* Oedee 155.— CTPERACKSl 741 



ing like a continuation of the scape, thrice longer than the other ; glumes Oo, 

 ■with a short, recurved or aquarrous point, finally brown ; ach. minute, of a duU, 

 bro-vraish-white. — Sandy banks, N. Bng. to Penn., Ky. and S. States. (Isolepis, 

 Sohrad.) 



9. LIPOCAR'PHA, Brown. Spites many-flowered ; glumes spatu- 

 late, imbricated all around ; interior scales 2, thin, subequal, involving 

 th# flower and the fruit ; perianth none ; stamens 1 ; style 2 or 3-fid ; 

 achenium coated with the scales. — Culms leafy at base. Spikes numer- 

 ous, collected into an involucrate, terminal head. 



L. maoulkta Torr. Culms triangular, 3 to 8' high, longer than the narrowly 

 linear, often involute, smooth leaves ; invoL of 2 long Ivs. and 1 short one, spikes 

 3 or 4, ovoid, acute, closely aggi-egated ; glumes very numerous, acute, narrowed 

 to the base, white hyaline, marked with red dots, green along the midvein, longer 

 than the 2 interior scales (spikelet) ; stamen 1 ; style bifid, longer than the tawny, 

 oblong achenium.— Wet grounds, Ga. to Fla. (Kyllingia Mx.) 



iO. FIMBRIS'TYLIS, Vahl. (Lat. fimbris, a fringe, stylus, style ; 

 from the ciliate style.) Glumes imbricated on all sides ; bristles ; 

 style compressed, 2-cleft, bulbous at base, deciduous, often ciliate on the 

 margin. — H With the habit of Soirpus. Lvs. mostly radical 



§ Spikes in a subsimple umbel, rusty brown, few, as thick as a pepper-corn Nos. 1, 2 



I Spikes in a dense bead. Xnvol. very long. (No. 8.) Spikes 2 only, lateral. (No. 4). Nos. 3, 4 



1 P. spadicea Tahl. Culm 1 to 3f high, hard and rigid, flattened, channeled; lvs. 

 semi-terete, filiform, channeled ; umbel of few rays, longer than the 2 or 3 subu- 

 late lvs. of the invol. ; spikes few, ovoid-oblong becoming oblong-cylindric, when 

 old, 3 to 6" long, 2" thick; glumes broad-ovate, mucronate, rust-colored, finally 

 dark chestnut brown ; stam. 2 or 3 ; style fringe-pubescent ; ach. whitish, min- 

 utely doited. — ^Marshes, ¥. T. to Ma. "W. to 111. (Lapham). Jl. — Sept. (P. cas- 

 taneus Mx.) 



/3. FEEEUGiNBA. TJmbel of many rays, somewhat compound. (P. ferrugiueus 

 Vahl.) 



2 F. laxa Vahl. Culm 2 to 12' high, flattened, striate; lvs. fi,at, linear, glaucous, 

 roughredged, shorter than the culm ; umbel few-rayed, shorter than one of the 

 leaves of the involucre ; spikes ovoid, acute, 3" long ; glumes ovate, brown ; 

 stamen 1 ; sty. dark purple, fringed ; ach. whitish, with 6 <o 8 prominent ridges 

 lengthwise. — Clay soils, Penn. to III and S. States. Jl. — Sept. (P. Baldwinii 

 Torr.) 



3 F. argentea Vahl. Glaucous; culms tufted, 2 to 4' high, setaceous, com- 

 pressed; lvs. radical, fihform, as long as the cukns ; spikes 5 to 8 cylindric-oblong, 

 acute, sessile, straw-colored, in a dense head; invol. 3 or 4-leaved, many times 

 longer than the head, usually longer than the culm ; glumes 20 or more, lance-ovate, 

 mucronate ; stam. 1 ; sty. 2-cleit, ciliolate ; ach. white minute. — Ga I to La. (P. 

 congesta Torr.) 



4 F. distachya Chapman? Culms setaceous, leafless, tufted, 3 to 4' high ; 

 spikes 2, globular-ovoid, lateral, sessile near the top of the culm, 1'' long, dark 

 brown; glumes very numerous; sty. 2-cleft; ach. minute, but as long as the 

 glume. — Mid. Pla. (Chapman). 



H. TRICHELOS'TYLIS, Listiboudois. (Gr. TpixriXog, threefold, 

 (TTvAo? ; from the character.) Glumes in 4 to 8 ranks, carinate ; bris- 

 tles none ; style 3-cleft, deciduous below the bulb (if any) at the base ; 

 achenium triangular. — U Sts. leafy at the base. Spikes in a terminal 

 head or umbel. 



S Spites in a compound umbel, oblong, ferruginous Nos. 1, 2 



e Spikes in a subsimple umbel, 2 to 4 to 6, chestnut colored. No. 8 



S Spikes in a dense head, greenish. Involuove leaves dilated at base Nos. 4, 5 



I Spike solitary, greenish, lateral near the summit of the culm Ho. 6 



1 T. autumnSlis. Culm compressed, 2-edged, csespitous, leafy at base, 3 — 10' 



