568 CLX. CYPERACES. Fuirena. 
terior glumes; stamens 3; style 3-cleft; achenium triangular—% 
Halit of Cyperus. 
1. M. ovunaris. Vahl. (Cyperus. Gron. Torr. Scirpusechinatus. Linn.) 
St. triquetrous, nearly naked, 1—2f high; dvs. shorter than the stem, 
nearly smooth; wmbel simple; rays 3’’—2’ long; hds. 1—5, globose, 1 sessile, 
the rest on the spreading rays; spikelets linear-subulate, 6’ long, 50—100 in 
each head; fls. 2—4, 1—2 fertile ; invol, 3—4-leaved, outer leaves very long.— 
Bogs and low grounds, Middle and Western States, common. Aug., Sept. 
G. tenellus. Torr. Slender and cespitose ; Ads. ovate, small. 
y. cylindricus. Torr. Hds. oblong, cylindrical. 
2. M. rerroractus. Vahl. (Scirpus. Linn.) 
St. obtusely triangular, nearly leafless, pubescent, 2—3f high; dvs. pu- 
bescent, 3—4” wide, about half as long as the stem; wmbels simple; rays 
unequal, long, 6—8; invol. 3—5-leaved; bracts unequal, not longer than the 
rays; spikelets 70—100, subulate, 1-flowered, finally sg imbricate into 
obovate heads; 2 lower glumes empty.—A rare species, Middle and Western 
States. Aug., Sept. 
4. KYLLINGIA. 
In honor of Peter Kylling, a Danish botanist. 
Spikelets compressed ; scales about 4, the two lowest short and 
empty, the third only usually with a fertile flower; stam. 1—3; 
style long, 2-cleft ; achenia lenticular.—Stems triangular. Hads. ses- 
sile, solitary or aggregated, involucr ate. 
1. K. pumita. Michx. 
Cespitose ; st. 2—12’ high, slender; Jvs. mostly radical, shorter than the 
stem, smooth; Ads, generally solitary, sometimes triple, closely sessile, oval or 
oblong; invol. 3-leaved, 1—2’ long; spikelets 1-flowered, very numerous. about 
2” long; the lowest glume or glumes very small; sta. always 2; ach. lens- 
shaped, fulvous.—Wet banks, Columbus, Ohio (Sullivant!) Ky. (Short) ana 
Southern States. 
2. K. MONOCEPHALA. 
St. slender, 10—15’ high, leafy at base; Jvs. much shorter than the stem, 
1” wide; Ad. simple, globose, dense, inclining; invol. 3-leaved, the highest 
leaflet erect; spikelets numerous, 1-flowered; two lower glumes minute, two 
upper striate, subequal, serrulate, ciliate on the keel.—Mass., N. Y. to Ga. 
Trire 2. HYPOLYTREZ. 
5. FUIRENA. Rottboll. 
In honor of George Fuiren, a Dutch botanist. 
Glumes awned, imbricated on all sides into a spike; petaloid 
scales 3, cordate, awned, unguiculate, investing the achenium.—% 
St. angular, leafy. Spikes subumbeled, axillary and terminal. 
1. F. squarrosa. Michx. 
St. 1—2f high, obtusely triangular, sulcate; dvs. ciliate, shorter than the 
stem ; sheaths hispid-pilose ; spikes clustered, ovate, mostly terminal, 6—12; 
auwns nearly as long as the glumes; petaloid scales ovate, cuspidate with a short 
aby ach. twice the length of the stipe——Bogs and swamps, N. J. to Car. 
ept. ; 
2. F. pumiva. Spr. (F. squarrosa. @. Torr. 
St. pubescent above, 3—6’ high; lvs. linear-lanceolate, flat, striate, as 
long as the stem; spikes 1, 2 or 3, thick, subtended by 2—3 long, involucrate, 
unequal leaves; glumes ovate-lanceolate, with short awns; petaloid scales ovate- 
lanceolate; ach. pedicellate, with retrorsely hispid sete. Wet, sandy places. Aug. 
