Y24 Order 151.— JUNCACE^B. 



fissure opening in the- sido of the stem about half way up. Fls. small, gree*, 

 numerous, with 3 whito anthers and yellowish seeds. Jn., Jl. 



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

 minutely striate, flaccid ; panicle subsimple, lateral, near the middle of the scape ; 

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

 shining, obovate, mucronate capsule. Borders of lakes, N. States and Can. 

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

 some sessile. Jl. 



4 J. setacetis Rostkow. Scape filiform, striate ; umbel lateral, subsimple, few- 

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

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

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

 to 30-flowered, bursting from the sido of tho scape some distanco below tho sum- 

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



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

 at base ; panicle decompound, far below the summit ; fis. aggregated in roundish 

 l^eads ; sep. lanceolate, acuminate, longer than the roundish-obovate, mucronato 

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

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

 bract. Fls. dark brown. Jl. (J. acutus Ell., etc.) 



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

 joints; paniclo cymous, branches few, subereet, heads 5 to 20, green, about 20- 

 flowercd; sip. rigid, lance-acuminate, sharp; stam. 3, nearly as long; style much 

 exserkd ; cups, taper-pointed, as long as tho sepal3 ; seeds oblong, inertly acute at 

 each end. — Can. and U. S., especially coastward, in wet places. St. 1 to 2f high, 

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

 straw-colored. May — Jl. (J. echinatus El!.) 



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

 slender, strict, many-jointed; panicle decompound, hose; 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, abruj)ily acumin- 

 ate, lunger than tho sepals, at length brownish; seeds oblong, with a white tail at 

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

 lvs. shorter. Heads 8 to 2 0-f lowered, 4" diam. May — Jl. (J. paradoxus Gray.) 



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

 jointed ; panicle de- or suprade-compound, loosely spreading ; lids, few-flowered, 

 straw-color ; sep. lanceolate, acute, shorter than tho 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-flowercd (in spec, from Wis., 1 to 3- 

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

 cillitus Muhl. nee Wulf.) 



9 J. acuniinatus Mx. St slender, strict, terete ; lvs. terete, many-jointed ; pani- 

 cle decompound, branches subereet; heads numerous, 3 to 5-floivered, chestnut 

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

 shorter than the oblong-triangular, abruptly pointed capsule ; seeds tailed at hoVi 

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

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

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



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

 spreading, diffuse, decompound; heads numerous, globular, 5 to \2-flowertd. chest- 

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

 ovate, abruptly pointed capsule; stam. 3; seeds oval, 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. 

 acuniinatus E!l. nee Mx.) 



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

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

 some pedunculate, rarely paniculate, large, 30 to GO-ftowered, tawny; sep. subu- 

 late, bristle-pointed, scarcely shorter than the acuminate capsule ; stam. G ; seeda 



