482 JUNCACE2E. (RUSH FAMILY.) 



rery acute, one third or one half the length of the prismatic triangular and at* 

 ruptly acute pod ; seeds tail-pointed at both ends. ( J. sylvaticus, Muhl. J. Can- 

 adensis, Gay.) Peat-bogs, and sandy borders of ponds. Pods turning deep 

 chestnut-brown. Tails shorter than the body of the seed. 



- - Stamens 6. (Heads chestnut-colored: the pods becoming blackish or brovm, and 

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



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

 slender leaves slightly compressed; panicle spreading; heads 2 - ^-flowered ; sepals 

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

 than the ovate-oblong triangular abruptly mucronate-pointed pod. ( J. lamprocarpus, 

 Ehrh., &c.) Var. PELOCARPUS (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 : tho 

 genuine European form received from Mr. Olney and Dr. SartwelL (Eu.) 



11. J. HlilitariS, 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 - lO-JJowered ; sepals lanceolate, sharp-pointed, as long as 

 the 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. nodosus, L. ! Stem erect, slender (6' -15' high), 3-5-leaved; 

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

 Jlowered ; sepals lanceolate, awl-pointed, nearly as long as the slender triangular taper- 

 pointed pod. (J. Rostkovii, E. Meyer.) Var. MEGACPHALUS, Torr. : heads 

 rather numerous and larger, 50 - 60-flowered, 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. Coiiradi, Tuckerm. Stems slender (6' -10' high), leafy, branch- 

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

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

 thread-form, the upper slightly knotted ; sepals oblong, acutish, shorter than the ob- 

 long 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. ?) Wet sandy 

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

 chiefly near the coast. Rootstocks slender. 



%%.%%. Leaves knotlpss : inflorescence terminal. 

 *- Heads cymose-panicled : leaves Jlat and open : stamens 3. 



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

 leaves linear, grass-like, nerved ; heads globose, 3 - 8-flowered ; sepals oblong, 

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

 long as the globular pod ; seeds minutely pointed at both ends. ( J. aristulatus, 

 Michx.j Moist sandy places, S. New England to Illinois, and southward. 

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



