CYPERACE^. ^SEBGE FAMILY.) 603 



S.MfTHii, Porter. Tall, sleuder, olive-greeu, the leaves very loug, very nearly 

 smooth ; spikes small, globular or short-cyliudrical (^' long or less), the lowest 

 often somewliat remote, all more inclined to be peduncled; perigyuium globu- 

 lar and turgid, brown, squarrose, giving the spike a characteristic plump ap- 

 pefirauce. — Fields and woodlands, southern N. J., E. I'euu., and southwaul; 

 also in Ark. ; frequent. 



* 4. — -t- 2. Sylvdticce. 



48. C. longirostris, Torr. Very slender but erect, 1|- 3° hi oh, growing 

 in stools; leaves narrow, flat, loose ; spikes 3-5, 1-2' long, loosely flowered, 

 drooping ; perigynium thin, slightly inflated, green, nearly nerveless, spread- 

 ing, the beak longer than the body, about the length of the awned scale. — 

 Shady banks from N, Eng. to Neb., and northward; frequent. — Var. minor, 

 Boott. Smaller and slenderer ; spikes 9" long or less, very narrow and very 

 loosely or even alternately few-flowered; perigynium smaller. Neb. and 

 westward. 



* 4. — t- 3. Fle'xiles. 



49. C. castanea, Wahl. Slender but erect, \-2^° high; leaves broad 

 and flat, hairy, much shorter than the rough culm ; spikes 2-4, approximate, 

 widely spreading or drooping on filiform stalks, 1' long or less, rather dense, 

 I'awny ; perigynium l)road-lanceolate, gradually narrowed into a beak ^ as long 

 as the body, thin, wdth a nerve on each side, longer than the light brown or 

 whitish acute thin scale. (C. flexilis, Budge.) — Banks, Conn, to Minn. ; local. 



C. arctAta X castAxea, Bailey. Leaves mostly narrower, less hairy or 

 smooth ; spikes very slender and loosely flowered (scarcely over T' wide), erect 

 or drooping, chestnut color; perigynium thin, long-ovate, shorter-l)eaked, 

 lightly nerved, mostly surpassing the pointed whitish scale. (C. Knieskeruii, 

 Deweij.) — Oneida Co., N. Y. ; Keweenaw Co., Mich. (Far well) ; N. Minn. 



50. C. caplllaris, L. Very slender but erect, 2-12' high ; culm smooth, 

 longer than the narrow flat or at, length involute leaves; spikes 2-4, either 

 scattered or approximate, all more or less long-peduncled and drooping, borne 

 in the axils of conspicuous sheathing bracts, very small (3 - 12-flowered) ; peri- 

 gynium thin, very small, oblong-ovoid, the beak hyaline-lipped, longer tliau 

 the very obtuse white scale. — Alpine summits of the White Mts. ; Cortland, 

 N. y., Alcona Co., Mich., and Point de Tour, L. Huron. (Eu.) 



* 4. — -t- 4. De'hiles. 



■^Peririynium thin, rarehj icith more than two prominent nerves. 



51. C. arctata, Boott. Slender, erect, l - 2° high ; radical leaves rr^jch 

 shorter tlian the culm and very broad (2^-5"), flat; bracts l)r()ad and sliort, 

 long-sheathing ; spikes 3 - 5, all widely spreading or drooping on filiform stalks, 

 1-3' long and exceedingly slender; perigynium short (2" long or less), ab- 

 ruptly and conspicuously stipitate and abruptly contracted into a beak, 3-cor- 

 nered, prominently nerved, green, mostly spreading, scarcely longer than the 

 very sliarp or cuspidate scale. — Woods and copses, N. Eng. to I'enn. and Minn. ; 

 common. 



Var. Faxoni, Bailey. Spikes shorter and usually short-peduncled, erect 

 or nearly so, niucli more densely flowered, part of them commonly contiguous 

 at tlie top of the culm, rendering the shorter stamiuate spike inconspicuous • 



