578 CTnciiACE^. (sedge family.) 



30. C. tenuifibra, AVahl. Spikes 3, few-Jfoirered, closely approximated ; 

 pfrifji/niu orate-ohluny, al)Out the length of tlie hroadly ovate scale. — Cold 

 swamps, N. New Eiiylaiul to Wisconsin, and northward. (Eu.) 



31. C. candscens, L. (in part). Tale or f/hucous ; sjiitcs 5-7 (almtt 

 \2-'20Ji(ju:eie(I}, (he iiji/m- (ip/iroxiiiuiled, the rest distinct, the lowermost remote; 

 p<ri(/i/iiia orate, equalling- tlie pointed scale. (C. curta, Good. C. Kichardi, 

 Mahx.) — Marshes and wet meadows, common, especially northward. (Ku.) 



Var. vitilis is a more slender and weak form, not glaucous, with smaller 

 and roundish 6- l.'i-flowered spikes, the more pointed perigynia spreading (and 

 often tawny) at maturity: perhaps a good species. (Var. alpi'cola and var. 

 sphairostachya, AW. 1. C. tenella, .EA/7i. C. Tersoonii, 5/e6er. C. vitilis, /'nes. 

 C. Gebhardi, Hoppe. C. sphterostachya and C. Buckleyi, Dew.) — On moun- 

 tains, and high northward. (Eu.) 



32. C. Norv^gica, Schk. Pale; stem 1° or less high, angled; spikes 

 2-5, rather approximate, oblong, short-bracted, with a lew staniinate (lowers 

 below the numerous fertile ones, or the terminal one all staniinate; perigynia 

 oval or oblong, lenticular, many-nerved, with a short entire beak, equalling the 

 obtuse scale. — Salt marsh. Wells, Maine, Rec. J. Biake. (Eu.) 



t- t- Peiirpjiiia tliin, .tponf/i/tliickencd at the base, scarceli/ nerved, 2-toothed. 



33. C. Dewey^na, Schw. Spikes about 4; the 2 uppermost approximate, 

 the others distinct, the lowest long-bracted ; perigynia oblong-lanceolate, taper- 

 ing into a rough serrate-margined beak, rather longer than the sharply pointed 

 or awncd scale. — Copses, New England and New York to AVisconsin, and 

 northward. 



* * S}iikes ovoid or ohovoid, more or less clustered ; periffynia concave-conver, com- 

 pressed, man/iiied or iviiiged, nerved, with a rough 2-toothcd beak, often 

 tawny at maturity : scales tawn}- or white, awnless : bracts bristlc-shapcd, 

 usually falling before the maturity of the spikes. 

 ■*- Spikes small: perigynia usually (but not always) becoming spongy-thickened at the 

 base, the margins rigid. — STELLUL.\T.aE. 

 ++ Spikes completely or incompletely dicccious. 



34. C exllis, Dew. Spike commonly solitary and cylindrical, dioecious or 

 androgynous (staniinate) and contracted below, often with 1-6 small atlditional 

 fertile spikes contiguous to the terminal larger one ; perigynia orate.-lanceolate, 

 plano-convex, with a few fine nerves only on the convex side, spreading, turning 

 brownish., longer than ovate acute or obtuse scale; leaves involute-filiform. — 

 Swamps, E. New England to New Jersey, near the coast: also borders of 

 mountain likes, Es.scx County, New York. 



35. C. St6rilis, Wilkl. 6';)//.vs 4-6, all staminate and rarely all pistillate 

 on some plants, many androgynous, especially the lower spikes, all oblong or the 

 fertile roundish ; perigynia ovale from a broad somewhat heart-shaptd sharply mar- 

 gined base, flat, diverging or the lower recurved, very acutely 2-toothed at the 

 apex, about equalling the acute or pointed scale; leaves narrow^, involute, pale. 

 (C. stellulata, var. sterilis, of former ed.) — Swamps and wet meadows: com- 

 mon, especially northward. 



