OBDEE 155. CYPERACE^E. 741 



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

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

 brownish- white. Sandy banks, N. Eng. to Perm., Ky. and S. States. (Isolepia, 

 Schrad.) 



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

 late, imbricated all around ; interior scales 2, thin, subequal, 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 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 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. (Kyllingia MX.) 



10. 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. U 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. ve'ry long. (No. 3.) Spikes 2 only, lateral. (No. 4). Nos. 8, 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 j stam. 2 or 3 ; style fringe- pubescent ; ach. whitish, min- 

 utely dotted. Marshes, N. Y. to Fla, W. to I1L (Lapham). Jl. Sept. (F. caa- 

 taneus MX.) 



/3. FERRUGINEA. Umbel of many rays, somewhat compound. (F. ferruginous 

 VahL) 



2 P. lax a Vahl. Culm 2 to 12' high, flattened, striate; Ivs. flat, 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 ; 

 starAen 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 1 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. Fla. (Chapman). 



11. TRICHELOS^TYLIS, Listiboudois. (Gr. rp^T/Ao?, threefold, 

 Grvkog ; 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. 11 Sts. leafy at the base. Spikes in a terminal 

 head or umbel. 



| Spikes in a compound umbel, oblong, ferruginous Nos. 1, 2 



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



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, caespitous, leafy at base, 310' 



