560 CLV1. JUNCACE. "Juncus. 
with an involucre of two unequal, pungent bracts ; perianth segments lanceolate, 
acute, half as long as the roundish-obovate, mucronate capsule. Sandy sea- 
coasts, N. J, to Ga. Scapes fascicled on the rhizomas, forming dense tufts, 2— 
3f high. Panicle 2—3/ long. Involucre with one of the bracts longer, the 
other shorter than the panicle. Perianth brown, the 3 sepals longest, acumi- 
nate, reflexed at apex. July. 
3. J. errusus. Soft Rush. Bull-rush. 
Scape straight, not rigid ; panicle lateral, loose, decompound ; caps. obovate, 
obtuse.— Very common in ditches and moist lands, forming tufts, Can. and U 
S. Scape solid, with a spongy pith, soft, striate, 2—-3f high, bearing a loose, 
spreading panicle, which protrudes from a fissure opening in the side of the 
stem about half way up. Flowers small, green, numerous, with 3 white an- 
thers and yellowish seeds. June, July. 
4. J. seraceus. Rostkow. (J. filiformis Michz.) Bristly Rush. 
Scape filiform, striate; wmbel lateral, compound, few-flowered ; ped. com- 
pressed, several-flowered ; perianth segments very acute.—Swamps, Can. and 
U.S. Avery slender species, growing in tufts about2f high. Scapes sheathed 
at base. Panicle small, 20—30-flowered, bursting from the side of the scape 
some distance below the summit. July. 
5. J. riuirormis. Linn. (not Michz.) Thread Rush 
Creeping, leafless; scape slender, filiform, minutely striate, flaccid; pani- 
cle subsimple, lateral, near the middle of the scape; sep. pale, nearly equal, 
lanceolate, a little longer than the pale, shining, obovate, mucronate capsule. 
White Hills, N. H., Green. Scape a few inches in length. 
* * Leaves nodose-articulate, subterete. 
6. J. mimiraris. Bw. Bayonet Rush. 
Lf. solitary, jointed, longer than the stem; panicle terminal, proliferous ; 
hds. about 5-flowered ; st. thick, round, smooth, 2, 3 or 4f high.—Ponds, N. Eng. ! 
Leaf jointed, cylindrical, loosely cellular within, 2—3f long, inserted below the 
middle of the stem, but rising above its summit. Panicle erect, terminal, ccm- 
posed of several pedunculate heads, each with 4—6 sessile flowers. 
7. J. noposus. (J. polycephalus. Michz. J. echinatus. Muhl.) 
St. leaves subcompressed; panicle terminal, decompound; Ads. globose, 
dense, 10—15-flowered; sep. subequal, lanceolate, rigid, very acute, about 
equaling the oblong-lanceolate, acute, triquetrous, shining capsule; segments 
3—6.—In boggy meadows, U.S. and Can. Stem 14—2f high. Leaves thick, 
jointed by internal, transverse partitions. Heads resembling small burrs, some 
sessile, others pedunculate. Leaflets of the perianth produced into a short cusp 
orawn. Aug. Sept. 
a. major. St. and lvs. thick, the latter longer, compressed ; hds. few, 6/’ diam. 
B. altior. St. (2f high) and lws. terete, very slender; Ads. 5—9, 4” diam. 
y. minor. Lws. almost filiform; Ads. 1—3, as large as in ~. 
8. J. acuminatus. Michx. (J. acutiflorus. Hook ?) 
St. erect; lvs. terete; panicle terminal, compound; hds. 3—6-fiowered, 
both pedunculate and sessile; leaflets of the perianth \inear-lanceolate, mucro- 
nate, shorter than the acute capsule-—Very common in boggy meadows, U. S. 
Stem 12—18’ high, tough and wiry. Leaves few and short, with knot-like 
joints. Panicle erect. Aug. > 
9. J. supverticiLLATus. Willd. (J. fluitans. Micha.) 
St. few-leaved, compressed ; dvs. compressed, fistulous, articulate ; panicle 
subcorymbose, elongated ; fls. in dense, capitate fascicles; Ads. many-flowered, 
pedunculate or sessile; perianth shorter than the triquetrous, acuminate cap- 
sules ; sep. linear-lanceolate, keeled, striate, cuspidate. Swamps and shores of 
ponds, Penn., Dr. Darlington, to Wis., Lapham! Stem 18’/—2f high, slender, 
Leaves much shorter. Panicle 4—8’ in length, the branches subverticillate, 
diverging, very unequal. Sepals with scarious, white margins. 3 
10. J. conrApi. Tuckerman, in Torr., N. Y. State Fl. II. p. 328, imedit. 
St. leafy; dvs. few, terete, subfiliform, obscurely articulate, shorter than 
the stem; fs. single, scattered, central and unilateral on the slender branches 
