580 CLX. CYPERACEZ. CaREx. 
bracteate ; perzg. oblong-lanceolate, rostrate, acuminate, bifurcate, plano-con- 
vex, slightly scabrous on the margin, a little longer than the ovate-lanceolate, 
awned, hyaline glume; st. 1—4f long, subprocumbent, with radical leaves; 
whole plant yellowish-green—Common in open woods or on the borders of 
woods. 
30. C. TRIsPERMA. Dew. 
Spikelets about 3, remote, sessile, alternate, highest ebracteate; perig. 
ovate-oblong, acute or short-rostrate, plano-convex, at the orifice entire, nerved, 
subscabrous on the edges, somewhat diverging, longer than the oblong, acute 
and hyaline glume; st. 10—24’ high, prostrate or recurved, filiform, slender, 
longer than the leaves.—In tufts in marshes or wet woods; common in N. 
England and N. York. . 
- 
f£. Spikelets oval. 
31. C. scoparia. Schk. 
Spikelets 5—10, usually 5—’7, ovate, sessile, approximate, the lowest with 
a long deciduous bract; perig. ovate, lanceolate, nerved, erect, slightly mar- 
gined, glabrous, longer than the lanceolate, acuminate glume; st. 18—24’ high, 
leafy towards the root.—Moist places, very common. 
B. aggregata. Dew. Spikelets aggregated into a head, somewhat spiral. 
32. C. Lacopopidipes. Schk. 
Spikelets 8—20, cylindric, ovate, rather near, alternate and sessile; perig. 
lanceolate, tapering at both ends, concavo-convex, nerved, bidentate, scabrous 
on the margin, nearly twice as long as the ovate-lanceolate glume; sf. nearly 
2f high, leafy; the whole light green.—Common. 
33. C. sTRAMINEA. Wahl. 
Spike compound, erect; spikelets about 6, ovate, short-oblong, alternate, 
sessile, subapproximate ; perig. broad, roundish-ovate, compressed, ciliate-ser- 
rate on the margin, beaked, 2-toothed, widely winged, commonly shorter than — 
the ovate-lanceolate glume; st. 12—20/ high, longer than the leaves; spikelets 
whitish or tawny.—Common in woods and fields. 
a. brevior. Dew. Spikelets 3—5, often closely approximate, and more nearly 
round; perig. shorter-ovate, and shorter-rostrate, scarcely longer than the ovate- 
lanceolate glume.—This is the plant originally described by Willdenow. 
8B. minor. Dew. Spikelets small, 5—6, globose or obovate, less approximate; 
perig. small, ovate, acuminate, less winged, serrulate, about equaling the ovate, 
acute glume. 
34. C. TeENERA. Dew. (C. adusta. Boott.) ; 
Spike compound, recurved; spikelets about 5, obovate, remotish, alternate, 
sessile, brownish, attenuated below, the lowest bracteate; fr. ovate, compressed, 
somewhat winged, rostrate, nerved, ciliate-serrate, longer than the oblong-lance- 
olate scale; st. 15—30’ high, small and slender, erect, with a nodding spike, 
longer than the leaves.—Light green. Common. - 
35. C. restucacea. Schk. 
Spikelets 5—8, obovate and clubform, sessile and alternate, approximate, 
lower one bracteate; perig. roundish-ovate, rostrate, winged, striate, 2-toothed, 
scabrous on the margin, longer than the ovate, lanceolate glume; st. 15—30’ 
high, erect and stiff, leafy below.—Plant pale green. Spikelets greenish to 
brown. Common in fields, but not abundant. The club-form spikelets from the 
decurrent scales of the ¢ flowers, especially mark this species. ‘ 
36. C. mrraBitis. Dew. 
Spikelets 7—11, ovate-globose, alternate, sessile, often closely-aggregated, 
and stiff-form, bracteate below; perig. ovate, sublanceolate, scabrous on the 
margin, concavo-convex, rostrate, 2-toothed, subdiverging, scarcely twice lon- 
ger than the ovate, lanceolate glume; st. 18—36’ high, erect, stiff, rough above, 
rather slender ; pean light green—Common about fences and hedges, and has 
a specially rigid appearance. 
37. C. cristata. Schw. 
Spikelets 6—14, globose, sessile, closely aggregated into a head of a crested 
form, bracteate ; perig. ovate, oblong, compressed, winged, rostrate-acuminate, 
