OaDEB 151.— JUNOACBjE. Y2l 



acute. — ^Borders of streams and lakes, N. T. to Wis., S. to Fla. St. 16' to .31' 

 high. Heads 5 to 6" diam., globular, 1 to 5 to 12, clustered or panioled. Sepals 

 with tawny awns, greenish at base. (J. nodosus, /3. megacephalus Torr.) • 



12 J. nodosus L. St. erect, slender ; Ivs. slender or often filiform, distinctly nod- 

 ous, the upper often exceeding the inflorescence ; hds. few (1 to 5 to 9), in a sim- 

 ple cluster, tawny or brown, 5 to 20-flowered ; sep. ovate-lanceolate, acuminate- 

 awned, 3-veined, shorter than the rc&troXs capsule ; stam. 6; seecfe oval, acute. — 

 Sandy swamps and shores, Can. to Car. Sts. 12 to 18' high. Heads'3 to 5" 

 diam. — Appears very different from the last. (J. Eostkovil E. Meyer.) 



13 J. articulatus L. /3. pelooaepus Gray. Stem erect, compressed, 1 to 3- 

 leaved ; Ivs. terete-compressed, setaceous, obscurely nodous ; panicle spreading ; 

 heads 2 to 6-flowered ; sep. oblong-lanceolate, the outer acute, the inner oUuse, 

 scarcely as long as the triangular-oblong, bluntly mucronate capsule ; stam. 6 ; 

 seeds slightly apiculate. — N. Bng. to Mich, and Can., in wet plaoe.s, not com- 

 mon. Sts. 9 to 18' high. Hds. chestnut colored. Anth. yellow. (J. pelaoarpus 

 E. Meyer.) 



14 J. militaris Bigl. Bayonet Rush. St. stout, terete, sheathed at base, bear- 

 ing helow the middle a single terete, nodous, erect leaf which much exceeds the in- 

 florescence; panicle erect, compound; hds. many, brown, 4 to9-flowered; sep. 

 lanceolate, acute, as long as the acuminate' capsule. — Bogs coastward, Mass. to 

 Ga. St. 2 to 3f high. Leaf 15 to 30', overtopping the stem by six inches or 

 more. Heads small. Stamens mostly 6. 



15 J. margindtus Rostkow. St. compressed; Ivs. flat, smooth, gramineous; 

 panicle, corymbous, simple, proliferous ; hds. 2 to 9-flowered, tawny or chestnut- 

 colored ; braoteoles awned ; sep^ obtuse, soft, about as long as the obtuse cap- 

 sule; stam. 3.— In low grounds, N. E. to Ga., "VV. to 111. Sts. 1 to 3f high. 

 Radical Ivs. numerous, sheathing, cauline 1 or 2. Panicle consisting of several 

 globous, 3 to 6-flowered heads, both pedunculate and sessile, longer than the 

 erect bracts at base. Sep. edged with dark purple, with a green keel. Jn. — 

 Aug. 



/3. BiFLdRUS. Stouter (2f high) ; hds. very numerous, mostly 2 or 3-flowered, 

 nearly black. — South, common. 



16 J. repens Mx. Low, tufted with creeping stolons ; Ivs. subulate-linear, 

 fascicled at the lower joints ; cyme simple ; hds. few, 3 to 8-flowered ; sep. subu- 

 late, awn-pointed, the 3 inner much longer ; caps, slender, trisulcate, much 

 shorter than the perianth. — Wet places, Ga. and Ma. Sts- many, 2 to 6' liigh. 

 Fls. 3 to 4" long. 



17 J. St^gus L. St. filiform, erect, rigid, leafy; Ivs. setaceous, slightly chan- 

 neled, obscurely nodous ; hds. few (1 or 3), termiual, about 3-flowered ; sep- 

 oblong, acute ; stam. 6 ; caps, triangular-elliptic, acute, longer than the perianth ; 

 seeds oblong, the loose testa produced into an appendage atboth ends. — Perch 

 Lake, Jeflerson Co., N. Y. (Gray) and Newfoundland. Fls. unusually large, 

 straw-color. 



18 J. trifidus L. St. sheathed at base; leaf solitary, linear setaceous, near Sie 

 top ; sheath ciliate ; bracts foliaceous, long, grooved ; hd. solitary, sessile between 

 2 long bracts, about 3-flowered, terminal; capsule Uackish, globular, beaked.— 

 White Hills, N. H., and Mt. Marcy, N. T. Sts. crowded, threadlike, 6' high. 

 Radical Ivs. 1 to 2, very short, cauline leaf resembles the 2 bracts, apparently 

 forming with them a foKaceous, 3-bracted invol. Jl. 



19 J. Conradi Tuckm. St. low, erect, slender, leafy; Ivs. few, subfiliform, ob- 

 scurely nodous; fls. separate, scattered, central and unilateral on the slender 

 branches of the di-trichotomous panicle ; sep. lanceolate, margins scarious, rather 

 shorter than the acwminate caps. — Wet places, Can. and IT. S., chiefly coastward. 

 Sts. 6 to 9' high, wiry, turfy. Stam. 6. Fls. often changed to little tufts of 

 leaves. 



20 J. bufoniua L. Toad Rush. Low, slender, tufted; sts. forking; branches 

 floriferous their whole length ; fls. separate, greenish, remote ; sep. lance-subulate, 

 awn-pointed, the 3 outer longer; caps, triangular oblong, obtuse, mucronulate, 

 much shorter than the perianth ; seeds oval, obtuse. — ® Damp, waste places, in all 



