200 FLORA. 



47. Carex Parryana Dewey. Parry's Sedge. (I. F. f. 717.) Glabrous, 

 Culms very slender, smooth, stiff, 2-5 dm. tall, leafless above. Leaves about 2 mm. 

 wide, much shorter than the culm, their margins somewhat involute; spikes 1-4, 

 dense, erei t. linear-cylindric, 1-2.5 dm. long, 3 mm. in diameter, the upper 

 sessile, staminate below or throughout, the lower stalked and subtended by an 

 almost filiform bract; perigynia plano-convex, obovate, pale, less than 2 mm. long, 

 minutely papillose, faintly few-nerved, minutely beaked, the orifice entire; scales 

 ovate, acute or mucronulate, dark brown with lighter margins, alxmt as long as 

 the perigynia. Hudson Bay to N. W. Terr., south in the Rocky Mts. to Colo. 

 Summer. 



48. Carex Buxbaumii Wahl. Brown Sedge. (I. F. f. 718.) Glabrous; culms 

 slender, stiff, sharp-angled, rough above, 3-9 dm. tall. Leaves rough, erect, 2-4 

 mm. wide; spikes 2-4, oblong or cylindric, erect, all sessile and close together, or 

 the lowest sometimes distant and short-stalked, 8-37 mm. long, about 8 mm. in 

 diameter, the terminal one staminate at the base or rarely throughout; perigynia 

 elliptic or obovate, flat, ascending, 2 mm. long, light green, faintly few-nerved. 

 beakless, the apex minutely 2-toothed; scales ovate, awn-tipped, black or dark 

 brown with a green midvein, loneer than the perigynia. In bogs, Newf. to Alaska, 

 Ga., Ky., Utah and Cal. Also in Europe. {C.fusca Bailey, not All.) 



49. Carex stricta Lam. Tussock Sedge. (I. F. f. 719.) Glabrous, rather 

 dark green; culms slender, stiff", usually in dense clumps, sharply 3 -angled, rough 

 above, 0.3-1.1 m. tall. Leaves rarely overtopping the culm, very rough margined, 

 2-4 mm. wide, their sheaths becoming fibrillose ; lower bract similar ; staminate 

 spikes solitary or sometimes 2, stalked ; pistillate spikes 2-5, linear-cylindric, 

 often staminate at the top, densely flowered, or loose at the base, 2-5 cm. long, 

 about 4 mm. thick, sessile or the lower stalked ; perigynia ovate-elliptic, acute, 

 faintly few-nerved, 2 mm. long or less, minutely beaked, the orifice entire or nearly 

 so ; scales brown-purple with green margins and midvein, oblong or lanceolate, 

 appressed; stigmas 2. In swamps, Newf. to Ont., Neb., Ga. and Tex. Hybridizes 

 with C. fill for mis. July-Sept. 



Carex stricta angustita (Boott) Bailey. Pistillate spikes longer, 5-10 cm. long, erect; 

 scales lanceolate, acute, often longer than the perigynia. Range apparently nearly that 

 of the type. 



Carex stricta xerocilrpa (S. H. Wright, Britton). Pistillate spikes almost filiform, 

 about 2 mm. in diameter, erect. N. Y. to 111. 



50. Carex Haydeni Dewey. Hayden's Sedge. (I. F. f. 720.) Glabrous, 

 similar to C. stricla but smaller; culm slender, seldom over 0.5 m. high. Leaves 

 2-3 mm. wide, their sheaths slightly fibrillose or not at all; lower bract foliaceous, 

 about equalling the culm; pistillate spikes 1-3 cm. long, about 4 mm. in diameter, 

 erect or somewhat spreading, sessile or nearly so ; perigynia orbicular, obtuse, 

 about I mm. broad, faintly 2-4-nerved, minutely beaked, the orifice entire; scales 

 lanceolate, purplish, spreading, very acute, about twice as long as the perigynia ; 

 stigmas 2. Swamps, N. B. to R. I., Iowa and Neb. 



51. Carex Nebraskensis Dewey. Nebraska Sedge. (I. F. f. 721.) 

 Glabrous; culms stout, sharp-angled, 0.3-0.6 m. tall. Leaves pale green, 3-5 mm. 

 wide, rough-margined, their sheaths more or less nodulose; lower bract sometimes 

 equalling the culm, the upper much shorter and narrower; staminate spikes com- 

 monly 2, stalked; pistillate spikes 2-4. dense, oblong-cylindric, erect, 2-3 cm. long, 

 about 6 mm. in diameter, sessile or the lower short-stalked; perigynia elliptic or 

 ol»vate, prominently several-ribbed, short-beaked, the beak 2-toothed ; scales 

 ovate or lanceolate, acute or mucronate, brown with a green midvein or green all 

 over, the upper shorter than the perigynia; stigmas 2. Neb. to Ore. and N. Mex. 

 May-Aug. 



52. Carex aquatilis Wahl. Water Sedge. (I. F. f. 722.) Glabrous, 

 glaucous, pair green; culms sharp-angled above, smooth or nearly so, 0.5-I.I m. 

 tall. Leaves elongated, 4-7 mm. wide, their sheaths nodulose; bracts similar, the 

 lower much overtopping the culm; staminate spikes 1-3. stalked; pistillate spikes 

 linear-cylindric, often staminate at the summit, 2-6 cm. long, 4-6 mm. in diameter, 

 sessile and dense, or the lower loosely flowered at the base and short-stalked; peri- 

 gynia elliptic, green, nerveless, minut< L 1 eaked, the orifice entire; scales oblong, 



