220 FLORA. 



hard, shining, the body slightly more than I mm. long, truncate or rounded at the 

 head, short-stalked, tapering into a flat conic beak about its own length; scales thin, 

 ovate, brownish, acute or short-awncd, about equalling the perigynia. In swamps 

 and wet meadows, N. S. to Hudson Bay, Br. Col., R. L, Penn. and Neb. Also in 

 Europe. May- July. 



Carex teretiiiscula prairea (Dewey) Britton. Cluster of spikes compound, branched, 

 the top commonly nodding. Ont. to Br. Col., Mass., Tenn., Ky., Iowa and Ore. 



158. Carex alopecoidea Tuckerm. Foxtail Sedge. (I. F. f. 828.) Light 

 green; culms soft, sharply 3-angled, 5-9 dm. long, rough ish above. Leaves flat, 

 3-6 mm. wide; bracts almost filiform, commonly short; spikes several or numerous, 

 in a cluster 2-5 cm. long; perigynia ovate or ovate-lanceolate, short-stipitate, 3- 

 4 mm. long, pale brown, the tapering rough 2 -toothed beak nearly as long as the 

 body ; scales ovate or oval, light brown, cuspidate or short-awned, about as long 

 as the perigynia. In meadows, Vt. to N. Y., Penn., Mich, and Manitoba. 



Carex alopecoidea sparsispicata Dewey. Spikes distinctly separated. S. E. Mich. 



159. Carex gravida Bailey. Heavy Sedge. (I. F. f. 829.) Light green; 

 culms 4-9 dm. tall, 3-angled, rough above. Leaves flat, 3-6 mm. wide ; bracts 

 usually very short ; spikes several, in a dense heavy head 2-3.5 cm « l° n g> pale, 

 subglobose ; perigynia flat, broadly ovate or suborbicular, 3-4 mm. long, rounded 

 at the base, narrowed into a 2-toothed beak about one-third as long as the body, 

 several-nerved on the outer face or nerveless ; scales, acute, cuspidate or short- 

 awned, about as long as the perigynia. 111. to S. Dak., Neb. and Ind. Terr. 

 May-July. 



160. Carex vulpinoidea Michx. Fox Sedge. (I. F. f. 830.) Culms stiff, 

 3-angled, rough above, 3-9 dm. tall. Leaves 2-5 mm. wide, often exceeding the 

 culm ; bracts bristle-like; spikes ovoid-oblong, 4-8 mm. long, very numerous in a 

 cluster 3-13 cm. long ; perigynia ovate, less than 2 mm. long, greenish brown, 

 flat, several-nerved on the outer face, nerveless or 1-3-nerved on the inner, tipped 

 with a lanceolate 2-toothed beak about half as long as the body ; scales lanceolate, 

 acuminate or awned, about as long as the perigynia, but narrower. In swamps 

 and wet meadows, N. B. to Manitoba, Fla., La., Neb. and Tex. June-Aug. 



161. Carex xanthocarpa Bicknell. Yellow-fruited Sedge. (I. F. f. 831.) 

 Culms rather stout, rough above, 0.3-1.4 m. tall, much longer than the leaves. 

 Leaves 3-6 mm. wide ; head usually dense; spikes numerous, ovoid, short ; bracts 

 mostly short and inconspicuous ; perigynia bright yellow, plano-convex, ovate- 

 elliptic, about 3 mm. long, with a narrowed or cuneate base, and a short minutely 

 2-toothed beak, nerveless, or obscurely few-nerved on the outer face ; scales acumi- 

 nate, short-awned. In fields, Mass. to N. Y. and Iowa. June-Aug. 



Carex xanthocarpa annectens Bicknell. Lower and slender ; leaves 2-4 mm. wide ; 

 head not over 3.5 cm. long ; bracts usually numerous and longer than the globose spikes; 

 perigynia ovate or suborbicular. Abundant in the vicinity of N. Y. 



162. Carex setacea Dewey. Bristly-spiked Sedge. (I. F. f. 832.) 

 Culms 0.4-1.2 m. tall, rough above. Leaves 3-6 dm. long, 2-6 mm. wide, shorter 

 than the culm; head narrowly oblong, 3-6 cm. long; bracts bristle-like; spikes 

 ovoid or ovoid-oblong, 5-8 mm. long, usually close together; perigynia lanceolate 

 or ovate-lanceolate, tapering from a more or less truncate base to a narrow rough 

 2-toothed beak, few-nerved, 2.5-3 mm. long. N. Y. and Mass. June-Aug. 



163. Carex Sartwellii Dewey. Sartwell's Sedge. (I. F. f. 833.) Culms 

 stiff, rough above, 3-angled, 3-9 dm. tall. Leaves 2-4 mm. wide; bracts se- 

 taceous, usually small; spikes ovoid or oblong, 4-8 mm. long, usually densely aggre- 

 gated in a narrow cluster; perigynia lanceolate, about 2 "mm. long, strongly 

 several-nerved on both faces, tapering into a short 2-toothed beak; scales ovate, 

 pale brown, about equalling the perigynia. In swamps, Ont. to Br. Col., N. Y., 

 111., Mich.. Ark. and Utah. May-July. 



Perigynia ellipsoid, nearly terete; spikes 1-5-flowered, widely separated, or the uppei 

 close together. 164. C. Unella. 



Perigynia lanceolate, ovate or roundish, compressed or plano-convex; spikes several- 

 many-flowered. 



