OHDEE 155. CYPERACEJ3. 741 



tog like a continuation of the scape, thrice longer than the other; glumes oo, 

 with a- short, recurved or squarrous point, finally brown ; ach. minute, of a dull, 

 brownish-white. Sandy banks, N. Eng. to Penn., Ky. and S. States. (Isolepis, 

 Schrad.) 



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

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

 the 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. maculata Torn 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 aggregated ; 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. (Kylliugia MX.) 



10. FIMBRISTYLIS, Vahl. (Lat. fmbris, 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. 14 With the habit of Scirpus. Lvs. mostly radical. 



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



Spikes in a dense head. Invol. very long. (No. 3.) Spikes 2 only, lateral. (Xo. 4).Nos. 3, 4 



1 F. spadicea Vahl. Culm 1 to 3f high, hard and rigid, flattened, channeled; Ivs. 

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

 late Ivs. 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; stain. 2 or 3 ; style fringe- pubescent ; ach. whitish, min- 

 utely dotted. Marshes, N. Y. to Fla, "VV. to 111. (Lapham). Jl. Sept. (F. cas- 

 taneus MX.) 



p. FERRUGINBA. Umbel of many rays, somewhat compound. (F. ferruginous 

 Vahl.) 



2 F. laxa Vahl. Culm 2 to 12' high, flattened, striate; Ivs. fiat, linear, glaucous, 

 rough-edged, 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 to 8 prominent ridges 

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

 Torr.) 



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

 pressed; Ivs. radical, filiform, as long as the culms ; 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-cleft, ciliolate ; ach. white minute. Ga ! to La. (F. 

 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. Fia. (Chapman. It is Hemicarpha subsquarrosa Nees.) 



11. TRICHELOS^TYLIS, Listiboudois. (Gr. rpi^Aof, threefold, 

 orvkog ; 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. 14 Sts. leafy at the base. Spikes in a terminal 

 head or umbel. 



Spikes in a compound umbel, oblonsr, ferruginous Nos. 1, 2 



g Spikes in a subsimple umbel, 2 to 4 to 6, chestnut colored No. 3 



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



Spike solitary, greenish, lateral near the summit of the culm No. 6 



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



