JUNCACEAE 285 
exped attenuate, 4—5.5 mm. long: petals similar to the sepals but ud 
longer, nearly twice as long as the narrowly obovo a M stamens 3.—L 
grounds perce provinces, Ala. to Tex., and Ten 
marginatus Rostk. Stem 1. = dm. tall, somewhat bulbous at the base: 
blades of the piis book es 1-3 mm e: heads relatively large, commonly 5—15 
together: sepals o 0 ovate-lan dris e, 2.0-3 mm. long, acute: petals obovate 
or elliptic- er obtuse, i eae longer than the sepals, slightly longer than 
the obovoid pee sule: —Moist grounds, various provinces, Fla. to Tex 
ebr., Ont., ie 
17.. J. aristulatus Michx. Stem 6-12 dm tall, markedly bulbous-thiekened at 
the base (from thick woody rootstocks in J. aristulatus biflorus) : blades of the 
. Basal leaves mainly 3-5 mm. wide: heads rela a small, 20-100: sepals 2-2.5 
(mm. long, acute or bu as slightly mE. than the sepals, obtuse or 
d io ut as long as the obovoid capsule.—Moist soil or meadows, Coastal 
Plai | Pi edmont, and Great Lake Lowland, Fla. to Tex, Mich., and N. Y.— 
M 1 Mex M 
abortivus Chapm. ia em 3-6 dm. tall, pias a stout rootstock: leaf- 
blades o slighty a nodose: panicle-branches filifor sepals laneeolate, 1.5—2 
m. long, à : petals slightly longer ma the sepals, obtuse, shorter than the 
conic - pond. -margins, Coastal Plain, M. Fla. to S. C. 
orreyi A Stem 2-10 dm. tall, from a slender rootstock: pn 
he 
Dum arid 1-2.5 mm. thick: heads * or rarely nn aggregated, s 
passed by the inv eal bract: sepals subulate, 4-5 mm. long: petals bes er 
than the sepals, ze dE capsule barely exceeding | the perianth, = beak 
1-1.5 mm. lon a w grounds and ditches, various pr ovinces, Fla. to Tex., 
Sask., and Mas 
20. J. megacephalus M. A. Curtis. Stem 3-10 dm. tall: pos blades rather 
stout, those of the stem-leaves relatively short: heads 8-12 mm. thick, 1—40, 
scattered: lowest involucral bract almost bladeless: sepals dre 3-3.5 mm 
long: petals shorter than the sepals, less attenuate: eapsule subulate, about as 
long as the sepals.—Wet sandy soil or swamps, usually calcareous, Coastal 
Plain, Fla. to Va. 
21. J. scirpoides Lam. Stem 2-9 dm. tall: leaf-blades terete, 2-3 mm. ias 
the septa complete: heads globose, not lobed (or lo pi id sepals about 2 m 
long, and capsule about 2.5 mm. long in J. scirpoides us): sepals Pub 
late-lanceolate, about mm. dd petal slightly ite te ee ant sepals: cap- 
sule slender, mostly 4-5 m ong, thus much exceeding the perianth.—Riv 
anks, moist ET ecu e Sw D ‘Coastal Plain and Great Lake Lowland, 
Fla. to Tex., Ind., "eur 
22. J. p Miehx. Stem mainly 8-il dm. tall: leaf-blades flat, 3-8 
mm. broad, the septa incomplete: sepals lanceolate, 3—4 mm. lon ng: ‘petals 
slightly shorter and more attenuate: beak of the capsule a aea exserted~ —Ponds 
and dit e Coastal Plain, Fla. to Tex. and Va.—The spongy leaves are evi- 
deu equitant. 
23. J. validus ager Stem 4-10, dm. tall, compressed: leaf- blades p 
compressed, 2-4 mm. wide, aris complete: heads scattered: sepals subulate- 
lanceolate, 'attenuate, 3.5-5 mm. long: petals much shorter than the sepals: 
capsule subulate, mueh exe En. the. perianth — Sandy soil, Coastal Plain and 
Uca adj. provinces, Miss. to a ex. and Mo. 
24. J. brachycarpus Engelm. Ste 2-9 da tall, terete: leaf-blades terete, 2 
mm. thiek or less: heads scattered or xis solitary: sepals subulate-lanceolate, 
