C YPEKA CEA E. 209 



Newf. to the N. W. Terr., R. I., N. J., Ohio and Mont. Also in Europe. July- 

 Sept 



97. Carex viridula Michx. Green Sedge. (I. F. f. 767.) Glabrous, 

 bright green; culms slender, smooth, 1-4 dm. tall, often exceeded by the basal 

 leaves. Leaves 2 mm. wide or less, the similar bracts much overtopping the spike>; 

 staminate spike sessile; pistillate spikes 2-5, oblong, 4-12 mm. long, 4 mm. in di- 

 ameter or less; perigynia ovoid-oblong. 2 mm. long or less, few-nerved, narrowed at 

 the base, tapering into a 2-toothed beak about one-half as long as the body; scales 

 ovate, shorter than the perigynia. In bogs and on wet rocks, Newf. to Hudson Bay 

 and the N. W. Terr., south to Me., Penn., Minn., Utah and Wash. Summer. 



98. Carex pallescens L. Pale Sedge. (I. F. f. 768.) Light green; culms 

 slender, rough above, 1-5 dm. tall. Leaves fiat, 2-3 mm. wide, pubescent at least 

 on the sheaths; lower bract similar; staminate spike stalked; pistillate spikes 2-4, 

 oblong, slender-stalked or the upper one sessile, densely many -flowered, 8-18 mm. 

 long, 4-5 mm. in diameter; perigynia short-oblong, pale, 2 mm. long, obtuse, few- 

 nerved, beakless, the orifice entire; scales ovate, cuspidate or short-awned. In 

 fields and meadows, Newf. to Ont., R. I., Penn., 111. and Wis. Also in Europe. 

 May-July. 



99. Carex abbreviate Prescott. Torrey's Sedge. (I. F. f. 769.) Pale 

 green; culms rather stiff, 2.5-5 dm. tall, finely ciliate-pubescent. Leaves about 

 2 mm. wide, elongated, usually densely pubescent; lower bract spreading or as- 

 cending; staminate spike short-stalked; pistillate spikes 1-3, short-oblong, 6-10 

 mm. long, sessile or the lower one short-stalked, clustered ; perigynia broadly ob- 

 long or obovoid, glabrous, about 2 mm. long, many-nerved, obtuse, abruptly tipped 

 by a short cylindric beak; scales cuspidate, shorter than the perigynia. In dry 

 soil, N. Y. to the N. W. Terr., south in the Rocky Mts. to Colo. June-July. 



Scales of the spike normal, not elongated and leaf-like. Nos. 100-120. 

 Leaves 2-36 mm. wide; bracts leafy, usually large. Nos. 100-119. 

 Periginia green (yellow or purple in no. 116). Nos. 100-117. 

 Perigynia finely many-striate. Oligocarpae. 

 Sheaths glabrous. 



Perigynia narrowed at both ends, beakless. 100. C. conoidea. 

 Perigynia with a short entire beak. 101. C. oligocarpa. 



Sheaths pubescent. 102. C. Hitchcockiana. 



Perigynia with few or many, mostly strong nerves. Laxiflorae. 

 Plants not at all glaucous, or very slightly so. 

 Beak of the peregynium straight, slender. 



Culms slender, spreading; pistillate spikes 2 or 3, stalked, 



spreading. 103. C. altocaulis. 



Culms stout, erect ; pistillate spikes 1 or 2, erect. 



104. C. polymorpha. 

 Beak of the perigynium bent, short or none. 

 Leaves mostly narrow, 2-12 mm. wide. 

 Scales, at least the upper, obtuse. 



Bracts elongated ; spikes loosely flowered ; culms 



slender. 105. C. tetanica. 



Bracts short ; spikes densely flowered ; culms stout, 



106. C. Meadii. 

 Scales acute, cuspidate, acuminate or awned. 



Perigynia obtusely 3-angled. 



Perigynia obovoid, 2.5-3 mm - l° n g- 



107. C. laxifiora. 

 Perigynia oblong, narrow, about 4 mm. long. 



108. C. stylofiexa. 

 Perigynia sharply 3-angled. 



Spikes drooping or spreading; leaves 2-4 mry. 

 wide, or wider in the variety. 



109. C. digitalis. 

 Spikes erect ; leaves 6-12 mm. wide. 



no. C. Carey ana. 

 Leaves broad, 12-36 mm. wide. 



Bracts leafy, the upper usually overtopping the spikes. 



in. C. Albursina. 

 Bracts mostly reduced to purple leafless sheaths. 



112. C. plantaginea s 



