376 



CYPERACEAE. 



Vol. I. 



47. Carex Deweyana Schwein. Dewey's Sedge. Fig. 914. 



Carex Deweyana Schwein. Ann. Lye. N. Y. i : 65. 1824. 



Pale green, culms densely caespitose, slender, 

 spreading, slightly angled above, 6'~3° long. Leaves 

 i"-2i" wide, flat, soft, shorter than the culm; 

 bracts bristle- form, the lower commonly elongated; 

 spikes 2-7, gynaecandrous, ovate-oblong or subglo- 

 bose, 3-15-flowered, about 2.\" in diameter, sessile, 

 distinctly separated or the upper ones contiguous; 

 perigynia lanceolate or ovate-lanceolate, nerveless or 

 nearly so, corky at base, 2"-2i" long, sharply mar- 

 gined above, \" wide, the inner face flat, the tapering 

 rough strongly 2-toothed beak about one-half as long 

 as the body; scales nearly white, hyaline with a 

 green midvein, cuspidate or acuminate, equalling the 

 perigynia, or shorter; achenes 1" long; stigmas 2. 



In dry woods, Nova Scotia to British Columbia and 

 Vancouver, south to Pennsylvania, Iowa, New Mexico 

 and Arizona. May-July. 



48. Carex bromoides Schk. Brome-like Sedge. Fig. 915. 



C. bromoides Schk. ; Willd. Sp. PI. 4 : 258. 1805. 



Bright green, culms densely caespitose, slender, 

 erect, very rough above, l°-2° high. Leaves 1" wide 

 or less, flat, soft, equalling or shorter than the culm ; 

 bracts subulate or bristle-form, the lowest com- 

 monly elongated, sometimes overtopping the spikes; 

 spikes 3-7, narrowly oblong-cylindric, 3i"-cj" long, 

 about i¥' thick, erect or ascending, mostly close 

 together, loosely 6-15-flowered, the staminate flow- 

 ers basal, or terminal, or both; perigynia narrowly 

 lanceolate, little-margined above, firm, pale, notice- 

 ably or strongly several-nerved, 2"-2l" long, 4" wide, 

 corky at base, the inner face flat, the tapering rough 

 2-toothed beak at least one-half as long as the body ; 

 scales oblong-lanceolate, green, obtusish to acumi- 

 nate, shorter than the perigynia, brownish-tinged; 

 achenes i" long or less; stigmas 2. 



In bogs and swamps, Nova Scotia to Ontario and 

 Michigan, south to Florida and Louisiana. June-Aug. 



49. Carex exilis Dewey. Coast Sedge. Fig. 916. 



Carex exilis Dewey, Am. Journ. Sci. 14 : 351. 1828. 



Culms densely caespitose, slender or filiform, but 

 tough, stiff, strictly erect, smooth or roughish, io'-2° 

 tall, not stoloniferous. Leaves involute-filiform, usually 

 shorter than the culm; spike usually solitary, terminal, 

 erect, bractless, 3"-i8" long, il"-3" wide, gynaecan- 

 drous, or sometimes androgynous, occasionally quite 

 dioecious, rarely with a small auxiliary spike at its base ; 

 perigynia ovoid-ellipsoid, plano-convex, brownish, about 

 ii" long, I" wide, margined, spongy at base, rather 

 strongly several-nerved on the outer face, faintly few- 

 nerved on the inner, spreading or reflexed at maturity, 

 rounded at base, narrowed into a slender rough 2- 

 toothed beak about one-half as long as the body; scales 

 ovate, acute; usually shorter than the perigynia; 

 stigmas 2. 



In bogs, Labrador to southern New Jersey, mostly near 

 the coast. Rarely inland in Vermont, New York, Ontario, 

 Michigan and Minnesota. May-July. 



