29 C. stellulata Good. Spikelets 4 - 6, ovate, romotish, sessile; perig. broad-ovate, contracted into a short beak, compressed, slightly bifid, scabrous on the edge, diverging and reflexed, a little longer than the ovate, obtusish glume; st. erect, stiff, leafy below, 8 - 24' high. - Common in wet places over the Northern States.

30 C. scirpoides Sehk. Spikelets about 4, ovate, approximate, sessile, obtuse, lowest bracteate; perig. ovate, cordate, compressed, lanceolate or rostrate, scabrous on the margin, diverging or horizontal, longer than the ovate-lanceolate, acute glume; st. 6 - 16'high, leafy towards the base. - Wet places in the country. The more lanceolate fruit and glume, and more flexible stem, separate it from the preceding. C. scirpoides has the stamens chiefly below the upper spikelet. (C. stellulata β. Torr. etc.)

31 C. Buckleyi Dew. Spike compounded of about 5 ovate, alternate, approximate spikelets; perig. ovate-lanceolate, 2-lobed at the orifice, concave or flattish below, smooth, about twice longer than the ovate-acute glume; culm about If high, slender, with lance-linear lvs. towards the base; stam. chiefly at the base of the upper spikelets. - Mts. of Car. and Ga. (Buckley.) (C. Gibhardi, Buckl. nee. Sehk.)

32 C. curta Good. Spikelets 4 - 7, ovate-oblong, upper subapproximate, lower often remote; perig. round-ovate, obtusish, diverging, convexo-concave, 2-toothed. slightly scabrous, longer than the ovate, white, hyaline glume; st. 1 - 2f high, usually light green, with silvery or hoary spikelets. - Moist places over the country. (C. Richardi Mx.)

33 C. tenella Ehrh. nee Sehk. Spikelets 3 or 4, ovate, roundish, remote, sessile, few (2 to 6)-fruited; perig. lance-ovate or roundish, rostrate, longer than the ovate, hyaline, white glume; culm 1 to 2f high, slender, flaccid, and with the lvs. green

- N. Eng. and N. Y. Common in wet places. (C, spbserostachya Dew., Ed. 2. C. canescens β. vitilis, Carey. C. vitilis Fries., Ac.)

34 C. Deweyana Schk. (B. t, 69.) Spikelets about 3, sessile ovate-lanceolate, alternate, subremote, highest bracteate; perig. oblong-lanceolate, rostrate, acumi-natc, bifurcate, plano-couvex, 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.

35 C. trispenna Dew. (B. t. 78.) 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, Eng. and N. Y,

36 C. argyrantha Tuckm. M & Spike compounded of spikelets 5 to 8, roundish obovate, alternate, subaggregated above, rounded below, with squarrous bracts, except the lowest, which has a long, leafy point; perig. ovate, compressed, at length spreading, green, many-veined both sides, and winged by a wide margin, lacerated above, glabrous, acuminate in a short, bifid beak, equaling the membran* ous, white, lanceolate, acute glume. - Amherst and Sunderland, Mass. (Tucker-man.) Culm 1 to 3f high, Weak, obtuse-angled, twice longer than the lance-linear leaves.

37 C. tenuiflora Wahl. Spikelets 2 - 3, ovate, clustered, sessile, alternate, lower one bracteate; perig ovate-oblong, acutish, plano-convex, equaling the oblong-ovate, hyaline or white glume; st. a foot or more high, slender, subpros-trate, longer than the flat and narrow leaves. Light green. Spikelets whitish, - Burlington and Salem, Vt, in swamps (Robbins), Oriskany and Ogdensburg, N. Y. (Kneiskern), Southampton, Mass. (Chapman).

38 C. Liddoni Boott. (Illus. 51.) Spikelets 5 - 7, oblong-ovate, closely aggregated; perig. ovate, lanceolate, acuminate, oblique at the orifice, glabrous, margin serrulate, scarcely longer than the ovate-lanceolate glume, which is acute and hyaline on the edges; perig. and glumes rather chestnut brown; plant yellowish-green. - Brit. Am. (Boott.) Mich. (Cooley).

39 C. alata Torr. Spike composed of 4 to 8 spikelets, ovate, large, approximate and sessile; perig. roundish, sometimes obovate, nearly flat and close, abruptly short-beaked, 3-veined on the back, 2-toothed, broadly winged, finally scabrous on the beak, shorter than the lance-ovate glume; culm smooth, 3 to 4f high; lvs. rough-edged and pale green. - N, Car. to Fla.

40 C. straminea Wald. Spike compound, erect; spikelets about 6, ovate, short oblong, alternate, sessile, subapproximate; perig. broad, roundish-ovate, compressed, ciliate-serrate on the margin, acuminate-beaked, 1-veined on the back, 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. (C. festucacea Ell. ? nee Schk.) 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 Will-denow,

β. minor Dew. Spikelets small, 5 - 6, globous or obovate, less approximate; perig. small, ovate, acuminate, less winged, serrulate, about equaling the ovate, acute glume.

41 C. foenea Muhl. Spike compound, 5 to 10 ovate spikelets, aggregated above; perig ovate-acuminate, winged, scabrous-margined, largo and close, 2-toothed, about equal to the oblong-lanceolate glume; culm large and smooth, leafy below; plant glaucous, - Penn. (Muhlenberg) and salt marshes, R. I. (Olney),

42 C. mirabilis Dew. Spikelets 7 - 11, ovate-globous, alternate, sessile, often closely aggregated into a lance-ovoid head, bracteate below; perig. ovate, sublan-ceolate, scabrous on the margin, concave-convex, rostrate, 2-toothed, subdiverg-ing. scarcely twice longer than the ovate, lanceolate glum?; st. 18 - 36, erect, stiff, rough above, rather slender; plant light green. - Common about fences and hedges, and has a specially rigid appearance- (C. festucacea β. Torr. Carey.)