HeEmMIcaRPHA. CLX. CYPERACEZ. 573 
base ; spikelets 2—4, on short peduncles, nodding ; sete 40—50 to a flower, long, 
white and cottony—Swamps, N. States and Brit. Am. July. 
6. E. Vireinicum. Virginian Cotton grass. 
St. nearly round, leafy, smooth, 2—3f high; lvs. flat, few, long, with 
scabrous margins ; invol. 2—4-leaved, outer leaves much longer; spikelets in a 
sort of umbel, erect, nearly sessile; glumes ovate, brown at the sides; keel 
green; hairs 50—60, reddish-white, long and cottony.—Wet grounds, U. S. 
and Can. 
9. FIMBRISTYLIS. Vahl. 
Lat. fimbris, a fringe, stylus, style ; from the ciliate style. 
Glumes imbricated on all sides; bristles 0; style compressed, 
2-cleft, bulbous at base, deciduous, often ciliate on the margin.—% 
with the habit of Scirpus. 
1. F. BatpwiniAna. Torr. (s cirpus Baldwinianus. Schult. S. ferrugin- 
eus. Darl.)—St. 2—12’ high, compressed, deeply striate, leafy at base; 
umbel mostly simple, 3—4-rayed, central spikelets sessile; invol. subulate, 
2-leaved, as long as the umbel; spikelets ovoid, acute; glwmes ovate, brown; 
sty. bifid, ciliate; ach. white, longitudinally furrowed.—Swamps and damp 
places, Middle, Southern and Western States. July. 
2. F. spapicea. Vahl. (Scirpus spad. Linn. S. castaneus. Michz.) 
St. 1—2f high, hard and rigid, compressed, nearly naked; lvs. 5—6’ 
high, filiform, channeled inside, semi-terete outside, lower ones rust-colored ; 
wmbel of few rays, rather exceeding the 2—3 subulate, involucre leaves; spikes 
ovate-oblong, 3—6” long; glwmes broad-ovate, mucronate, finally of a dark, 
shining, chestnut brown ; sty. conspicuously fimbriate; ach. whitish—lMarshes, 
N. J.to La. Aug. 
10. TRICHELOSTYLIS. Lestiboudois.~ 
Gr. roryndos, three-fold, orvXos 5 from the character. . 
Glumes in 4—8 ranks, carinate ; bristles 0; style 3-cleft, decidu- 
ous below the bulb at the base ; achenium triangular.—% Stems leafy 
at the base. Spikes usually in terminal umbels. 
1. T. mucronuLatus. Torr. (Scirpus muc. Michz. Fimbristylis autum- 
nalis. R. g S.)—St. compressed, 2-edged, czespitose, leafy at base, 3—10/ 
high ; lus. flat, linear, shorter than the stem; wmbel compound; invol. 2-leaved ; 
spikelets lanceolate, acute, somewhat 4-sided, 2—3 together; glwmes brown, 
mucronate; ach. white——Wet places, along rivers, &c., N. Eng.! to Ga., W. 
to Mo. July. 
2. T. capmnuanis. Wood. (Scirpus. Linn. Isolepis. R. g S.) 
St. czespitose, nearly naked, 3-angled, capillary, 4—8’ high; lws. subradi- 
cal, setaceous, shorter than the stem; spikelets ovoid, 2—4, pedunculate, inner 
one sessile; glumes oblong, ferruginous, margin pubescent; ach. white.—In 
sandy fields, Mass. to Car., W. to Ky. and Ohio. Aug. 
ll. HEMICARPHA. Nees. 
Gr. ipicvrs, half, kapga, straw or chaff? 
Glumes imbricated all around; bristles 0; stam. 1; style 2-cleft, 
not bulbous at base, deciduous ; achenium compressed, oblong, sub- 
terete—%4 Spikes glomerate. 
H. squarrosa. Nees. (Isolepis subsquarrosa. Scirad. Scirpus subsq. 
Muhl. S. minimus. Ph.)—Scape setaceous, compressed, sulcate, recurv- 
ed, 2—3’ high; lvs. setaceous, shorter than the scape; spikes 2—3, terminal 
(apparently lateral), subsessile, ovoid, nearly 2’ long; invol. of 2 bracts, one 
appearing like a continuation of the scape, thrice longer than the other ; glwmes 
00, with a short, recurved or squarrose point, finally brown; ach. minute, of a 
dull, brownish-white.—Sandy banks, N. Eng.! to Penn. and Ky. | 
