APPENDIX. 493 



24. J. GREEnii, Oakes & Tuckerm. Shorter ; leaves deeply cliannelecl ; panicle dense, many-flowered ; 

 capsule ovate-oblong, obtuse ; seeds ovoid, tails shorter.— N. England ; Michigan. 



(2.) Seeds only apiculate. 



25. J. TENUIS, Willd. Loaves flat ; sepals equal, lanceolate, subulate, spreading, exceediuK the ovoid 

 retnse green capsule; seeds J" long, white-pointed at both ends.-Throngh the United States from the 

 AtlantU' to the Pacific and southward to the Tropics and W. Indies ; W. Europe. The northeastern Var. 

 SECUNDUS, Eng., has smaller secund flowers along the iucurved branches, and in Var. congestus Eng 

 of California and Colorado, the branches are contracted into a head and the flowers darker-colored ' 



26 J. DICHOTOMUS, Ell. Stouter ; leaves filiform, slightly channeled ; sepals as long as the globose 

 beaked reddish capsule ; otherwise nearly as the last.— N. Jersey to Florida. 



27. J. Geeaedi, Lois. Panicle contracted ; sepals oval-oblong, obtuse, incurved, equaling the oval 

 obtuse muoronate capsule; seeds larger, obovate.-Salt marshes from Canada to Florida, and on the 

 Great Lakes. 



(6.) Stems branched, difi'use, leafy ; root annual. 



28. J. BUPONIUS, L. Low and slender. See page 357. 



* * * Flowers capitate, (in Nos. 29 and 30 often solitary.) 



(a.) Stamens 3, (in J. leptocmdis 3-6.) 



(1.) Annual, very low, branched; leaves filiform. 



29. J. Kblloggii, Eng. Much branched; leaves channeled above, 6-10" long; branohlets short, 

 leafy below, bearing loose terminal 3-5-flowered heads and sometimes longer 2-flowered peduncles in the 

 axils ; sepals lanceolate-subulate, equal, pale-green and whitish, 11-2" long, exceeding the stamens and 

 nearly equaling the ovate obtuse mucronate membranous capsule ; anthers oblong-linear, shorter than 

 the filament ; seeds ovate, i" long, scarcely pointed, with a few strong ribs.— San Francisco. 



30; J. TRiPORMis, Eng. Less branched, the many capillary scapelike peduncles much exceeding the 

 leaves ; flowers few, in small heads, or solitary.— See page 357. Variable ; the typical form being 2-4' 

 high, heads 3-5-flowered, sepals slightly exceeding the stamens and rather long-mucronate capsule, an- 

 thers twice longer than the filaments, style exserted, several times longer than the ovate ovary, stigmas 

 elongated. Var. BEACHYSxraus, Eng., is 1-2' high, flowers 1-3 together, sepals twice longer than the 

 stamens, equaling, or nearly so, the obtuse very shortly mucronate capsule, anthers half as long as the 

 filaments, the very short style and stigmas included. Var. unifloeus, Eng., is i-V high, the solitary 

 flowers mostly dimerous. 



(2.) Stems compressed, simple, leafy ; leaves flat. 



31. J. KEPBNS, Mx. Annual; stems ascending or creeping; leaves fascicled on the stem; inner 

 sepals much the longer ; capsule linear, obtuse ; filaments long. — Maryland to Florida and Louisiana. 



32. J. MARGINATUS, Eostk. Perennial, erect, 1-3° high ; inner sepals mostly obtuse, exceeding the 

 acute outer ones, equaling the snbglobose obtuse scarcely pointed capsule ; anthers purple. — N. Jersey to 

 W. Canada and Illinois, southward to S. Carolina, Arkansas and Texas. 



33. J. LBPTOCAULis, T. & G. Eootstook small, apparently perennial ; stems tufted, slender, 6-14' 

 high, slightly compressed, fistulous, few-leaved; heads 1-3, of 3-7 light-green flowers; bracts ovate, 

 awned, mostly shorter than the subpedioelled flower ; sepals 2" long, usually equal, ovate-lanceolate, 

 acuminate awned, J longer than the 3-6 stamens and the obovate retnse mucronate capsule ; anthers 2-3 

 times shorter than the filament ; stigmas equaling the ovary with its very short style ; seeds obovate, 

 pointed, strongly ribbed. — Arkansas ; Texas. 



(6.) Stamens 6. 



34. J. PALCATUS, E. Mey. Eootstock ascending, stoloniferous ; stems 2-15' (usually 6-8') high, com- 

 pressed, 1-leaved or naked ; leaves flat, adverse, mostly laterally curved ; heads usually single, 8-18-flow- 

 ered, (in Var. paniculatus about 5-flowered, in a simple or suboompound panicle ;) sepals 3" long, ovate, 

 scabrous, the outer acuminate, equaling or exceeding the obtuse sometimes mucronulate inner ones and 

 the obovate obtuse muoronate capsule ; anthers much exceeding the filament ; stigmas long and exserted ; 

 seeds lanceolate-ovate, subcaudate, costate-reticulate. — Unalaska to California. 



35. J. OBTUSATUS, Eng. Eootstock creeping ; stems tufted, a span high, mostly 1-leaved ; nearly 

 equaling the flat linear leaves ; heads few, few-many-flowered, in a simple panicle ; sepals 1^-2" long, 

 green with brown margins, slightly scabrous, ovate, equal, the outer often cuspidate, the inner very ob- 

 tuse, much shorter than the ovate obtuse very shortly mucronate capsule ; stamens half-longer than the 

 sepals; stigmas long, exserted; seeds ovate, obtuse or scarcely pointed, reticulate. — Big Tree Grove, 

 California. 



36. J. LONGiSTYLis, T. & G. 1-2° high ; heads in a contracted panicle, rarely solitary ; sepals equal, 

 ovate-lanceolate, acute ; seeds oblanceolate or obovate. See page 357. 



