JUNCACEJE. (RUSH FAMILY.) 495 



* * Leaves terete, knotted : stamens 6 : flowers clustered. 



11. J. caudatUS, n. sp. Rigid throughout ; stem stout, from a thick and 

 creeping rhizoma; leaves commonly 3, short and pungent; panicle erect, com- 

 pound, mostly contracted; clusters numerous, more or less crowded, 2-4-flow- 

 ered; sepals lanceolate, acute, unequal, the inner ones half as long as the oblong 

 obtuse-angled acute capsule; seeds with a long and tail-like appendage at each 

 end, white and shining. — Pine-barren swamps and bogs, Middle and West 

 Florida. Aug. and Sept. — Stem 2° high. Leaves 2' - G' long, strongly knotted. 

 Capsules light brown, turning almost black. 



* * * Leaves terete, obscurely knotted : stamens 6 : flowers solitary , in slender 1-sided 

 cymose panicles, often transformed into a tuft of rudimentary leaves. 



12. J. abortivus, n sp. Rhizoma creeping, thick and woody; stems 

 slender (1°- 2° high), terete; leaves filiform, rather rigid; panicle compound, 

 diffuse, the branches almost hair-like ; flowers minute, scattered; sepals oblong, 

 the inner ones obtuse, with membranaceous margins, as long as the (immature) 

 subulate capsule ; style slender. — Grassy margins of ponds, near the coast, 

 West Florida. July -Sept. — Plant deep green. Flowers all abortive or bud- 

 like. 



13. J. Conradi, Tuckerm. Rhizoma creeping, filiform ; stems slender 

 (6'- 10' high); haves filiform, tender; panicle compound, diffuse; the small 

 flowers somewhat scattered ; sepals acutish, shorter than the oblong taper-pointed 

 capsule ; seeds without appendages. — Sandy margins of ponds and swamps, 

 South Carolina, and northward. July. — Leaves more slender, and the divis- 

 ions of the panicle shorter and more rigid than those of the preceding species. 



# * * * Leaves knotless, concave or flattened. 



14. J. marginatum, Rostk. Stems flattened (1°- 2° high); leaves linear, 

 flat or concave ; panicle mostly simple ; heads few -many-flowered, rarely soli- 

 tary or by pairs ; flowers triandrous ; exterior sepals lanceolate or ovate-lance- 

 olate, awn-pointed ; the interior oblong, obtuse, broadly margined, about as long 

 as the globular dark brown capsule ; seeds oblong, acute at each end. (J. aris- 

 tulatus, Michx. J. cylindricus, Curtis, the many-flowered heads cylindrical.) — 

 Var. biflorus. (J. biflorus, Ell.) Stems taller (2° -3° high) : panicle decom- 

 pound, diffuse; heads very numerous, 2-4-flowered; seeds narrower and more 

 pointed. — Ditches and low grounds, Florida, and northward. July -Sept. — 

 The variety is confined to the pine barrens of the lower districts. 



15. J. bufonius, L. Annual; stems low (2'- 8' high), tufted; often 

 branched; leaves very narrow; panicles forking; flowers solitary or 3-6 in a 

 cluster; sepals whitish, lanceolate, acute, longer than the oblong obtuse pale 

 capsule. — Damp cultivated ground, apparently introduced. April and May. 



3. CEPHALOXYS, Dcsv. 



Flowers as in Juncus. Stamens 3. Capsule many-seeded, 3-celled, the par- 

 titions separating from the valves at maturity, and forming, with the united 

 placenta?, a free 3-winged central column. Seeds ovoid, without appendages.— 



