CYPEExlCEAE. 59 



culms nearly smooth, densely cespitose, slightly winged: staminate spike con- 

 spicuous, usually stalked: pistillate spikes few, remote, usually 2.5-4.5 cm. 

 long, loosely flowered: scales ovate to obovate, with wide scarious margins, 

 abruptly short-awned: perigynia appressed- ascending, obtusely triangular, 

 narrowly obovoid or ellipsoid, 3.5 mm. long, more or less striate, narrowed at 

 each end, the beak straight or slightly curved. Common, in woods and 

 thickets. Spr. and sum. 



41. C. styloflexa Buckl. Leaf -blades 3-5 mm. wide, shorter than the culm: 

 culms slender, smooth, 38 dm. long, usually loosely cespitose: bracts short: 

 staminate spike usually long-stalked: pistillate spikes 1-4, distant, loosely 5-10- 

 flowered, 10-20 mm. long, the lower drooping on filiform stalks: scales ovate 

 or ovate-lanceolate, acute, cuspidate or short-awned, usually reddish-brown 

 tinged, shorter than the perigynia: perigynia elliptic-fusiform, 3-angled, many- 

 nerved, 4-5 mm. long, 1.5 mm. thick, tapering into the slender beak. Bare, in 

 thickets. Schists. Spr. and sum. 



42. C. granularis Muhl. Culms tufted, slender, smooth or nearly so, 1.5-7 

 dm. long: leaves slightly glaucous; blades 3-9 mm. wide, the basal shorter than 

 the culm: bracts overtopping spikes: staminate spike sessile or short-stalked: 

 pistillate spikes 3-5, erect or slightly spreading, 1-3 cm. long, 5 mm. thick, 

 many-flowered, stalked or the upper sessile: scales ovate, acute or cuspidate: 

 perigynia ovoid or obovoid, strongly many-nerved, 2-3 mm. long, each with 

 a short, bent or nearly straight beak. Common, in moist meadows and 

 woods. Spr. and sum. 



43. C. oligocarpa Schk. Culms slender, roughish, 1.5-5 dm. long: leaf -blades 

 2.5-3.5 mm. wide, soft: sheaths smooth: bracts similar to the leaves: staminate 

 spike long-stalked or nearly sessile: pistillate spikes 2-4, erect or nearly so, 

 distant, loosely 2-8'-flowered, 8-24 mm. long, less than 4 mm. thick, the lower 

 filiform-stalked: scales ovate, cuspidate or short-awned: perigynia obovoid, pale, 

 2.5-4 mm. long, each narrowed into a short entire beak. M. Bare, in woods 

 and thickets. Limestones. Spr. 



44. C. Hitchcockiana Dewey. Culms slender, 3-7 dm. tall: leaf -blades 3-7 

 mm. wide: bracts foliaceous, overtopping the spikes, the sheaths rough pubes- 

 cent: staminate spike commonly solitary, stalked: pistillate spikes 2-4, erect, 

 loosely 1-6-flowered, 1-2.5 mm. long: scales ovate or ovate-lanceolate, longer 

 than the perigynia, rough awned: perigynia obovoid, green, 4.5-5 mm. long, 

 obliquely short-beaked. M. Occasional, in woods and thickets. Limestones. 

 Spr. 



45. C. conoidea Schk. Culms slender, 5-6 dm. tall: leaf -blades 2-4 mm. wide: 

 lower bracts similar to the leaves, their sheaths rough: staminate spike long- 

 stalked: pistillate spikes 1-3, distant, erect, oblong, 1-2.5 cm. long, 5 mm. thick, 

 the lower long-stalked: peduncles very rough: scales broadly ovate, each con- 

 tracted into a rough awn, the lower longer than the perigynia, the upper shorter 

 than or equalling them: perigynia oblong, obtusely 3-angled, acute, beakless, 

 3 mm. long, 1.5 mm. thick, the orifice entire. Bather rare, in swamps and 

 meadows. Sum. 



46. C. grisea Wahl. Culms smooth or nearly so, 3-7.5 dm. long: leaves light 1 

 green, rarely slightly glaucous, 4-7 mm. wide : bracts similar to the leaves, much 

 overtopping the spikes, their sheaths smooth: staminate spike sessile, or nearly 

 so: pistillate spikes 3-5, oblong, 8-25 mm. long, about 4 mm. thick, the lower 

 slender-stalked and distant : scales cuspidate or awned, the lower usually equal- 

 ling perigynia : perigynia 5 mm. long, 2 mm. thick, beakless. Common, in 

 thickets and woods. Sum. 



47. C. glaucodea Tuckerm. Similar to C. grisea., but pale and very glau- 

 cous. Culms 1.5-6 dm. long: leaf -blades 4-10 mm. wide: bracts foliaceous: 

 staminate spike sessile or nearly so : pistillate spikes 3-5, erect, densely flowered, 



