1^24 Obdee 161.— JUilCACEja. 



fissure opening in the side of the stem about half way up. FI3. amaU, greea, 

 numerous, with 3 white anthers and yellowish seeda Jn., Jl. 



3 J. filiformis L. (not Mx.) Rhizome creeping, leafless, scape slender, filiform 

 minately striate, flaccid ; panicle suisimple, lateral, near the middle of the scape ; 

 fls. separate; sep. pale, nearly equal, lanceolate, a little longer than the pak, 

 shining, obovate, muoronate capsule. Borders of lakes, K States and Can. 

 Scape 1 to 2f high, with a few brown sheaths at base. Ms., some pedicellate, 

 some sessile. Jl. 



4 J. setaceijs Roatkow. Scape filiform, striate ; umbel lateral, suisimple, few- 

 flowered; ped. compressed, several flowered ; perianth segments very acute. — 

 Swamps, Peun. to Fla., growing in tufts, about 2f high. Scapes weak and .slen- 

 der (not setaceous), .sheathed at base with the shorter leaves. Panicle small, 20 

 to 30-flowered, bursting from the side of the scape some distance below the sum- 

 mit. Fls. in small heads, scarcely brownish. Jn., Jl. 



5 J. maritimus Lam. Black Rusu. Scapes numerous, tall, rigid, terete, sheathed 

 at base; panicle decompound, far below the summit ; fls. aggregated in rovmdish 

 Jieads ; sep. lanceolate, acuminate, longer than the roundish-obovate, mucronato 

 capsule. — In brackish marshes, Va. to Fla. Scapes 2 to 5f high, forming dense 

 tuft?. Panicle 2 to 3' long, with numerous heads, and subtended by a shorter 

 bract. Fls. darlc brown. JL (J. acutus Ell., etc.) 



6 J. scirpoides Lam. St. leafy, terete, stout ; Ivs. terete, slender, with frequent 

 joints; panicle cymous, branches few, subcrect, heads 5 to 20, green, about 20- 

 flo wered ; sep. rigid, lance-acuminate, sharp ; stam. 3, nearly as long ; style much 

 exserted; caps, taper-pointed, as long as tlie sepals; seeds oblong, merely acute at 

 eaoli end. — Can. and D". S., especially coastward, in wet places. St. 1 to 2f high, 

 about 3-leaved below. Lvs. shorter than the stem. Heads 3 to 4" diam., finally 

 straw-colored. May — Jl. (J. echinatus Ell.) 



7 J. polycephalus Mx. St. few-leaved, terete, strict; Its. terete-compressed, 

 slender, strict, many-jointed; panicle decompound, loose; heads 5 to 15, globous, 

 many-flowered ; sep. subulate, acuminate, bristle-pointed, the 3 outer longer and 

 wider, greenish, stam. 3, nearly as long ; caps, oblong-triangular, abruptly acumirir 

 ate, longer than the sepals, at length brownish ; seeds oblong, with a white tail at 

 each end. — Wet places, Can. and tj. S. Sts. 12 to 30' high, rigid, but slender, the 

 lvs. shorter. Heads 8 to 20-flowered, 4" diam. May — Jl. (J. paradoxus Gray.) 



8 J. debilis Gray. Sts. weak and slender, flattened; lvs. flattened, obscurely 

 jointed ; panicle de- or svpradc-compound, loosely spreading ; hds. few-flowered, 

 straw-color ; sep. lanceolate, acute, shorter than the oblong capsule ; seeds ob- 

 long, acute at each end. — Common in wet places. Can. and U. S. Sts. 9 to 24' 

 long, from fibrous roots. Heads about 5-flowered (in spec, from "Wis., 1 to 3- 

 flowered), fls. 2" long. Lvs. nearly filiform in the smaller plants. (J. subverti- 

 cillatus Muhl. neo Wulf.) 



9 J. acumin&tus Mx. St. slender, strict, terete ; lvs. terete, many-jointed ; pani- 

 cle deoompoundj branches suberect; heads numerous, 3 to 5-flowered, chestnut 

 brown, fls. erect; sep. strongly veined, lanceolate, acute and mucronate, much 

 shorter than the oilong-triangular, abruptly pointed capsule ; seeds tailed at both 

 ends. — Very common in bogs, eta, Can. and XJ. S. Sts, 9 to 30' high, slender or 

 rather stout, the slender lvs. much shorter, many-jointed. Capsules becoming 

 deep brown or (in the Southern spec.) almost black. 



10 J. Pondii. St. rather stout, terete : lvs. terete-compressed, jointed ; panicle 

 spreading, diffuse, decompound | fieads numerous, globular, 5 to 12-flowered, chest- 

 nut colored ; sep. equal, lance-acuminate, bristle-pointed, as long as the triangular- 

 ovate, abruptly pointed capsule ; stam. 3 ; seeds oral, merely acute at each end. — 

 Wet places. Car. to Ga. (Feay, Pond,) and Ky. Sts. 1 to 2f high, with 1 or 2 

 short leaves. Heads 20 to 40, 3 to 4" diam., in a wide panicle. Mar. — Jn. (J. 

 acuminatus Ell. neo Mx.) 



11 J. megacephalua. St. stout, ascending at base ; lvs. distinctly nodous, elon- 

 gated, the upper usually exceeding the inflorescence ; heads few, glomerate, or 

 some pedunculate, rarely paniculate, large, 30 to 60-fiowered, tawny; sep. subu- 

 late, bristle-pointed, scarcely shorter than the acuminate capsule ; stam. 6 ; seeds 



