CYPERACEAE |.173 
2. F. longa Chapm. Perennial, the s loosely tufted or gregarious, 8—15 
dm. long, Sus reclining: leave es various, the lower ones mere sheaths, the 
upper ones with narrow D ds of the involucre 8-16 mm. long: spike- 
sae ae 10-15 mm. long: seales pubescent, the body 3-4 mm. long, with 
long subulate e "blades of the perianth-seales suborbicular, abruptly 
gu ed, [pe than . lo ong, truncate or subeordate at the base: perianth- 
] 
bri stles shorter ie the sepal-stalks: achene-body obov Hie or oval, barely 
l mm. long.—Low pinelands, Coastal Plain, W Fla. to Mis 
3. F. squarrosa Michx. Annual, 1-3 dm. tall, or rarely taller: leaves glabrous 
or the sheaths of the lower Bue finely hir ute: spikelets usually clustered: 
scales pubescent, the body ovate, the awn Le subulate, one-half as long 
as the ped or more: perianth-seales 3 long or more; blades “elliptic 
or nearly so, each prolonged into a ee slender awn, e d at the base: 
ME -body broadly oval, less t 1 ong.— (Sau MARSH UMBRELLA- 
S.) —Wet, often brackish, grounds ee Plain, Fla. to Mass.; also 
Great Lake Lowland, Ind. and Mie 
4. F. breviseta Coville. Perennial, up to 1 m. tall: leaves finely n 
or quite as long a id body: per acu Ae abou . long; poe: ub 
orbicular or somew eniform, eee tipped, uiia onda the base: 
achene-bod uie ae less than 1 lon F. squa o breviseta 
Coville.]—Moist sandy soil and swamps, Coastal Plain, Fla. to Tex. and N. C. 
5. F. hispida Ell. Perennial, 2-8 dm. tall: pete both the sheaths and the 
blades more or less hirsute: spikelets ae clustered: scales pubescent, the 
body obovate, the awn subulate, nearly or quite as long as the body: perianth- 
scales about 2 mm. long; sat deltoid-ovate, abruptly pointed, truncate or 
val or r i . long. 
the 
. Squarrosa hispida (EIL) Glee 24 IDE and wet p Coastal 
Plain and adj. provinees, Fla. to Tex., Okla. , Ky., and N. J. (or N. Y. 2) 
14. DICHROMENA Michx. Ada ccs herbs with ‘rootstocks. 
Leaves mostly near the base of the stem: blades narrow, attenuate. Spike- 
lets few—several-flowered, or rarely ieee eer crowded in a terminal head 
which is involucrate by a whorl of leaf-like bracts, the bracts often white or 
colored at the base, thus serving to attract insects. Scales rather md im- 
brieate, broad, keeled, white or whitish. Perianth wantin Stamens 3. 
Ovary sessile: style subu late. Stigmas 2. Achene short, atena ne 
turgid, transversely wrinkled, crowned with the broad truncate or decurrent 
tubercle. About 20 species, natives of the warm parts of America.—Spr.—fall. 
—WHITE-TOPS 
Bracts of the involucre 4-6, linear or slenderly attenuate: tubercle truncate on top 
of the achene, 
Leaves filiform above the dilated base: achenes dark; tubercle 
low, blunt. 1. D. floridensis. 
Lenves linear above the dilated base: achenes pale; tubercle 
acute. 2. D. colorata. 
Bráets. of. the involucre 7-10, lanceolate: tubercle decurrent on l 
the sides of the achene. 3. D. latifolia. 
1. D. floridensis Britton. Plant 1—4 dm. tall, the stem slender, often copiously 
tufted:. bracts of the involucre 4-6, slenderly attenuate beyond the dilated 
