t>14 CYl'EUACEJE. ^SEDGE FAMILY.) 



pressed leaves; .</>//.-/. aggrrgafi-d into an oroid head; perigynia ovate, a little 

 longer tlum tlie scale. Cold pent-bogs, New York to Wisconsin, and north- 

 ward. (Eu.) 



28. C. tont'Ila, Selik. Spikes 2-4, very small, remote, with commonly 2 

 fert He flowers ; pcrigynia ovate, twice as long as the scale. (C. loliacea, Sc/i/c. 

 8ii/>]>., not of L. C. clisperma, Dew. C. graeilis, ed. 1, not of Ehrh.) Cold 

 swamps, New England to Pcnn., Wisconsin, and northward. A slender spe- 

 cies, 6' -12' high, with long grassy leaves, growing in tufts. (Eu.) 



3. Spikes pistillate above, st a minute at the base. 



* Spikes roundish-ovoid, rather small, more or less distant on the zigzag axis (closely 

 aggregated in No. 30) : perigynia plano-convex, smooth, pale green, becoming 

 whitish or silvery : scales white and membranaceous ; the bracts resembling 

 them, or prolonged and bristle-shaped. CANESCENTES. 



i- Perigynia somewhat thickened and leathery, distinctly nerwd, irilh a smooth or mi- 

 nutely serrulate short point, entire or slightly note/ted at the apex. 



29. C. trispcrma, Dew. Spikes 2-3, very small, with about 3 fertile 

 flowers, remote, the lowest with a long bract ; perigynia oblong, with numerous 

 slender nerves, longer than the scale. Cold swamps and woods, especially on 

 mountains, New England to Pennsylvania, Michigan, and northward. lle- 

 sembling the last, but with larger spikes and fruit, and weak spreading culms, 

 l-2long. 



30. C. tenilifldra, Wahl. Spikes 3, few-flowered, closely approximated; 

 perigynia ovate-oblong, about the length of the broadly ovate scale. Cold swamps, 

 N. New England to Wisconsin, and northward. (Eu.) 



31. C. cancsceilS, L. (in part). Pale or glaucous; spikes 5-7 (about 

 12 - 20-Jlowered) , the 2-3 upper approximated, the rest all distinct and the lower- 

 most remote; perigynia ovate, about the length of the pointed scale. (C. curta, 

 Good. C. Ilichardi, AficJuc.) Marshes and wet meadows ; common, especially 

 northward. (Eu.) 



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

 and roundish 6 - 1 5-flowercd spikes, the more pointed perigynia spreading (and 

 often tawny) at maturity : perhaps a good species. (Var. alpicola and var. 

 sphaerostachya, ed. 1. C. tenella, Ehrh. C. Persoonii, Sieber. C. vitilis, Fries. 

 C. Gebhardi, Iloppe. C. sphasrostachya and C. Buckleyi, Dew.) On moun- 

 tains, and high northward. (Eu.) 



- - Perigynia thickened only at the base, obscurely nerved on the outer side, tapering 

 into a rough 2-toothed beak. 



32. C. Deweyaiia, Schw. Spikes about 4 ; the 2 uppermost approxi- 

 mate, the others listinct, the lowest long-bractcd ; perigynia oblong-lan&olute, 

 rather longer than the sharply pointed or awned scale. Copses, New England 

 to Wisconsin, and northward. See Addend. 



* * Spikes ovoid or obovoid. more or less clustered; perigynia concave-convex, com- 

 pressed, man/intd or tcin;/<d, nerved, with a rough 2-toothcd beak, often tawny 

 at maturity : scales tawny or white, awnless : bracts bristle-shaped, usually 

 falling before the maturity of the spikes (in No. 34 persistent, very long and 

 leaf-like.) 



