638 JDNCACE^. (rush family.) 



broad filaments; style about the length of the ovary ; seeds rather large (J" or 

 more long), nearly obtuse, delicately ribbed and cross-lined. — Sandy shores of 

 New England, the Great Lakes, and westward ; also in swamps, Lancaster Co., 

 Pcnn., Prof. Porter. (Eu.) 



-t- •)- Jnnermost sheaths leiif-hidrim] : stanipus 6. 



5. J, set^ceus, Uostkovius. Scape slender (I°- 3° high) ; panicle loose, 

 rather fcw-fiowcrcd ; flowers grcenisii (2" long) ; sepals lanceolate, sharp- pointed, 

 especially the 3 shining exterior ones, spreading in fruit, as long as the nearly 

 globose beak-pointed greenish or light-brown pod ; anthers as long as filaments; 

 style conspicuous; seeds (^" long) almost globose, ribbed and cross-lined. — 

 Pennsylvania (/?os</tWMs), Virginia? and North Carolina, southward near the 

 coast. — Doubtful if in our district. 



* * F/oinrs in clusters, Q-androiis : innermost sheaths at base of stem leaf-bearing. 



6. J. Roemerianus, Scheele. Scape stout and rigid (2° -3° high), its 

 apex as well as the leaves pungent; panicle compound ; 3-6 greenish or light- 

 brown flowers (1^" long) in a cluster; outer sepals lanceolate, sharp-])ointed, 

 longer than the obtusish inner ones, as long as the elliptical rather triangular 

 obtuse short-pointed brown pod ; anthers much longer than the broad filaments ; 

 styles shorter than the ovary ; seeds (J" long) oval, obtuse, very delicately ribbed. 

 (J. mari'timus of Amer. authors.) — Brackish marshes. New Jersey (Pursh), 

 Virginia and southward. 



§ 2. Grassy-leaved Junci ; ivith simple or rarelij branched stems, leafij at base 

 or throughout : leaves fat, or somewhat terete or setaceous and channelled, never 

 knotted : ■panicle terminal. 



* Flowers crowded in heads {produced in late summer). 



1- Leaver thread-like, hollow : sierns simple : heads single or few : seeds large, the 



loose seed-coat produced into conspicuous tails : stamens 6. 



7. J. St^gius, L. Stems slender (6' -16' high) from slender brfinching 

 rootstocks, 1-3-leaved below, naked above; heads 1 or rarely 2, of 3-4-flowcrs, 

 about the length of the sheathing scarious awl-pointed bract ; flowers pale and 

 reddish (2|-"-3" long) ; sepals lanceolate, the inner obtusish, | the length of 

 the oblong acuminate pod, as long as the slender stamens ; fibimcnts many 

 times longer than the oblong anthers ; recurved stigmas shorter than the style ; 

 seeds oblong, with a very loose slightly striated coat prolonged at both ends 

 (1|" long). — Peat-bogs bordering Perch Lake, JefiFerson County, New York. 

 N. Maine, G. L. Goodale. (New Brunswick, ^^r. Fowler. North shore of Lake 

 Sujjcrior, Mr. Wheeler.) — Flowers larger and ]i()d more abiuiilly j;oiiuc(l tlian in 

 the European plant. (Eu.) 



8. J. trifldus, L. Stems densely tnftcil from matted creeping rootstocks, 

 erect (5'- 10' high), sheathed and mostly leafless at the base, 2-3-leaved at 

 the summit, the upper thread-like leaves subtending the sessile head of 1-4 

 brown ( 1 i" - 2" long) flowers ; sepiils ovate-lanceolate, acute, equalling or rather 

 shorter than the ovate bcak-)iointed deep l>rown pod; anthers much longer than 

 the filaments; seed-: few, oMong, angled (1" long), faintly striate, short-tailed. 

 — Alpine summits of the mountains of New England, and N. New- York, and 

 high northward. (Eu.) 



