juncaceye. (rush family.) 541 



H- -*- Innermost sheaths leaf-bearing : stamens 6. 



5. J, set^ceus, Kostkovius. Scape slender (I -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, G-androus ; innermost sheaths at base of stem leaf-bearing. 



6. J. HoBmeriaims, 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 (l-^"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 

 ( I" 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 in this country only from Coney 

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



§ 2. Stems simple {rarely branched), leafij 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). 



•*- Leaves thread-like, hollow; stamens G', seeds few ^ large and caudate; the 

 single head (sometimes 2) I - 4-flowered . 



8. J. st^giUS, 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. 

 abo\it the length of the sheathing scarious awl-pointed bract ; flowers pale and 

 reddish (2^-3" long) ; sepals lanceolate, the inner obtusish, 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 tlian the style ; 

 seeds oblong, with a very loose coat prolonged at both ends (1|" long). — Peat- 

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



9. J. trifidus, 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 

 (l|-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. Eng. and N. Y., and far northward ; also in N. J. (Eu.) 



•♦- ■»- Leaves flat and grass-like ; stamens 3; stems flattened , simple, leafy. 



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

 nual 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- 



