150 C. subulata Mx. Spike erect, small, short, with lane., white gl.; spikes 3 to 5, oblong, 3 to 7-fruited, distant, sessile above, the highest close to the staminate, the lower exsert-ped., leafy-bracted, sometimes at apex; perig. subulate or lance-ovate, long, rostrate, slender, veined, glabrous, with 2 curved teeth divaricate or reflexed, more than thrice longer than the white, lanc, gl; culm 6 to 14 to 24' high, very slender, lax, smooth; lvs. smooth, striate, flat, shorter than the culm; very light green. - Can. to N. J., along the coast.
151 C. pallescena L. Spikes 2 - 3, oblong, short, cyl., distant, yellowish green, nodding towards maturity; perig. oval, obtuse, round, about equal to, or a Utile shorter than, the ovate, pale gl; st. 6 - 16', hardly erect; bracts sometimes transversely rugous. - Plant often subpubesceut, and of a light green. In dry meadows. Common. - C. undulata Kunze, is admitted by Kunze himself to be only var., differing chiefly in its wavy, lowest bract.
152 C. limosa L. Spikes 1 - 3, ovate or oblong, long-ped., subloose-flowered, smoothish, pendulous; perig. elliptic, compressed, very short-rostrate, entire at the orifice, about equal to the oblong and obtuse, or ovate, cuspidate, rust-colored gl.; calm 8 - 16', ascending, obtusely triq., with subradical flat and narrow lvs. - Glaucous green. Marshes, common.
153 C. irrigua Smith. Spikes 2 - 3, ovate-oblong, thickish, nodding; perig. roundish-ovate, short-rostrate, subcompressed, shorter than the ovate-lanceolate, chestnut-brown gl.; st. near a foot high, longer than the flat, subcurved lvs.: glaucous. - Spike rarely at the summit, or spikes with stamens at the-base. Marsh. Bridgewater, N. Y. (Gray) also in marshes in Mass. and Mich. (Cooley), rare. (C. limosa, β irrigua Wahl.)
154 C. rariflora Smith. Spikes about 2 linear, quite loose-flowered, long-ped., nodding; perig. ovate, oblong, triqu., depressed, equaling the ovate, subcircinatr. brown gl.; culm 10'. - Glaucous. White Mountains, N. H. (Barratt). (0. limosa β. rariflora Wahl.)
155 C. Barrattii Torr. (B. t. 176.) Spike 1, erect, cyl., long (rarely 2), with ovate, obtuse, dark gls.; spikes 2 to 6, often 1ong-cyl, staminate at apex, the lower on slender, recurved pedicels, upper erect, commonly single, sometimes 2 or 4 from the same bract, purple or dark; perig. ovate or lance-ovate, often with a very short beak, obtuse, slightly diverging, roughish, longer than the ovate dark gl.; culm 1 to 2f, longer than the long, rough leaves; glaucous green. - N J. to N. Car. (Curtis). (C. flacca Carey. C. recurva Huds.)
156 C. milliacea Muhl. Spike erect, slender; spikes 2 - 3, long-cyl., slender, loose-flowered below, nodding; perig. ovate, triq., glabrous, subrostrate, entire at the orifice, longer than the oblong, emarginate or obcordate, awned gl.; st. 12 - 24', slender, scabrous; lvs. linear-lane. - Yellowish green. Wet meadows, common.
157 C. hystricina Willd. (B. t. 152.) Spike rarely pistillate at the summit; spikes 2 - 4, oblong, cyl., attenuate, subdistant, long-bracteate, nodding, rarely sheathed; perig. ovate, diverging, inflated, subtriq., nerved, bifid, glabrous, twice longer than the oblong, emarginate, submucronate gl.; culm 12 - 24', scabrous above, with long, linear-lance, lvs. - Yellowish green. Wet places, very common. (See Sill. Journ., 1848, C. Georgiana.)
β. cooleyi. Spikes short small, spikes often short-ovate, the lowest on a very long (5 to 8'), recurved, filiform peduncle; culm very slender, prostrate, shorter than the long, narrow lvs. - Mich. (Cooley). (C. Cooleyi, Ed. 1.)
158 C. Pseudo-cyperus L. (Schk. fig. 102.) Spike cyl. and elongated; spikes 3 - 4, cyl., long-ped., rather remote recurved-pendulous, with long and leafy bracts; perig. ovate, lanc, bidendate, reflexed, and a little shorter than the ovate-lane, or setaceous gl. - Common about ponds and ditches. It is smaller in all its parts than C. comosa (Boott), the fruit of the latter is deeply and widely bifurcate, and its glume is hispid or ciliate. The two have been confounded in our country, though long known.
159 C. comosa L. (B. t. 36.) Spike long and slender, rarely pistillate above; spikes 2 - 5, long-cyl., pendulous, thick, dense-flowered, with very long and leafy bracts; perig. ovate-lane., acuminate, rostrate, deeply 2-forked, reflexed, triq., glabrous, generally longer than the lane, mucronate, setaceous gl.; culm 18 - 30', large, rough, with long and wide, rough leaves and bracts. Plant very glabrous and yellowish-green. Wet places about ponds and ditches, common. (C. fur-cata Ell.)