CYPERACE.K. (sEDGP: FAMILY.) 605 



C, GRACfLLiMA X iiBKscKNs, Hailey. Tall and erect; leaves narrower 

 than in the last, usually slightly hairy ; spikes slender, erect or slightly sj)rcad- 

 int^, often staiuinate at top ; perigyniuni exactly intermediate between the two 

 species, ovate, obscurely nerved, sparsely hairy, beaked, about the length 

 of the ovate ciliate rough-awned scale. (C. Sullivantii, /j>oo/r) — Columbus, 

 Ohio (^ullirant); Youkers, N. Y. (JC. C. Howe), Stanton, Del. (Commons). 

 ++ ++ PciKijuium large, prominently injiated. 



56. C. formbsa, Dewey. Slender, erect, 1 - 2^° high ; leaves flat, mostly 

 rather broad, those of the culm very short; spikes .3-5, scattered, oblong or 

 short-cylindrical (1' long or less), compact, all flexuose or drooping; perigyn- 

 ium ovate, ])uncticulate, obscurely nerved, short-beaked with a slightlv notched 

 orifice, all hut the lowest oue or two twice longer than the blunt or cuspidate 

 scale. — Woods aud copses, Vt. to Mich.; local. 



r)7. C. Davisii, Schwein. & Torr. Always taller ; spikes heavier ; peri- 

 gy i.iuni more inflated, strongly nerved aud prominently toothed, no longer or 

 shorter than the conspicuously awned and spreading scale. — Wet meadows, 

 W. Mass. to S. Minu., aud southward; rare east aud northward. 

 * 4. — -*- 6. Grisecv. 



58. C. grisea, Wahl. Stout, 1 - 2° high ; leaves broad (2 - 3") and slightly 

 glaucous ; bracts broad and leaf-like, diverging, very much exceeding the culm ; 

 staminate spike small and {fissile ; pistillate spikes 3-4, short (!' long or less), 

 the highest two usually contiguous to the staminate spike and sessile, the others 

 somewhat remote aud peduncled, all erect, compact ; perigynium oblong, point- 

 less, marked with impressed nerves, turgid and cylindric, all but the low(st 

 longer than the narrow, cuspidate or blunt, nerved scale. — Moist grounds, 

 throughout, except along our northern borders; common. — Var. angusti- 

 f6lia, Boott. Much more slender ; leaves scarcely half so wide, the bracts, 

 especially, much narroAver and shorter and more erect; spikes slender; peri- 

 gynium scarcely inflated, triangular-oblong, bearing a sharp beak-Like point, 

 2-ranked ; scale nerveless, long-awned and spreading. N. J. to S. Ohio, and 

 southward ; common. — Var. o lobosa, Bailey. Low, 3-12' high, often spread- 

 ing; spikes few-flowered, often with but 2 or 3 perigyuia; perigynium short, 

 inflated, very blunt, nearly globose or obovate ; scale short, not proiniueutly 

 cuspidate or the up|)er ones wholly blunt. Mo., Kan., and southward. 



Var. (?) rigida, Bailey. Bigid; leaves rather narrow, long and erect; 

 staminate spike prominently peduncled; pistillate spikes scattered, all more 

 or less stalked, conspicuously 2-ranked ; perigynium triangular-oblong, hard, 

 longer than the ciis])idate ascending scale. — Sellersville, Penn., and Del. 



59. C. glaucod^a, Tuckerm. Lax or somewhat strict (6-18' high), 

 densely glaucous ; leaves flat, variable in width, spikes as in n. 58; perigy- 

 nium firm, not inflated, prominently impressed-ncrved, glaucous, longer than 

 the short-cuspidate or blunt thin and ajipressed scale. (C. flaccosperma, la«t 

 ed.) — Meadows and swamps, Mass. to S. 111., and southward; local. 



* 5. Spirostachv^:. — ■<- 1. (hanidares. 



60. C. granul^ris, Muhl. Erect or spreading, 8'- 2° high, somewhat 

 glaucous; leaves flat, various; bracts broad aud long, much exceeding the 

 culm ; spikes 3 -4, scattered, all but tlie upper jjedunclcd, erect or tmc^udina. 



