlenbergianae._ Spikes green or nearly so when mature,

aggregated or scattered, never in compound heads; perigynium mostly

short-ovate, staminate flowers always at the top of the spike.--Sp.

109--114.

[+] 6. _Dioicae._ Spike commonly one, small; plants small and slender,

often dioecious.--Sp. 115--117.

[*] 12. Hyparrhenae. Staminate flowers borne at the base of the spikes

(or in n. 124 and 125 variously situated).

[+] 1. _Elongatae._ Spikes silvery green or sometimes tawny when mature,

distinct, mostly small; perigynium not wing-margined nor conspicuously

broadened, mostly nearly flat on the inner surface.--Sp. 118--124.

[+] 2. _Ovales._ Spikes tawny or dark, rather large, sometimes crowded;

perigynium with a more or less thin or winged margin, which is mostly

incurved at maturity, rendering the perigynium concave inside.--Sp.

125--132.

[+] 3. _Cyperoideae._ Spikes green, oblong, densely crowded into a short

head subtended by two or three leafy bracts which are erect and

prolonged from six inches to a foot; perigynium linear-lanceolate,

scarcely margined.--Sp. 133.

Artificial Key.

Spike 1, staminate at top; scales of pistillate flowers leaf-like

Sp. 93-95

Spike 1, scales not leaf-like.

Usually dioecious, stigma 2 115-117

Stigmas 3.--

Perigynium densely hairy 84

Spike staminate at base; perigynia squarrose 21

Spike staminate at top.--

Globose; leaves broad 97

Perigynium nearly linear, beakless 96

Perigynium long, spindle-shaped 1

Spikes several or numerous, sessile, spicate or capitate; stigmas 2.

All in a globose or ovoid uninterrupted head.

All staminate above.--

Usually green at maturity 112, 114

Usually yellow or tawny or brown 98, 99, 104, 105

All staminate below.--

Leafy-bracteate 133

Not leafy-bracteate.--

Green 118-120

Usually tawny or brown 125-132

Some or all of the spikes distinct or the head interrupted.

Staminate and pistillate flowers variously disposed, some of the

spikes often unisexual.

Head large and long 108, C. arenaria

Head short or linear 124, 125

Spikes staminate above 100-114

Spikes staminate below 118-133

Spikes usually more or less pedicelled, the wholly or partially

staminate spikes uppermost.

Terminal spike (rarely the 2 or 3 uppermost) staminate only at base.

Stigmas 2 34-38, 79

Stigmas 3; spikes erect,

Short and squarrose 20, 21

Not squarrose 22, 30, 32, 46, 47, 54, 79

Stigmas 3; spikes more or less drooping 31, 51-53, 55-57

Terminal spike or spikes staminate.

Stigmas 2.--

Spikes spreading or pendulous 34, 37, 40, 41

Spikes erect or nearly so 9-16, 34-41, 85-91, 79

Stigmas 3; spikes spreading or drooping.

Perigynium prominently 3-angled 68-74

Perigynium large, thin, much inflated 9-16

Perigynium firmer, not inflated.

Beakless 42-45

Beaked or prominently pointed.--

Teeth long, stiff and sharp 17-19

Teeth short and thin, or none 30, 31, 39, 48-53

Stigmas 3; spikes erect or ascending.

Perigynium hairy.--

Spikes very large, globose 6

Spikes very small, sessile or nearly so 81-83, 85-92

Spikes cylindrical, heavy 24-28

Perigynium granular-roughened 23

Perigynium smooth,

Thin and turgid, loosely enclosing the achene.--

Beakless 58, 59

Beaked 5-17

Firm in texture, not inflated,

Long-beaked, deeply toothed 2-4, 26, 28

Less prominently beaked, short-toothed, sharply 3-angled

69-74

Wholly beakless and pointless 58, 59, 63, 78, 79

Very small, black and shining; leaves capillary 80

Culm and leaves thinly pubescent 64

Perigynium more or less pointed or beaked.

Spikes spreading or drooping 51-53, 68-70, 75

Spikes erect 60-62, 65-68, 71-78

[*] 1. PHYSOCARPAE.--[+] 1. _Pauciflorae_.

1. C. pauciflora, Lightf. (Pl. 5, fig. 1--16.) Very slender but erect,

6--18' high; leaves very narrow, much shorter than the culm; staminate

and pistillate flowers 2--5; perigynium at maturity easily

detached.--Cold sphagnum swamps, New Eng. to N. Penn. and Minn.; local.

(Eu.)

[*] 1.--[+] 2. _Lupulinae_.

[++] _Teeth of the perigynium strongly reflexed._

2. C. subulata, Michx. Green, very slender but erect, 6'--2 deg. high;

leaves narrow, somewhat shorter than the culm; bracts leafy, sheathing;

pistillate spikes 2--4, scattered, 2--6-flowered; perigynium

deflexed.--Deep sphagnum swamps, R. I. to E. Penn., and southward; very

local.

[++][++] _Teeth erect or spreading._

[=] _Whole plant yellowish; perigynium little or not at all inflated._

3. C. Michauxiana, Boeckl. Slender but stiff and erect, 1--2 deg. high;

leaves narrow and firm, shorter than the culm; spikes 2--3, the lowest

usually remote and short-peduncled, the remainder aggregated and

sessile; staminate spike small, wholly sessile; perigynium not inflated,

erect or spreading, twice longer than the blunt scale. (C. rostrata,

_Michx._)--Bogs and lake-borders, mountains of N. H. and N. Y., and

westward to L. Superior; local.

The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee · 第 79 / 104 段