139 C. laevigata Smith. Spike one and erect, sometimes 2; spikes 2 - 3. oblong, bracteate, pedunculate, nodding; perig. ovate-lanceolate, triquetrous, nerved, rostrate, bifurcate, subdense-flowered, about equal to the ovate, cuspidate glume; st. 1 - 2f, scabrous above, leafy towards the base. - Light green. Near Boston (Green). Rare. This and the last probably introduced from Eur. (C. Greeniana Ed. 1.)

140 C. flexilis Rudge. (B. t. 79). Spikes 2 - 4, ovate-oblong, cylindric, nodding; perig. ovate, subconic, rostrate, bidentate, scarcely shorter than the ovate, obtusish, oblong glume; st. 12 - 18', erect, striate; lvs. short, and shorter below; lvs. and bracts ciliate. - Bright green. Oneida Co., N. Y. (Gray), and far westward. (C. castanea Wahl.)

141 C. vemista Dew. (B. t, 123.) Spike long, slender, with oblong, obtuse, tawny glumes; spikes 2 or 3, long-cylindric, rather loose-flowered, lowest distant, on a long, exsert stalk, often sparse-flowered, recurved, dark; perig. conic above, tapering below into a pedicel, short-beaked, 2-toothed, veined, rough-pubescent, twice longer than the ovate, obtuse (sometimes mucronate) glume; culm 1 to 2f, longer than the linear-lanceolate, light green leaves. - S. Car. to Fla.

142 C. tenax Chapm. (Boott. t, 59.) Spike short, cylindric, with oblong, acute glumes; spikes 2 or 3, ovate or oblong, dense, subsessile, the lower sometimes remote; perig. oval, triquetrous, some tapering below, conic-beaked or shorter and 2-toothed, finely striate, pubescent, twice longer than the narrow-ovate, acute glume; culm If, erect: lvs short, flat, both glabrous. - Ga, Fla. (C. Chapmanii Sartw.)

143 C. Richardsonii R. Brown. Spike oblong, erect, stalked, with ovate, obtuse, brown, white-bordered glumes; spikes 1 to 3, smaller, oblong, lax, the upper near, the lowest more remote, all longer than the broad, membranous, white, obtuse bract; perig. ovate-triquetrous, very obtuse, scarcely beaked, orifice entire, boelow tapering, pubescent, scarcely equal to the brown, ovate, acute, white-edged glume; culm 4 to 10', scabrous, longer than the scabrous leaves. - Woods, Greece, N. Y. (Bradley), I11. (Mead.), and Arc. Am. A fine species with a wide range.

144 C. dasycarpa Muhl. (B. t., 57.) Spike oblong, erect, subscssile, small; spikes 2 or 3, short-oblong, alternate, hoary, the lowest remote, bracts longer than the culm; perig. oblong-ovate, triquetrous, short-beaked, veined, dense-vil-lous, emarginate at orifice, longer than the ovate-acuminate glume; culm 8 to 14', triquetrous, glabrous, longer than the hairy, narrow-lanceolate lvs.; grayish green. - Dry fields, N. Car.' to Fla.

145 C. Michigansis Dew. Terminal spike staminate, oblong-clavate, erect, short stalked; spikes 1 to 3, rarely 4, oblong-filiform, lax, some or all three stam. at apex, squarrous-bracted, the upper sessile, lower short-stalked; perig. (too young) oblong-obovate, lance, acute, bifid, some villous, shorter than the oblong, acute, rusty brown gl.; culms clustered, 6 to 14', slender, triq., shorter than the linear, stiff, rough-edged lvs. - Mich. (Wm. Boott, Esq.).

146 C. Torreyi Tuekm. Spike oblong, short ped.; spikes 2 - 3, short, oblong, subsessile, erect; perig. oblong, obovate, very obtuse, glabrous, subtriq. entire at the orifice, subrostrate, twice longer than the acute gl.; st. 12 - 18' erect, triq., with subradical and pubescent lvs. - Pale green. N. Y. (Tuckerman.)

147 C. Crawei Dew. Spikes 3 - 6, cyl. short and thick, densely flowered, sometimes aggregated, sometimes remote, the lowest often subradical and long-ped.; perig. ovate, terete, scarcely rostrate, diverging, entire at the orifice, twice longer than the ovate and obtusish gl.; spike with one or two small ones at its base. - Jeff. Co., N. Y. It commemorates the name of Dr. Crawe, its discoverer, who was soon after drowned, on a botanical excursion, in Griffin's Bay.

148 C. ignota Dew. Spike cyl., slender, erect, long-stalked, scale-bracted, with oblong, obtusish gls.; spikes 2 or 3, oblong, lax, erect, leafy-bracted, the lowest long-ped.; perig. elliptic-triq., tapering below, conic-rostrate, slender, entire at the orifice or slightly 2-toothed, recurved more or less, a little longer than the ovate, acute, lane, or cuspidate gl; culm 18 to 24', pale green. - La. (Hale).

β. fusiformis. A smaller form; perig. more spindle-form, and the glume acute, shorter in proportion. Fla. (C. fusiformis Chapman.)

149 C. scabrata Schw. Spike short-stalked; spikes 3 - 6, cyl, subrecurved, remotish, long-ped.; perig. ovate-oblong, subinflated, subbifid, rostrate, quite scabrous, longer than the ovate-lane, acuminate, short-bidentate, ciliate gl.; culm 1 - 2f, acutely triq., rough, above, longer than the lvs. towards the base. - Bright green. Along brooks and streams, common. N. States, N. Car. (Curtis).