596 CYPERACE^E. (SEDGE FAMILY.) 



cylindrical usually purplish beak, with a whitish hyaline entire orifice, longer than 

 the ovate blunt purplish scale. (C. Halseyana, Dew. Sf Ed. 1. C. striata, Torr. 

 N. Y. FL, not of Michx. ) Varies considerably ; in one form with the fertile 

 spikes filiform, and the flowers alternate and very distant on the rhachis. 

 Upland meadows, Rhode Island and Mass, to Pennsylvania. 

 11. Periqynia moderately inflated, conspicuously many -nerved, smooth or pubescent, 

 with a straight beak terminating in 2 rigid more or less spreading teeth : bracts 

 leaf-like, with very short sheathing bases, equalling or exceeding the culm : 

 staminate spikes 1-5. 



* Perigynia with a short and thick beak, and short teeth. LACtJSTRES. 

 -i- Perigynia hairy, sometimes glabrate, turgid-ovate. 



120. C. Striata, Michx. (not of Ed. 1). Sterile spikes 3, the uppermost 

 slender-stalked; fertile spikes 1 -2, oblong, .erect, remote, sessile or on short 

 stalks (or the lower rarely on a slender stalk) ; perigynia minutely hairy or 

 smoothish, or rarely smooth, rather thin, longer than the blunt or pointed scale, 

 the teeth usually scariously lobed at the base ; leaves and bracts long and nar- 

 row, rather rigid, involute, with slender or setaceous rough extremities. (C. 

 polymorpha, Ed. 1.) Wet places, New Jersey to Virginia, and southward. 



121. C. Hought6nii, Torr. Sterile spikes mostly 2 ; fertile 2 - 3, oblong 

 or cylindraceous, thicker and less distant, olive-colored ; perigynia hairy, thick- 

 walled, longer than the pointed or short-awn-tipped scale ; the teeth at the 

 orifice narrow and entire ; leaves and bracts flat, shorter and broader, and culm 

 lower (9 f - 15') than in the foregoing. Wisconsin (Lake La Biche), Dr. 

 Houghton ; shore of Lake Ontario, Prof. Whitney ; Medford above Bangor, 

 Maine, J. Blake ; and northwestward. 



-- - Perigynia very smooth, very finely many-nerved. 



122 C. riparia, Curtis. Sterile spikes 2 -5, the uppermost stalked; fer- 

 tile spikes 2-3, oblong-cylindrical, erect, remote, nearly sessile, or the lowest 

 on a short stalk, large and thick (2' -3' long, 4" -6" wide), olive-colored; peri- 

 gynia lanceolate-conical, coriaceous, tipped with rather slender short teeth, 

 longer than the lance-ovate awned scale. (C. lacustris, Willd. and former ed.) 

 Borders of streams, ponds, and swamps: common. Very robust, 3 -5 

 high: leaves 3" -5" wide, and sheaths nodose-reticulated. (Eu.) 



123. C. paludosa, Good. More slender, with spikes smaller, leaves nar- 

 rower, perigynia ovate, flattened, and more strongly nerved than the preceding, 

 the orifice merely notched, and hardly exceeding the awned scale. Border of 

 a salt marsh at Dorchester, Mass., W. Boott. (Nat. from Eu. 1) 



* * Perigynia with an elongated tapering beak and with long and setaceous or awn- 

 like spreading or divergent teeth. AniSTAT.ffi. 



*- Staminate spikes 2-5 (rarely with some fertile fiowers) : fertile spikes remote, 

 erect, rather loose, the uppermost almost sessile, without sheaths, the lowest ojlen 

 on an exserted sometimes spreading peduncle : perigynia ascending. 



124. C. aristata, E. Br. Fertile spikes 2 - 4, cylindrical ; perigynia ovate- 

 lanceolate, smooth, tapering into a slender beak tipped with very slender at 

 length diverging awn-like teeth, longer than the ovate-lanceolate awned and 

 above hispid-ciliate scale ; culm smooth ; sheaths and under surface of the leaves 



