JUNCACK^. (rusu family.) 49-') 



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



11. J. caudatus, n. sp. Ri<^id throughout; stem stout, fiotn 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 witii a long and tail-like appendage at each 

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

 'Florida. Aug. and Sept. — Stem 2° high. Leaves 2' - 6' long, strongly knotted. 

 Capsules light brown, turning almost black. 



* * * Leaves terete, ohscureli/ knotted : stamens 6 : Jioivers solitary, in slender 1-sided 

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



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

 slender (l°-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); leaves filiform, tender; panicle compound, diff"use; the small 

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

 capsule ; seeds witliout 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 sjiecies. 



* * * * Leaves knoiless, concave or flattened. 



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

 flat or concave ; panicle mostly simple ; heads few-manv-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.) — 

 Van 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 oI)tuse pale 

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



3. CEPHALOXYS, Desv. 



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

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

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



