126 CYPERACEAE 



nerved, tapering into a beak half the length of the body. Open places: Newf. 

 -Conn. Mich. Ida. B.C. Boreal. Je-S. 



43. C. scoparia Schkuhr. Culms 2-8 dm. high, rough beneath the head; 

 leaf-blades 1.5-3 mm. wide; spikes 3-10, 6-16 mm. long, 4-6 mm. wide, aggre- 

 gate or scattered, clearly defined; scales ovate, acute, brownish tinged; peri- 

 gynia erect-ascending, brownish, usually 5.5-6.5 mm. (occasionally 4-5.5 mm.) 

 long, 1.2-1.9 mm. wide, nerved, tapering into a beak half the length of the body. 

 Moist soil: Newf. Fla. Colo. 'B.C. Plain Submont. My-Au. 



44. C. Bebbii Olney. Culms 2-8 dm. high, rough beneath the head; leaf- 

 blades 2-4.5 mm. wide; spikes 5-10, 4-9 mm. long, 3-6 mm. wide; scales ovate, 

 acute, brownish; perigynia ascending, narrowly ovate, 3-4 mm. long, 1.5-2 mm. 

 wide, rounded at base, obscurely nerved, tapering into a beak half the length of 

 the body. Low ground: Newf. N.J. Mont. B.C. Plain- Submont. Je- 

 Au. 



45. C. tenera Dewey. Culms 3-7 dm. high, slender, rough beneath head; 

 spikes 3-8, 4-5 mm. thick; scales acutish, hyaline with green midvein, light 

 brownish tinged; perigynia ascending or spreading, ovate, thick, 3-4 mm. long, 

 1.5-2.5 mm. wide, rounded at base, nerved, tapering into a beak half the length 

 of the body. C. stramineaAm. auth., in part. Woodlands: N.B. Mass. Ky. 

 Ark. -Mont. -Canadian Rockies. Apparently rare in our range. Mont. 

 Boreal. Je-Au. 



46. C. tincta Fernald. Culms 6-10 dm. high, rough beneath head; spikes 

 4-12, 6-9 mm. long, 5-8 mm. thick; scales ovate, acutish, reddish brownish with 

 light midvein; perigynia 10-30, appressed, ovate, thick, 3.75-4.5 mm. long, 

 1.5-2 mm. wide, rounded at base, nerved, tapering into a beak less than half 

 the length of the body. Woodlands: Que. Me. -N.Y. 'Mich. Alta. Boreal 

 Plain. My-Jl. 



47. C. brevior (Dewey) Mackenzie. Culms 3-12 dm. high, rough beneath 

 head; leaf-blades 2-4 mm. wide; spikes 3-10, oblong to globose, 4-9 mm. wide, 

 7-15 mm. long, aggregate or separate; scales acute; perigynia ovate to orbicular, 

 thick, 4-5.5 mm. long, 2.5-3.5 mm. wide, spreading or ascending, faintly nerved 

 on inner face, the beak about one-third the length of the body. C. festucacea 

 authors, in part. Dry soil: N.B. Fla. Tex. N.M. 'B.C. Plain Submont. 

 Ap-Au. 



48. C. Egglestonii Mackenzie. Culms 4-9 dm. high, roughened beneath 

 head; leaf -blades 2.5 mm. wide; spikes 3-6, closely aggregate, broadly ovoid, 

 10-14 mm. long, 6-10 mm. wide; scales ovate, acute, hyaline-margined; perigynia 

 numerous, appressed-ascending, ovate, olive-green or brownish in age, 6-7 mm. 

 long, 3 mm. wide, thin, obscurely nerved on inner face, strongly winged, rounded 

 at the base, the beak one-third the length of the body. "Carex straminiformis 

 Bailey" auth., in part. Dry soil: Wyo. Colo. Utah. Mont. Subalp. Jl- 

 Au. 



49. C. phaeocephala Piper. Culms 1-3 dm. high, rough beneath head; 

 leaves bunched at the base, the blades more or less involute, 1.5-2 mm. wide; 

 spikes 2-5 (rarely 7), aggregate, 6-12 mm. long, 5-8 mm. wide; scales strongly 

 hyaline-margined, acute; perigynia ascending, oblong-ovate, 1.8 mm. wide, 

 round-tapering at the base, obscurely nerved on inner face, contracted into a 

 beak about 1 mm. long. "C. Preslii Steud." Bailey. "C. petasata Dewey" 

 Holm. C. leporina v. arnericana Olney. Mountain summits: Alta. Colo. 

 Calif. B.C. AlpMont. Jl-S. 



50. C. xerantica Bailey. Culms 3-6 dm. high, nearly smooth; leaf -blades 

 2-3 mm. wide; spikes 3-6, approximate but distinct, ellipsoid, 8-14 mm. long, 

 5 mm. wide; scales silvery-hyaline, darker tinged; perigynia 4-5.5 mm. long, 

 2-2.5 mm. wide, nearly nerveless on inner face, round-tapering at the base, 

 tapering into a beak one-third the length of the body. Prairies and plains: Man. 



Sask. Colo. Kans. Plains. Jl. 



51. C. praticola Rydb. Culms slender, 2.5-6 dm. high, roughened beneath 

 the head; leaf-blades 1-2 mm. wide; spikes 2-6, elliptic, 6-16 mm. long, 5 mm. 

 wide; scales somewhat brownish-tinged, shining; perigynia appressed, ovate- 



