514 cvrKRACE^:. (SEDGE FAMILT.) 



pressed leaves ; spikes aggregated into an ovoid head ; perigynia ovate, a little 

 longer than the seale. Cold peat-hogs, New York to Wisconsin, and north- 

 ward. (En.) 



28. C. tcnt'lla, Schk. Spikes 2-4, wry small, remote, with commonbj 2 

 frtil' Jloirers ; perigynia ovate, twice as long as the scale. (C. loliacea, Schk* 

 supp., not of L. C. disperma, Dew. C. graeilis, ed. 1, not of Ehrh.) Cold 

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

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



3. Spikes pistillate above, staittinaft; at t/te 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 silver//: scales white and membranaceous ; the bracts resembling 

 them, or prolonged and bristle-shaped. CANESCEXTES. 



*- Periyynia somewhat thickened and leathery, distinct.li/ nerved, with a smooth or mi- 

 nutely serrulate short point, entire or slightly notched 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. Re- 

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

 l-2 long. 



30. C. tClllliflora, 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. caiicscens, 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. Richardi, Michx.) Marshes and wet meadows ; common, especially 

 northward. (Eu.) 



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

 and roundish G- 15-flowered spikes, the more pointed perigynia spreading (and 

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

 sphaerostachya, ed. I. C. tcnella, Ehrh. C. Persoonii, Sieber. C. vitilis, Fries. 

 C. Gebhardi, Jfoppe. C. sphaerostachya 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 ^-toothed beak. 



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

 mate, the others listinet, the lowest long-bracted ; perigynia oblong-lanceolate, 

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

 to Wisconsin, and northward. 



w * Spikes ijfitid Hi- o j ovoid, more or less clush red ; per'njynia concave-convex, com- 

 pressed, mnr<jtn<d or winged, nerved, with a rough 2-toothed beak, often tawny 

 tit matiiritv : scales lawny or white, awnless : bracts bristle-shaped, usually 

 *a]lint, r before the maturitv of the spikes (in No. 34 persistent, very long and 

 leaf like.) 



