o22 Jl'XCACE.E. (itlSH FAMILY.) 



terior slmrtcr; capsule triaiij^nlar, Iniifjor tliaii tlie sejial.s ; scoils aj)|)(/n(lage(L 

 — Wt't iiiMiiiiil ; (•(•imiiuii. Aiii^ust- Sept. 



Var. subcaudatUS, Kiij^olm. Stem slcmler, 1" - 2° lii^^li ; ])aiiirlf s])rca(l- 

 iii<2;; heads 8-2()-tl()WiTeil ; sepals verv aeiite ; seeds sliurt-ajjpeudaged. — 

 S«ani]is, (Jei^rgia and South Carolina. 



Var. longecaudatus, Kngclm. Stem stout, 2° -3^ liigli ; panicle erect, 

 conipomid, tlie iiiany-llouered liea<ls se|)arate or clustered; seeds longap- 

 pendaged at hoth ends. — Svvami)S and shallow jK^nds, Georgia to North 

 Carolina. 



« * Leaves terete, kuolted : utinnfus 6 (rmUihle in No. 14) ; Jluwers clustered. 



14. J. caudatUS, Clia))m. Rigid throughout ; stem stout, from a thick 

 and creej>ing rliizonia; leaves commonly 3, sliort and pungent; panicle erect, 

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

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

 oblong obtuse-angled acute capsule ; seeds with along and tail-like ap])endage 

 at each end, white and shining. — Tine barren swamps and bogs Sejit. — 

 Stem 2"^ iiigh. Lea^es 2' -6' loug, strongly knotted. Capsules liglit brown, 

 turning ahnust black. 



15. J. asper, Kngelm. Rigid, erect (2°-3° high), papillose-scabrous; 

 leaves terete ; panicle erect ; heads 2 - 6-flowered ; sepals ovate-lanceolate, 

 strongly nerved, very acute, the inner ones longer, and barely shorter than 

 the beak-pointed capsule; seeds oblong, finely ribbed. — Swamps, Henderson 

 County, North Carolina {Canbjj), and northward. 



16. J. militaris, Bigel. Stout (2° -4° high), 1 -leaved ; heads panicled, 

 5- 10-flowered ; sejials lanceolate, acute, as long as the ovate, taper-l^eaked, l- 

 cellcd capsule ; stamens 6 ; seeds gloliose-ovate, abruptly pointed. — In water, 

 Alabama (l)nniimond), and northward. — Probably not within my limits. 



» * * Leaves terete, ohsrurelij knotted: stamens 6: Jlowers solitary, in slender 

 l-slded ci/mose panicles, mostly transformed into a tuft of rudimentary leaves. 

 1". J. pelocarpus, E. Mey. Rhizoma creeping, filiform; .«tems slen- 

 der (6'- 10' high) ; leaves filiform, tender; panicle compound, diffu.se; 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. 



Var. crassicaudex, Eugelm. Rhizoma thick; stems taller (l°-2°); 

 panicles larger, and diffuse. — Grassy margins of ponds near the coast. West 

 Florida. July -Sept. 



* * * * Leaves knolless, concave or flattened. 



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

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

 tary or b}' pairs ; flowers triandrous ; exterior sepals lanceolate or ovate-lance- 

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

 long as the glolmlar dark brown capsule; seeds oblong, acute at each end. 

 (J. cvlindricws, Curtis, tlie many-flowered heads cyliiulrical.) — Var. biflorus. 

 Stems taller (2° - 3° high) ; panicle decompound, diffuse ; heads very numer- 



