459 
2. BE. compressum Lam. Leavesspreading (5 to 12cm. long), usually shorter than 
the sheath, grassy, awl-shaped, rigid (thin when submersed), tapering gradually to 
a sharp point: scape (2 to 9 dm. high) 10-ribbed: scales of the involucre very 
obtuse, turning lead-color: bracts obtuse. (FE. gnaphalodes Michx.)—Ponds and 
streams. 
3. BE. Koérnickianum Van Heurck & Miill. Leaves smooth, short, linear (16 to 
22 mm, long, 2mm. wide at base): scapes numerous, 10 to 12 em, high, setaceous, 
compressed, 2 or 3-angled, with loose sheaths as long as the leaves: heads ovoid- 
globose, 3 em. long: involucral scales dusky, broadly obovate, denticulate.— East- 
ern Texas. 
** Receptacle harry. 
4. EB. decangulare L. Caudex short and thick (2.5 to 5 cm. long): leaves obtuse, 
varying from linear-lanceolate to linear-subulate, usually much longer than the 
sheaths, 1.5 to 5 dm. high, rather rigid: scapes 10 to 12-ribbed, 3 to 9 dm, high, 
stout: head hemispherical, becoming globular (4 to 14 mm, broad): seales of the 
involucre acutish, straw-colored or light brown: bracts pointed, dentate at apex.— 
Swamps, extending from the Atlantic and Gulf States to Texas. 
>. BE. Texense Kirn. Leaves acuminate, a little shorter than the sheaths, 2.5 to 
5 em. long: scapes 20 to 25 em. high, 6 or 7-ribbed, slender: heads hemispherical, 2 
to 4 mm. broad: involucral scales obovate or nearly orbicular, entire, straw-colored: 
bracts cuneate or obovate, fimbriate.—Texas. 
CYPERACER. (SEDGE FAMILY.) 
Grass-like or rush-like herbs, with fibrous roots, mostly solid stems, 
closed sheaths (stem-leaves when present 3-ranked), and spiked chietly 
3-androus flowers which occur one in the axil of each of the glume- 
like imbricated bracts and destitute of any perianth or with hypogynous 
bristles or scales in its place, one-celled ovary with a single ovule and 
becoming an achene, 2-cleft style with fruit flattened or lenticular, or 
3-cleft style and fruit 3-angular. 
I, Flowers all perfect (abortive stamens or pistil rare): spikes all of one sort, 
Tribe I, Spikelets mostly many-flowered, with only 1 (rarely 2) of the lower 
scales empty.—ScIRPE.E. 
* Spikelet scales strictly 2-ranked, conduplicate and keeled. 
+ Flowers destitute of bristles and of beak to achene: inflorescence terminal, 
1. Cyperus. Spikelets few to many-flowered, usually clongated or slender. 
2. Kyllinga. Spikelets one-tlowered (but of 3 or 4 scales), glomerate in a sessile 
head. 
+ + Flowers with bristles: achene beaked: inflorescence axillary. 
3, Dulichium. Spikelets 6 to 10-flowered, slender, clustered on an axillary ped- 
unele. 
* * Seales of the several to many-flowered spikelet imbricated all round. 
+ Achene crowned with the bulbous persistent base of the style (usually deciduous 
in Fimbristylis): flowers without inner scales, 
++ Hypogynous bristles (représenting perianth) generally present: stem naked, 
4. Bleocharis. Spikelet solitary, terminating the stem: stamens 3. 
++ ++ Bristles always none: stem leafy. 
5. Dichromena. Spikelets crowded into a leafy-involucrate head, Jeterally 
flattened: many of the flowers imperfect or abortive. 
6. Fimbristylis. Spikelets in an involucrate umbel: stem leafy at base: style 
usually wholly deciduous, 
