SEDGE FAMILY 137 



4.5 mm. wide; pistillate spikes 3-6, oblong-cylindric, 1-3 cm. long, 4-6 mm. wide, 

 somewhat attenuate at the base, closely many-flowered; perigj^nia flat, 3 mm. 

 long; achene short-stipitate. IVIomi tains: Alta. — -Wyo. — Ida. — Wash. Mont. 

 — Subalp. Jl-Au. 



119. C. Raynoldsii Dewey. Culms 2-4 dm. high, stout; rootstocks stout, 

 stolon if erous; leaf-blades 3-8 mm. wide; pistillate spikes 2 or 3, approximate or 

 the lowest separate, jieduncled, erect, oblong, 1-2 cm. long, 7-8 mm. wide, closely 

 15-40-flowered; scales blackish, with light midvein, exceeded by the perig>^nia; 

 perigynia oblong-oval, round in cross-section, 4.5 mm. long, 2 mm. wide, the 

 short beak bidentate. C. ahoriginum M. E. Jones. Mountain meadows and 

 bogs: Alta. — -Colo. — Calif. — Wash. Mont. — Subalp. Je-Au. 



120. C. Halleri Gunn. Culms 1.5-6 dm. high, slender; leaf-blades 1-3 mm. 

 wide; spikes 2-4, clustered, erect, sessile or short-peduncled, 4-10 mm. long, 

 closely 8-25-flowere9 ; scales black, shorter than the perigynia; perig\'nia minutely 

 bidentate. C.alpinaSw. Rocky places: Greenl. — -Ont. — -N.M. — -Alaska ; Eurasia. 

 Alp.— Mont. Jl-Au. 



121. C. Nelsonii Mackenzie. Culms 2-4 dm. high, stiff, smooth, erect, 

 fibrillose at base; leaf -blades 3-4 mm. wide; spikes 2 or 3, oblong or obovoid, 

 10-12 mm. long, 5-8 mm. wide, the lateral densely 15-35-flowered; scales black, 

 the midvein obsolete; perigynia 4 mm. long, 1.5 mm. wide, roughened on edges 

 above, the conspicuous black beak sharply bidentate. Mountain meadows: 

 Wyo. — -Colo. Subalp. — Alp. Jl-Au. 



122. C. albo-nigra Mackenzie. Culms 1.5-3 dm. high, stiff, roughened 

 above, slightly fibrillose at the base; leaf-blades 3 mm. wide; spikes usually 3, 

 the lateral narrowly oblong, 8-10 mm. long, 4 mm. wide, closely 8-15-flowered, 

 the terminal spike larger; scales with nearly obsolete midvein; perigynia black- 

 ish, 3 mm. long, 2 mm. wide, minutely roughened on margins. Mountain mead- 

 ows: Mont. — -Colo. — -Ariz. — -Utah. Subalp. — Alp. Jl-Au. 



123. C. nova Bailey. Culms 1.5-6 dm. high, stiff, little roughened, fibrillose 

 at the base; leaf-blades 2.5-5 mm. wide; spikes 2-4, broadly ovoid, 7-12 mm. 

 long, 6-10 mm. wide, closely flowered; scales with inconspicuous midvein; peri- 

 gynia blackish, 3-4 mm. long, 2-3.5 mm. wide, minutely roughened on the mar- 

 gins. Mountain meadows: Mont. — N.M. — -Utah — Ida. Mont. — Alp. Je-Au. 



124. C. atrosquama Mackenzie. Culms 3-4.5 dm. high, slender, often 

 nodding, little roughened, slightly fibrillose at the base; leaf-blades 2.5-3.5 mm. 

 wide; spikes 3-4, approximate, the lower 1-2 slender-peduncled, oblong, 6-12 

 mm. long, 5 mm. wide densely 15-30-flowered; scales black with obsolete mid- 

 vein; perigynia olive-green, 3.25 mm. long, 1.75 mm. wide, round-tapering at the 

 base, abruptly minutely beaked. Mountain meadows: Alta. — -Mont. — Ida. — • 

 B.C. Mont. Jl-S. 



125. C. bella Bailey. Culms 5-9 dm. high, slender, nodding, roughened 

 above; leaf -blades 3-6 mm. wide; spikes 3-4, gynaecandrous, 1-3 cm. long, 4-6 

 mm. wide, 15-30-flowered; scales brownish black, mostly shorter than the perigj'nia; 

 perigynia green or olive-green, 4 mm. long, 2 mm. wide, rounded at the ends. 

 Mountain meadows: Colo. — N.M.— Ariz. — Utah. Mont. — Alp. Jl-Au. 



126. C. atratiformis Britton. Culms 3-9 dm. high, slender, often nodding, 

 roughened above, slightly fibrillose at the base; leaf-blades 3 mm. wide; spikes 

 3-4, oblong, 1-2.5 cm. long, 4-6 mm. wide, closely 10-30-flowered; scales dark 

 reddish brown; perigynia 2.5-3 mm. long, 1.5 mm. wide, rounded at the base, 

 round-tapering at the apex. Along streams: Lab. — Me. — Alta. — Yukon. 

 Mont. — Boreal. Je-Au. 



127. C. chalciolepis Holm. Culms 2-7 dm. high, slender, smooth, or nearly 

 so; leaf-blades 3-6 mm. wide, the uppermost bract-like, 2-6 cm. below inflores- 

 cence; spikes 2-4, contiguous, oblong to broadly ovoid, 1-2 cm. long, 5-10 mm. 

 wide, closely flowered in many rows; scales very thin, coppei'-colored, much 

 narrower but longer than the perigynia, the midvein indistinct; perigj-nia 3-4 

 mm. long, 2.5-3 mm. wide, with broadly oval or obovate body, rounded at ends; 



