(RUSH FAMILY.) 541 



-i- -i- Innermost sheaths leaf-bearing ; stamens 6. 



5. J. setaceus, Eostkovius. Scape slender (1 -3 high) ; panicle loose, 

 rather few-flowered; flowers greenish (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 capsule ; anthers as 

 long as the filaments ; style conspicuous ; seeds (" long) almost globose, ribbed 

 and cross-lined. Va. to Fla., west to Mo. and La. 



* * Flowers in clusters, (j-androus ; innermost sheaths at base of stem lea f-bearinr/ 



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

 apex as well as the leaves pungent ; panicle compound, open and spreading, 

 brown; 3-6 greenish or light-brown flowers (\\" long) in a cluster; outer 

 sepals lanceolate, sharp-pointed, longer than the obtusish inner ones, as long 

 as the elliptical rather triangular obtuse mucronate brown capsule ; anthers 

 much longer than the broad filaments; styles shorter than the ovary; seeds 

 ( |" long) oval, obtuse, very delicately ribbed. Brackish marshes, N. J. to 

 Fla. and Tex. 



7. J. maritimus, L. Resembling the last, but with a rigid contracted 

 green panicle, an ovary attenuated into a style of nearly its own length, a 

 greenish acute capsule which usually exceeds the acute sepals, and seeds with 

 distinct tails and stronger ribs. Known iu this country only from Coney 

 Island, N. Y., where it is apparently indigenous. (Eu.) 



2. Stems simple (rarely branched), leafy at base or throughout ; leaves flat, or 

 somewhat terete or setaceous and channelled, never knotted ; panicle or head 

 terminal. GRASSY-LEAVED JUNCI. 



* Flowers in close heads (produced in late summer). 



i- Leaves thread-like, hollow; stamens ft; seeds few, large and caudate; the 

 sinnle head (sometimes 2) 1 -^flowered. 



8. J. stygius, L. Stems slender (6- 16' high) from slender branching 

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

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

 reddish (2^-3" long) ; sepals lanceolate, the inner obtnsish, f the length of 

 the oblong acuminate capsule, as long as the slender stamens ; filaments many 

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

 seeds oblong, with a very loose coat prolonged at both ends (H" long). Peat- 

 bogs, Newf. to northern N. Y., west to Mich, and N. Minn. (Eu.) 



9. J. trifldus, L. Stems densely tufted from matted creeping rootstocks, 

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

 summit, the upper thread-like leaves subtending the sessile head ; flowers brown 

 (1^-2" long) ; sepals ovate-lanceolate, acute, equalling or rather shorter than 

 the ovate beak-pointed deep brown capsule ; anthers much longer than the 

 filaments ; seeds few, oblong, angled (1" long), short-tailed. Alpine summits 

 of N. Eug. and N. Y., and far northward ; also in N. J. (Eu.) 



-t- -i- Leaves flat and qrass-like ; stamens 3; stems flattened, simple, leafy. 



10. J. ripens, Michx. Stems ascending (4-6' high) from a fibrous an 

 uual root, at length creeping or floating ; leaves short, linear, those of the stem 

 nearly opposite and fascicled; heads few in a loose leafy panicle, 3- 12-flow 



