352 ORDER 150. JUNCACE^E. 



2 Heads 5-15-flowered, and numerous, in April Jane Nos. fc4, 25 



z Heads 20-80-flowered, few and large Nos. 26,27 



1 JT. seta.ce us Rostk. Scape weak, slender, (not setaceous), 1 2f ; Ivs. shorter ; panicle 



small, 20-30-flwd.. flowers separate ; sepals very acute, pod globous. Sea-coast, S. 



2 J. Roemerianus Scheele. Scape stout, rigid, 2-4f, and leaves pungent ; panicle 



compound ; flowers capitate ; sep. t-harp-pointed ; pod turgid, a little shorter ; heads 

 5-8-flowered, dark brown. Marshes, Va. to Fla. (J. maritimus C-B.) 



3 JT. effusus L. Softs. Scapes straight, not rigid; panicle decompound, often dif- 



fuse ; flowers green, sep. as long as the obovoid, obtuse pod. Wet : common. 2 3f. 



4 J. nllformis L. Scapes very slender, weak, the subsimple panicle near the mid- 



dle ; sepals longer than the obtuse, mucronate pod. Me. to Mich. 1 2f. 



5 J. Simtliii Engelm. Scapes slender, rather rigid, 2 3f; cyme few-flwd. ; flowers 



brown, 1" ; pod round-ovoid, mucronate, exserted. Broad Mountain, Pa. (Porter). 



6 J". Bulticus Dethard. Scapes in dense rows on the rhizome, rigid, pungent ; pan. 



near the top, brown ; sep. erect, very acute, equalling the elliptical, mucronate pod 

 (H'O- Sandy shores, Me. to Penn. and Wis. 1 3f. 



7 J. trifidus L. Stems tufted, 5 S', wiry, sheathed at base, 3-leaved at top, and with 



a sessile head of 3 blackish flowers ; capsule globular. Mountains, N. H., N. Y. 



8 J". Stygius L. Stems few-leaved at base, leafless at top, 712' ; heads 13, about 3- 



flowered ; sepals shorter than the elliptic pod ; seeds large, tailed. Me., N. Y. 



9 J. repens MX. Stems low, tufted, 2 6' ; leaves linear, opposite, fascicled ; sepals 



subulate, awn-pointed, 31", the slender pod 2". (i) Md. to Fla. May. 



10 J. mary,ina.tus Rostk. Stem compressed ; leaves linear, flat ; cyme compound , 

 heads many, 2-9-flowered, chestnut-brown ; pod globular. 1 3f. 



ft. biflbrux. Heads very numerous, 2 3-flowered, nearly black. S. 



1 1 J. bu foiiius L. Toad R. Slender, 38', tufted : leaves 12' ; branches 2, flowei 

 bearing the whole length ; flowers remote, green ; the 3 outer sep. longer. Common. 



12 J. tenuis Willd. Stems wiry, 824' ; leaves flat-filiform, 38' ; bracts longer than 

 the loose panicle ; sepals green, longer than the roundish pod. Common. 



/3. ec und u*. Flowers 1 -rowed on the branchlets ; bracts shorter than the panicle. 



13 J. d idiot om us Ell. Stem wiry, 1 2f; Ivs. terete-filiform, channelled, on long 

 sheaths ; panicle forked or den^e ; pod roundish, long as sepals. S. Too near No. 12. 



14 J. Gerardi Loisel. Black Grass. Sts. wiry, leafy, 1 2f; Ivs. thread-ensiform, 3 8': 

 pan. longer than the bracts ; style conspicuous pod blackish, long as sepals. Marshes. 



15 J. Cireeuii Oakes & Tuckm. Wiry scapes and filiform Ivs. rigid ; bract filiform, 

 twice longer (4') than the small panicle ; flowers secund, straw-brown ; sepals ovate, 

 shorter than the ovoid pod. Coasts of N. Eng. and Mich. 1 2f. 



1 6 J*. Vaseyl Engelm. Sepals lanceolate, as long as the oval pod ; bract scarcely 

 longer than the panicle. Otherwise like No. 15. Mich. (Prof. Porter). 



1 7 JT. asper Engelm. Sts. rigid, 2 3f ; Ivs. rigid and ivugh, 3 10' ; hds. scattered, 3-5 

 flwd., sep. 2^", strongly veined, subequal ! shorter than the pointed brown pod. N. J 



18 J. caudatus Chapm. Sts. rigid, 2 3f; Ivs. 3, rigid, erect; panicle large, erect, 

 hds. 2-4-flwd. ; sep. 2", unequal ; pod 3", finally black; eds. with long white tails. S. 



19 J* Canadensls Gay. Sts. terete, with 2 or 3 erect, smooth Ivs. ; fls. in Aug. and 

 Sept., 350 in a head, paniculate, brownish ; sepals lanceolate, 3 outer shorter, none 

 longer than the oblong- triangular pod ; stamens 3. Common and very variable. 



a, coarclatu*. Heads 2-5-flwd., in a contracted panicle ; pod brown, exserted. 

 /3. brncliifd pliahi*. Hds. 3-5-flwd., in a spreading panicle ; pod brown, exserted. 

 y. HitbrniuiaiiiH, Slender ; heads 8-20-flwd., remote ; seeds with short white tails. 

 S. lt>ng-tcati<ftitu# t Stouter ; hds. 8-50-flwd., approximate ; sde. slender, long-tailed. 



20 J. pelocarpus Meyr. Sts. slender, 2-3-lvd., 1020'; panicle much branched ; fls. 

 in pairs or solitary, scattered, reddish ; pod oblong, pointed with the slender stylo, 

 longer than the oblong sepals. Wis. to Me. and Fla. (J. Conradi Tuckm.) 



21 J. articulAtus L. Stems If, with 12 leaves ; heads 3-8-flowered, crowded in a 

 spreading panicle : sepals brownish, oblong; pod deep brown, oblong, exserted N. 



