Mariscus. CLX. CYPERACER. ; 567 
* * Spikelets irregularly inserted all arownd the rachis. 
9. C. Scuweinirzit. Torr. Scheinitz’s Sedge. 
St. 8—12/ high, triquetrous, rough on the angles; dvs. shorter than the 
stem, about a line wide ; wmbel simple, erect, 4—6-rayed, rays elongated, une- 
qual; sheaths truncate, entire; invol. 3—5-leaved, longer than the leaves, sca- 
brous on the margin; spikelets 6—7, alternate, approximate, 6—8-flowered, with 
a small, setaceous bract at the base of each; scales membranaceous on the 
margin; sta. 3; sty. 3-cleft, scarcely longer than the smooth achenia.—Shore 
of L. Ontario, Sartwell, of Lake Erie, Sullivant! to Ark. 
10. C. ERUTHRORHIzos. Muhl. Red-root Sedge. 
St. 2—3f high, obtusely triquetrous, longer than the leaves; wmbel com- 
pound; rays 5—9, 3—4’ long, each with 3—4 sessile spikes; sheaths entire; 
spikelets very numerous, 6” long, crowded and spreading in the spikes, a little 
flattened, about 13-flowered; owter glumes mucronate, closely imbricated, chest- 
nut-brown, veinless and shining, the inner ones entirely free from the rachis; 
sta. 3; ach. smooth and shining, much shorter than the glume.——Wet grounds. 
Penn. and Southern States. 
* * * Spikelets more or less aggregated in terminal masses. 
11. C. rimicutmis. Vahl. (C. mariscoides. Bae 
St. slender, almost filiform, tuberous at base, 8—12/ long, leafy only at base ; 
lvs. mostly radical, carinate ; wmbel simple and sessile, or with 1 or2 rays; spike- 
lets linear-lanceolate, 3—8-flowered, flattened when old, collected into globose 
heads; glumes remote, loose, ovate, yellowish.—Dry, rocky hills, N. Eng.! to 
Flor., W. toIll.! Aug. 
12. C. Grayu. Torr. : 
St. 8—12’ high, filiform, obtusely triangular, erect, tuberous at base; ls. 
radical, channeled, about 4’ wide; umbel 4—6-rayed, capillary, erect, spread- 
ing; sheaths truncate; hds. loose, of 6—8 spikelets ; spzkelets linear, compressed, 
8—7-flowered ; scales ovate, veined, obtuse, imbricated, interior ones lanceolate ; 
sta. 3; sty. 3-cleft ; ach. obovate-triquetrous, 3 the length of the scale, gray, dot- 
ted.—Sandy fields, Mass., Oakes, L. I., Kneiskern, N. J., Torrey. Sept. (Dr. 
Sartwell comm.) 
13. C. pentratus. Torr. 
St. about 1f high, leafy at base, triquetrous; Jvs. a little shorter than the 
stem, strongly keeled ; wmbel compound, 6—10-rayed; invol. of 3 unequal leaves, 
one of them longer than the umbel; spikelets 3 on each peduncle, 3—7” long, 
ovate, flat, 8-flowered ; glwmes acute, spreading at the points, giving the spike- 
lets a serrated appearance; sty. 3-cleft; ach. triangular.—2| Swamps, N. Eng. ! 
and Middle States. 
14. C. inFLtexus. Muh. 
St. setaceous, leafy at base, 2—3' high; lvs. equaling the stem; wmbel 
2—3-rayed, or conglomerate and simple; invol. of 3 long leaves; spikelets ob- 
long, 8—12-flowered, 10—20 together, densely crowded into the ovoid heads; 
glumes yellowish, veined, squarrose-uncinate at tip: sta. 1—Banks of streams, 
Free States! and British Provinces: <Aug., Sept. 
15. C. acuminatus. Torr. & Hook. 
Sé. 5—10’ (8—4’ Torr.) high, slender, obtusely triquetrous; lvs. erect, 
radical, as long as the stem ; wmbel 1—6 (1—2 Torr.)-rayed ; invol. 3—4-leaved, 
very long; rays unequal, each with a globose head of 15—40 spikelets; spike- 
lets 3—11’’, oblong-linear, obtuse, 15—25-flowered ; fls. very regularly imbri- 
cated in 2 rows; glumes acute, with the point recurved; sta. 1; ach. dull-gray- 
ish—Ill. Mead! Mo. Drummond. 
3. MARISCUS. Vahl. 
Celtic mar, a marsh ; alluding to the place where some species grow. 
Spikelets subterete, clustered in heads, rarely with but 1 or 2 fer- 
tile flowers ; glumes imbricated somewhat in 2 rows, the lower ones 
short and empty; rachis margined with the adnate, persistent, in- 
48* 
