Part 78

13. E. Torreyana, Boeckl. Like the preceding, but more capillary and heads smaller (11/2--2'' long), _sometimes proliferous_, the one or more short new culms from the axil of its lowest scale, which persists as an herbaceous bract; achene very much smaller, with sharper angles and a short conical tubercle, which is hardly equalled by the 3--6 slender bristles. (E. microcarpa, var. filiculmis, _Torr._)--Wet pine-barrens, N. J. to Fla.

(Addendum) 13^a. E. albida, Torr. Like n. 12 and 13 in habit, somewhat stouter; spikelet dense, ellipsoidal or oblong, 1--4'' long, acutish, with pale obtuse scales; achene very small, triangular-obovate, very smooth, with a broadly triangular tubercle upon a narrow base, shorter than or exceeding the reddish bristles.--Salt marshes, Northampton Co., Va. (_Canby_), and south to Fla. and Tex.

[+][+] _Bristles 2--4, shorter than the achene, slender and fragile, or none._

14. E. tenuis, Schultes. _Culms almost capillary, erect_ from running rootstocks, _4-angular_ and flattish (1 deg. high), the sides concave; _spikelet elliptical, acutish, 20--30-flowered_ (3'' long); _scales ovate, obtuse_, chestnut-purple with a broad scarious margin and green keel; _achene obovate, roughish-wrinkled, crowned with a small depressed tubercle_, persistent after the fall of the scales; bristles 1/2 as long as the achene or none.--N. Scotia to N. C., Minn., and Mo. June.

15. E. compressa, Sullivant. _Culms flat_, striate, tufted, erect (1--2 deg. high); _spikelet ovate-oblong_, or at length lanceolate, _20--30-flowered_ (4--7'' long); _scales lanceolate-ovate, acute_, dark purple with broad white pellucid margins and summit; _achene_ yellowish, _obovate-pear-shaped_, obtusely triangular, _wrinkled, crowned with a small conical_ and pointed _tubercle; bristles 1--4, very slender_, fragile, shorter than or equalling the achene (sometimes none or a single rudiment).--Wet places, N. Y. and Ont. to Minn. and Mo.

16. E. melanocarpa, Torr. _Culms flattened_, grooved, wiry, erect (9--18' high); _spikelet cylindrical-ovoid or oblong, thick_, obtuse, densely many-flowered (3--6'' long); scales closely many-ranked, roundish-ovate, very obtuse, brownish with broad scarious margins; _achene smooth, obovate-top-shaped, obtusely triangular, the broad summit entirely covered like a lid by the flat depressed tubercle_, which is raised in the centre into a short abrupt triangular point; bristles often obsolete; achene soon blackish.--Wet sand, Mass. to Fla.

17. E. tricostata, Torr. _Culms flattish_ (1--2 deg. high); _spikelet soon cylindrical_, densely many-flowered (6--9'' long), thickish; scales ovate, very obtuse, rusty brown, with broad scarious margins; _achene obovate, with 3 prominent thickened angles, minutely rough-wrinkled, crowned with a short-conical acute tubercle_; bristles none.--N. J. to Fla.

18. E. Wolfii, Gray. Culms slender (1 deg. high), from very small creeping rhizomes, _2-edged_; spikelet ovate-oblong, acute; scales ovate-oblong, obtuse, scarious, pale purple; achene pyriform, shining, _with 9 nearly equidistant obtuse ribs and transverse wrinkles between them; tubercle depressed, truncate_, more or less apiculate; bristles not seen.--Wet prairies, N. Iowa and S. Minn.

Sec. 4. _Spikelet more or less flattened, thicker than the slender or capillary culm, few--many-flowered; the thin membranaceous scales somewhat 2--3-ranked; style 3-cleft; bristles of the perianth 3--6, fragile or fugacious. Small or delicate species, differing from the last division chiefly in the flattish spikelets._

[*] _Tubercle contracted at its junction with the achene._

19. E. acicularis, R. Br. Culms finely capillary (2--8' long), _more or less 4-angular_; spikelet 3--9-flowered; scales ovate-oblong, rather obtuse (greenish with purple sides); achene obovate-oblong, _with 3-ribbed angles and 2--3 times as many smaller intermediate ribs_, also transversely striate, longer than the 3--4 very fugacious bristles; _tubercle conical-triangular_.--Muddy shores, across the continent. (Eu., Asia.)

20. E. pygmaea, Torr. Culms bristle like, flattened and grooved (1--2' high); spikelet ovate, 3--8-flowered; scales ovate (greenish), the upper rather acute; _achene ovoid, acutely triangular, smooth and shining, tipped with a minute tubercle_; bristles mostly longer than the fruit, sometimes wanting.--Brackish marshes, from N. Brunswick to Fla.

[*][*] _Tubercle continuous with the nutlet and not contracted at base._

21. E. pauciflora, Link. Culms striate-angled, very slender (3--9' high), scarcely tufted, on slender running rootstocks, with a short truncate sheath at base; scales of the ovate spikelet evidently 2-ranked, chestnut-brown, pointless, all flower-bearing, the two lower larger; bristles 3--6, about as long as the conspicuously beaked triangular achene. (Scirpus pauciflorus, _Lightfoot_.)--Wet places, N. Y. to N. Ill. and Minn., north and westward. (Eu., Asia.)

5. DICHROMENA, Richard. (Pl. 4.)

Spikelets aggregated in a terminal leafy-involucrate head, more or less compressed, few-flowered, all but 3 or 4 of the flowers usually imperfect or abortive. Scales imbricated somewhat in 2 ranks, more or less conduplicate or boat-shaped, keeled, white or whitish. Stamens 3. Style 2-cleft. Perianth, bristles, etc., none. Achene lenticular, wrinkled transversely, crowned with the persistent and broad tubercled base of the style.--Culms leafy, from creeping perennial rootstocks; the leaves of the involucre mostly white at the base (whence the name, from [Greek: di/s], _double_, and [Greek: chro~ma], _color_).

1. D. leucocephala, Michx. Culm triangular (1--2 deg. high); leaves narrow; those of the involucre 4--7; achene truncate, not margined.--Damp pine-barrens, N. J. to Fla. Aug., Sept.

2. D. latifolia, Baldwin. (Pl. 4, fig. 1--5.) Culm stouter, nearly terete; leaves broadly linear, those of the involucre 8 or 9, tapering from base to apex; achene round-obovate, faintly wrinkled, the tubercle decurrent on its edges.--Low pine-barrens, Va. to Fla.

6. PSILOCARYA, Torr. BALD-RUSH. (Pl. 4.)

Spikelets ovoid, terete, the numerous scales all alike and regularly imbricated, each with a perfect flower. Perianth (bristles) wholly wanting. Stamens mostly 2. Style 2-cleft, its base or the greater part of it enlarging and hardening to form the beak of the lenticular or tumid more or less wrinkled achene.--Annuals, with leafy culms, the spikelets in terminal and axillary cymes. (Name from [Greek: psilo/s], _naked_, and [Greek: kary/a], _nut_.)

1. P. scirpoides, Torr. Annual (4--10' high), leafy; leaves flat; spikelets 20--30-flowered; scales oblong-ovate, acute, chestnut-colored; achene somewhat margined, beaked with a sword-shaped almost wholly persistent style. (Rhynchospora scirpoides, _Gray_.)--Inundated places, S. N. Eng.

7. FIMBRISTYLIS, Vahl. (Pl. 3.)

Spikelets several--many-flowered, terete; scales all floriferous, regularly imbricated in several ranks. Perianth (bristles, etc.) none. Stamens 1--3. Style 2--3-cleft, often with a dilated or tumid base, which is deciduous (except in n. 4) from the apex of the naked lenticular or triangular achene. Otherwise as in Scirpus.--Culms leafy at base. Spikelets in our species umbelled, and the involucre 2--3-leaved. (Name compounded of _fimbria_, a fringe, and _stylus_, style, which is fringed with hairs in the genuine species.)

[*] _Style 2-cleft, flattened and ciliate; achene lenticular; tubercle soon deciduous; spikelets many-flowered._

1. F. spadicea, Vahl, var. castanea, Gray. Culms (1--2{1/2} deg. high) tufted from a _perennial root, rigid_, as are the _thread-form convolute-channelled leaves_, smooth; spikelets ovate-oblong becoming cylindrical, dark chestnut-color (2'' thick); _stamens 2 or 3; achene very minutely striate and reticulated_.--Salt marshes along the coast, N. Y. and N. J. to Fla. July--Sept.--Scales lighter colored than in the tropical form.

2. F. laxa, Vahl. (Pl. 3, fig. 1--5.) Culms slender (2--12' high) from an _annual root, weak_, grooved and flattish; _leaves linear, flat, ciliate-denticulate, glaucous_, sometimes hairy; spikelets ovate, acute (3'' long); _stamen 1; achene conspicuously 6--8-ribbed on each side, and with finer cross-lines_.--Low ground, Penn. to Fla., west to Ill. and La. July--Sept.

[*][*] _Style 3-cleft and achene triangular; tubercle soon deciduous; spikelets smaller and fewer-flowered._

3. F. autumnalis, Roem. & Schult. (Pl. 3, fig. 6--9.) Annual (3--16' high), in tufts; culms flat, slender, diffuse or erect; leaves flat, acute; umbel compound; spikelets oblong, acute (1--2'' long), single or 2--3 in a cluster; scales ovate-lanceolate, mucronate; stamens 1--3.--Low grounds, Maine to Fla., west to Ill. and La.

[*][*][*] _Style 3-cleft, filiform and not ciliate; achene acutely triangular; tubercle more or less persistent._

4. F. capillaris, Gray. Low annual, densely tufted (3--9' high); culm and leaves nearly capillary, the latter short; umbel compound or panicled; spikelets (2'' long) ovoid-oblong; stamens 2; achene minutely wrinkled, very obtuse.--Sandy fields, N. Eng. to Fla., west to Minn., Tex., and the Pacific.

F. VAHLII, Link (F. congesta, _Torr._), a diminutive southern species, with long filiform leaves, sessile capitate spikelets, narrow acuminate scales, and the style 2-cleft and not ciliate, has been found in ballast-sand along the northern coast.

8. SCIRPUS, Tourn. BULRUSH or CLUB-RUSH. (Pl. 3.)

Spikelets several--many-flowered, solitary or in a terminal cluster which is subtended by a 1--several-leaved involucre (this when simple often appearing like a continuation of the culm), terete, the scales being regularly imbricated all round in many or several ranks, or rarely somewhat compressed and the fewer scales inclining to be 2-ranked. Flowers to all the scales, or to all but one or two of the lowest, all perfect. Perianth of 3--6 mostly retrorsely barbed or ciliate bristles (not elongated), or sometimes wanting. Stamens mostly 3. Style 2--3-cleft, simple, not bulbous at base, wholly deciduous, or sometimes leaving a tip or point to the lenticular or triangular achene.--Culms sheathed at base; the sheaths usually leaf-bearing. Mostly perennials; flowering in summer. (The Latin name of the Bulrush.)

[*] _Spikelets solitary, few-flowered, small, often flattish; achene triangular, smooth._

[+] _Involucre a short awl-shaped bract; culms tufted (3--12' high), filiform._

1. S. caespitosus, L. _Culms terete_, wiry, densely sheathed at base, in compact turfy tufts; the upper sheath bearing a very _short awl-shaped leaf_; spikelet ovoid, rusty-color; involucral bract a rigid-pointed scale, resembling the lowest proper scale of the spikelet and scarcely surpassing it; _bristles 6, smooth_, longer than the abruptly short-pointed achene.--Coast of Maine, alpine summits of N. Eng., swamps of northern N. Y., N. Ill., Minn., and northward; also on Roan Mt., N. C. (Eu.)

2. S. Clintonii, Gray. _Culms acutely triangular_, almost bristle-like; sheaths at the base bearing a _very slender almost bristle-shaped leaf_ shorter (usually very much shorter) than the culm; involucral bract awl-shaped, mostly shorter than the chestnut-colored ovate spikelet, which has _pointless scales_; otherwise as the next.--Rather dry plains, N. Y. June.

3. S. planifolius, Muhl. _Culms triangular, leafy_ at base; _leaves linear, flat, as long as the culm_, and like it rough-edged; involucral bract a bristle-tipped scale usually overtopping the ovate or oblong chestnut-colored spikelet, the green midrib of the _scales extended into sharp points; bristles upwardly hairy_, as long as the pointless achene.--Dry or moist ground, N. Eng. to Del., west to western N. Y. and Penn.; W. Mo. (_B. F. Bush._).

[+][+] _One-leaved involucre more conspicuous, and as if continuing the culm._

4. S. subterminalis, Torr. Aquatic; culms (1--3 deg. long, thickish-filiform) partly and the shorter filiform leaves wholly submersed, cellular; the filiform green bract 6--12'' long, much surpassing the oblong spikelet; scales somewhat pointed; bristles 6, bearded downward, rather shorter than the abruptly-pointed achene.--Slow streams and ponds, N. Eng. to N. J., west to Mich. and N. Ind.--Var. TERRESTRIS, Paine; less tall, with firmer stem and leaves, and fruiting spike more turgid. Growing chiefly emersed; Herkimer Co., N. Y.

[*][*] _Spikelets clustered (rarely only one), appearing lateral, the one-leaved involucre resembling and seeming to be a continuation of the naked culm._

[+] _Culm sharply triangular, stout, chiefly from running rootstocks; spikelets many-flowered, rusty brown, closely sessile in one cluster; sheaths at base more or less leaf-bearing._

5. S. pungens, Vahl. Running rootstocks long and stout; _culm sharply 3-angled_ throughout (1--4 deg. high) with concave sides; _leaves 1--3, elongated_ (4--10' long), keeled and channelled; spikelets 1--6, capitate, ovoid, usually long, overtopped by the pointed involucral leaf; scales ovate, sparingly ciliate, 2-cleft at the apex and awn-pointed from between the acute lobes; _anthers tipped with an awl-shaped minutely fringed appendage; style 2-cleft_ (rarely 3-cleft); bristles 2--6, shorter than the obovate plano-convex and mucronate smooth achene.--Borders of salt and fresh ponds and streams, throughout N. Am. (Eu., S. Am.)

6. S. Torreyi, Olney. Rootstocks slender if any (so that the plant is readily pulled up from the mud); _culm 3-angled_, with concave sides, rather slender (2--4 deg. high), _leafy at base; leaves 2 or 3, more than half the length of the culm_, triangular-channelled, slender; _spikelets 1--4, oblong or spindle-shaped, acute, distinct_, pale chestnut-color, long overtopped by the slender erect involucral leaf; scales ovate, smooth, entire, barely mucronate; _style 3-cleft; bristles longer than the unequally triangular-obovate very smooth long-pointed achene_.--Borders of ponds, brackish and fresh, N. Eng. to Penn., Mich., and Minn.

7. S. Olneyi, Gray. _Culm 3-wing-angled, with deeply excavated sides_, stout (2--7 deg. high), the _upper sheath bearing a short triangular leaf or none_; spikelets 6--12, closely capitate, ovoid, obtuse, overtopped by the short involucral leaf; scales orbicular, smooth, the inconspicuous mucronate point shorter than the scarious apex; _anthers with a very short and blunt minutely bearded tip; style 2-cleft_; bristles 6, scarcely equalling the narrowly obovate plano-convex and mucronate achene.--Salt marshes, S. New Eng. to Fla., west to the Pacific.

S. MUCRONATUS, L. Resembling the last, 1--3 deg. high; spikelets numerous in a dense cluster, oblong-ovate, 6--8'' long or less; scales ovate, mucronate, firm, scarcely at all scarious; _style 3-cleft_; achene smaller, broadly obovate.--In a single locality in Delaware Co., Penn.; probably introduced from S. Europe.

[+][+] _Culm triangular, tall and stout, from slender running rootstocks; spikelets many-flowered, loosely umbellate or corymbed, involucellate-bracted._

8. S. Canbyi, Gray. Culm (3--5 deg. high) 3-angled, usually sharply so above, obtusely below, the sheath at base extended into a long slender triangular and channelled leaf (2--4 deg. long); involucral leaf similar (4--8' long), continuing the culm; spikelets oblong (4--6'' long), single or sometimes proliferously 2 or 3 together, nodding on the apex of the 5--9 long filiform and flattened peduncles or rays of the dichotomous umbel-like corymb, or the central one nearly sessile; scales loosely imbricated, oblong-ovate, acute, pale, thin and scarious, with a greenish nerved back; bristles 6, firm, furnished above with spreading hairs rather than barbs, equalling the slender abrupt beak of the obovate-triangular shining achene (11/2'' long).--In a pond near Salisbury, Md.

[+][+][+] _Culm terete, very tall and stout, from a deep running rootstock, leafless or very nearly so; spikelets numerous, clustered in a one-sided compound umbel-like panicle longer than the involucral leaf; involucellate bracts small, scale-like and rusty-scarious; scales of the spikelets rusty or chestnut-brown, scarious, the midrib extended into a mucronate point._

9. S. lacustris, L. (GREAT BULRUSH.) Culm 3--9 deg. high, 1/2--1' thick at base; spikelets ovate-oblong (3--4'' long); scales mostly a little downy on the back and ciliate; style 2-cleft; achene pale and dull, obovate with a narrowed base, plano-convex, mucronate-pointed, usually overtopped by the 4--6 slender downwardly barbed bristles. (S. validus, _Vahl._)--Common everywhere in still fresh water. (Eu., Asia, etc.)

[+][+][+][+] _Culms slender from an annual root, terete, plano-convex or obtusely triangular, naked; the sheaths rarely bearing a short leaf; spikelets few or several in a sessile cluster, sometimes solitary, much overtopped by the involucral leaf; bristles often few or wanting._

10. S. debilis, Pursh. (Pl. 3, fig. 1--5.) _Culms obtusely triangular_, with somewhat hollowed sides, 1--2 deg. high, yellowish-green, shining; spikelets 3--12, capitate, ovate-oblong, obtuse (3--4'' long), chestnut-brown; involucral leaf often horizontal at maturity; scales roundish; stamens 3; style 2--3-cleft; _bristles 6, stout_, downwardly barbed, equalling or two surpassing the obovate _turgidly plano-convex_ (or bluntly 3-sided) abruptly mucronate-pointed _smoothish_ achene.--Swamps, Mass. to S. C., Minn. and Neb. Aug., Sept.

11. S. Smithii, Gray. _Culms terete_, slender, 3--12' high, often leaf-bearing from the upper sheath, dull green as are the 1--3 oblong-ovate acute spikelets; involucral leaf always erect; scales oblong-oval; style 2-cleft; _bristles 1 or 2 minute rudiments or none_; achene _somewhat lenticular, smooth_, deciduous with the scales.--Wet shores, Delaware Bay to L. Ontario, Mich., N. Ind., and Ill. July.

12. S. supinus, L., var. Hallii, Gray. _Culms filiform_, 5--12' high; upper sheath rarely distinctly leaf-bearing; spikelets 1--7 in a sessile or sometimes geminately proliferous cluster, ovate-oblong becoming cylindrical, greenish; scales ovate, strongly keeled, mucronate-pointed; stamens 2 or 3; style 2-cleft; _bristles none; achene obovate-orbicular_, mucronate, plano-convex, _strongly wrinkled transversely_.--Wet shores, Ill. to Tex.; also found in E. Mass. (_Hitchings_). (Eu.)

[*][*][*] _Spikelets in simple or mostly compound umbellate or cymose-panicled clusters, many-flowered, terete; involucre of mostly several flat leaves; culm tall, from tufted or running rootstocks, triangular, leafy, sedge-like; leaves rough on the margin; style mostly 3-cleft._

[+] _Spikelets large (6--15'' long); midrib of the scales extended beyond the mostly lacerate or two-cleft apex into a distinct awn._

13. S. maritimus, L. (SEA CLUB-RUSH.) Leaves flat, linear, as long as the stout culm (1--3 deg. high), those of the involucre 1--4, very unequal; spikelets few--several in a sessile cluster, and often also with 1--4 unequal rays bearing 1--7 ovate or oblong-cylindrical (rusty-brown) spikelets; awns of the scales soon recurved; _achene obovate-orbicular, compressed, flat on one side, convex or obtuse-angled on the other, minutely pointed, shining, shorter than the_ 1--6 unequal and deciduous (sometimes obsolete) _bristles_.--Saline localities, on the coast from N. Scotia to Fla., and in the interior across the continent. (Eu.)--Var. MACROSTACHYOS, Michx.; larger, with very thick oblong-cylindrical heads (1--1{1/2}' long), and longer involucral leaf (often 1 deg. long).

14. S. fluviatilis, Gray. (RIVER C.) Culm very stout, 3--5 deg. high; leaves flat, broadly linear (1/2' wide or more), tapering gradually to a point, the upper and those of the very long involucre very much exceeding the _compound umbel; rays 5--9, elongated, recurved-spreading_, each bearing 1--5 ovate or oblong-cylindrical acute paler heads; scales less lacerate and awns less recurved; _achene obovate, sharply and exactly triangular, conspicuously pointed, opaque_, scarcely equalling the 6 rigid bristles.--Borders of lakes and large streams, W. Vt. to Conn. and Penn., west to Minn. and Iowa.

[+][+] _Spikelets very numerous, small (1--3'' long); scales mucronate-pointed or blunt; umbel-like cymose panicle irregular, compound or decompound; culm 2--5 deg. high, unusually leafy; leaves broadly linear, green and rather soft; bristles very slender, often more or less tortuous and naked below._

15. S. sylvaticus, L. _Spikelets lead-colored, clustered 3--10 together at the end of the mostly slender ultimate divisions_ of the open decompound panicle, ovoid or lance-ovate, 2'' long; scales bluntish; bristles 6, downwardly barbed throughout, rather exceeding the triangular short-pointed achene; style 3-cleft.--Along brooks, E. Mass. to N. Y.; rare.

Var. digynus, Boeckl. Style 2-cleft and the achene not at all angled on the back; stamens 2, and bristles 4. (S. microcarpus, _Presl._)--N. Scotia and N. Eng. to Minn., and westward.

16. S. atrovirens, Muhl. Leaves somewhat more rigid; _spikelets dull greenish-brown, densely conglomerate (10--30 together) into close heads_, these also usually densely clustered in a less compound panicle; scales pointed; _bristles_ sparsely and strongly _downwardly barbed above the middle, naked below_, nearly straight, as long as the conspicuously pointed and obovate-oblong triangular achene.--Wet meadows and bogs, N. Scotia and N. Eng., west to Minn., Kan., and the Pacific.

17. S. polyphyllus, Vahl. Culm usually more leafy; _spikelets yellow-brown, ovate_, becoming cylindrical, _clustered 3--8 together in small heads on_ the short ultimate divisions of the _open decompound umbel_; scales mucronate; _bristles 6, usually twice bent, soft-barbed toward the summit only_, about twice the length of the achene.--Swamps and borders of ponds, western N. Eng to N. C., west to Minn, and Ark.

9. ERIOPHORUM, L. COTTON-GRASS. (Pl. 3.)

Bristles naked, usually very numerous, often silky and becoming greatly elongated. Otherwise as in Scirpus.--Spikelets single or clustered or umbellate, usually involucrate with erect scale-like bracts, upon a leafy or naked stem; scales membranaceous, 1--3-nerved. Style very slender and elongated, 3-cleft. Achene acutely triangular. (Name composed of [Greek: e)/rion], _wool_ or _cotton_, and [Greek: phoro/s], _bearing_.)

[*] _Bristles 6, rust-colored, becoming tortuous and entangled; culm very leafy, bearing numerous spikelets in an involucrate decompound cymose-panicled umbel._

1. E. lineatum, Benth. & Hook. Culm triangular, leafy (1--3 deg. high); leaves linear, flat, rather broad, rough on the margins; umbels terminal and sometimes axillary, loose, drooping, the terminal with a 1--3-leaved _involucre much shorter than the long slender rays_; spikelets oblong, becoming cylindrical (2--4'' long), on thread-like drooping pedicels; _bristles at maturity scarcely exceeding the_ ovate green-keeled _pointed scales_; achene sharp-pointed. (Scirpus lineatus, _Michx._)--Low grounds, western N. Eng. to Ga., west to Minn. and Mo.

2. E. cyperinum, L. (Pl. 3, fig. 6--10, under Scirpus.) (WOOL-GRASS.) Culm nearly terete (2--5 deg. high); leaves narrowly linear, long, rigid, those of the _involucre 3--5, longer than the umbel_, the rays at length drooping; spikelets exceedingly numerous, ovate, clustered, or the lateral pedicelled, woolly at maturity (11/2--3'' long); the rust-colored _bristles much longer than the pointless scales_; achene short-pointed. (Scirpus Eriophorum, _Michx._)--Wet meadows and swamps, Newf. to Fla., west to Minn. and Iowa. Exceedingly variable in the character and size of the umbel, the typical form having the spikelets mostly clustered in small heads.--Var. LAXUM has the spikelets scattered, the lateral long-pedicelled.

[*][*] _Bristles 6, crisped, white; spikelet single, small; involucre of one short bract._