482 JUXCACEJS. 



rerr acute, one third or one half the length of the prismatic triangular MK\ aU 

 niptly acute pod ; s.-cds tail-pointtd at both ends. (J. sylvatu-u-s J/.v/<f. J dii- 

 adensis, Gay.} Peat-hogs, ami sandy -borders of ponds. Tods turning derp 

 chestnut-bro\vn. Tails shorter than the body of the seed. 



*- *- SUunent 6. (Head* chestnut-colored: the pods becoming Uackish or broicn,and 

 shining : seeds tailless, but sometimes short-pointed at but ft ends.) 



10. J. a Talc Hiatus, L. Stem erect (9'- 18' high), and with the 1-3 

 lender leaves slightly compressed; panicle spreading; heads 2 - -floicen>d ; s^vls 

 lance-oblong, the outer acute, the inner mostly obtuse, usually mucronate, shorter 

 than the' ovate-oblong triangular abruptly mucronatc-pointfd pod. (J. Umprocarpus, 

 Ehrh., &c.) Var. PELOC.4RPU8 (J. pelocarpus, E. Meyer ed. 1.) is a va- 

 riety with fewer flowers in the head, and rather blunter pods slightly exceeding 

 the sepals. Wet places, Rhode Island to Lake Huron, and northward : the 

 genuine European form received from Mr. Olnfij and Dr. &nlweli. (Eu.) 



11. J. militftris, Bigel. Stem stout (2-3 high), bearing a solitary 

 cylindrical bayonet-like leaf below or near the middle, which overtops the crowded 

 panicle; heads numerous, 5- 1 Q flowered ; sepals lanceolate, sharp-pointed, as long at 

 tJte ovate taper-pointed pod. Sandy bogs, Tewksbury and Plymouth, Massachu- 

 setts, pine barrens of New Jersey, and southward. Rootstock thick, creeping. 

 Leaf stout, 1 - 2 long. Heads 2" - 3" wide, brown. 



12. J. .noclosus, L. ! Stem erect, slender (6'-15' high), 3-5-leavcd; 

 leaves terete, short; heads 1-2, or several and clustered, globose, many- (10-20-) 

 flowered ; sf-pals lanceolate, awl-pointed, nearly an long as the slender triangular taj^er- 

 pointed pod. (J. Rostkovii, E. Meyer.) Var. MEGACEPHALUS, Ton*. : heads 

 rather numerous and larger, 50-GU-iiowcrcd, crowded in a dense cluster at tho 

 summit of the stout and rigid stem (2 high). Gravelly borders of streams; 

 common, especially northward ; the var. on the sandy shore of Lake Ontario, 

 &c. Rootstocks slender. Quite distinct from No. 6 and No. 7, with which it 

 has been confounded. 



13. J. Coiir&di, Tuckerm. Stems slender (6' -10' high), leafy, branch- 

 ing above into a compound diffusely spreading cymose panicle, bearing chiefly 

 solitary scattered flowers in the forks and along one side of the branches ; leaves 

 tftread-form, the upper slightly knotted ; sc.jKils oblong, acutiah, shorter than the ob- 

 lonf) taper-beaked pod. (J. viviparus, Conrad, so named from a condition in 

 which most of the flowers develop into a tuft of rudimentary or manifest leaves. 

 J. No. 15, Muhl. Gram. ? and therefore J. Muhlenbergii, Spreng. 9) Wet sandy 

 places, Canada and Wisconsin ? N. New England to Virginia, and southward, 

 chiefly near the coast. Rootstocks slender. 



# * * * Leaves knotless : inflorescence terminal. 

 t- Heads cymose-panicled : leaves flat and open : stamens 3. 



14. J. niargiuatus, Rostk. Stem leafy, erect, flattened (l-3 high) ; 

 haves linear, grass-like, nerved ; heads globose, 3 - 8-floAvered ; sepals oblong, 

 the 3 outer with the bracts slightly awned, the inner obtuse and pointless, a3 

 lonjr as tho globular pod ; seeds minutely pointed at both ends. ( J. aristulatus, 

 Michx.) Moist sandy places, S. New England to Illinois, find southward 

 July. Sepals soft, chestnut-purplish, with a green koei- 



