Oboes 155.— CYPERACB^E. 741 



ing like a continuation of tho scape, thrico 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. (IsolepLa, 

 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. 



Ij. maculata Torr. Culms triangular, 3 to 8' high, longer than tho narrowly 

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

 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 ; stylo bifid, longer than the tawny, 

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



10. FIMBRIS'TYLIS, Vahl. (Lat. jimbris, a fringe, stylus, stylo; 

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

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

 margin. — 11 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 bead. Invol. very long. <No. 3.) Spikes 2 only, lateral. (No. 4). Nos. 3, 4 



1 F. spadicea Vahl. 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 dolled. — Marshes, JST. Y. to Fix TV. to I1L (Lapham). Jl. — Sept (F. cas- 

 taneus Mx.) 



/3. ferruginea. Umbel of many rays, somewhat compound. (F. ferrugineus 

 Vahl.) 



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

 rough-edged, shorter than the culm; umbel few-rayed, shorter than one of tho 

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

 stamen 1; sty. dark purple, fringed; ach. whitish, with {J to 8 prominent ridges 

 lengthwise. — Clay soils, Penn. to 111. and S. States. Jl. — Sept. (F. Baldwinii 

 Torr.) 



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

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

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

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

 mucronate; stam. 1; sty. 2-cleft, ciliolate; ach. white minute. — Gal to La. (F. 

 congesta Torr.) 



4 F. dist&chya Chapman? Culms setaceous, leafless, tufted, 3 to 4' high; 

 spikes 2, globular-ovoid, lateral, sessile near the top of tho 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. TpifflXoc; threefold, 

 ctvXo^ ; 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. — 'H Sts. leafy at the base. Spikes in a terminal 

 head or umbel. 



§ Spikes in a compound umbel, oblons, ferruginous.... Nos. 1,5 



§ Spikes in s. subsimple umbel. 2 to 4 to 6, chestnut colored No. 8 



| 8pikesin a dense head, greenish. Involucre leaves dilated at base Nos. 4, 5 



| Spike solitary, greenish, lateral near tbe summit of the culm No. 8 



1 T. autumnalis. Culm compressed, 2-edged, ca;spitous, leafy at base, 3 — IV 



