Family CYPERACEA 33 
Beak of perigynium short, about half as long as the body. 
Seales equal to or longer than the perigynia. 
Scales brown, with scarious margins. 41. C. sartwellii. 
Scales green or only tinged with brown. 
Perigynium wing-margined. 44, C. muhlenbergii. 
Perigynium not wing-margined. 39. C. gravida. 
Scales about half as long as perigynia. 
Leaves 1-3 mm. wide. 42. C. rosea. 
Leaves 4-9 mm. wide; perigynium wing-margined to 
the base; spikes notin heads. 43. C. sphagnoides. 
Perigynia about 2 mm. long or less. 
Leaves less than 2 mm. wide. 
Beak of perigynium shorter than the body. 
37. C. marcida. 
Beak of perigynium as long as the body. 
38. C. teretiuscula. 
Leaves 2-5 mm. wide. 40. C. vulpinoides. 
Staminate flowers below the pistillate, sometimes mixed with 
them in C. siccata. 
Perigynia lanceolate, wing-margined. 
Spikes oblong or oval. 
Spikes blunt, greenish brown. 46. C. tribuloides. 
Spikes pointed, bright brown. 47. C. scoparia. 
Spikes subglobose. 48. C. cristatella. 
Perigynia ovate or orbicular, its body as wide as long. 
Beak as long as body of perigynium. 49. C. straminea. 
Beak not over half as long as body. 
Heads brownish, achene sessile. 50. C. festucacea 
Heads silvery, green or yellowish, achene stalked. 
51. C. bicknellii. 
1. Carex lupulina Muhl. 
In swampy places, mostly in the eastern part of the state. Calla- 
way; Fremont; Grand Island. 
2. Carex lurida Wahl. 
In marshy places in the eastern part of the state. 
3. Carex hystricina Muhl. 
Common throughout the state in marshy places. Aten; Broken Bow; 
- Central City; Crawford; Ft. Robinson; Halsey; St. Paul; Valentine. 
4. Carex comosa Boott. 
Swampy places in the eastern part of the state. Beatrice; Kennedy; 
Oasis; Simeon. 
5. Carex squarrosa L. 
Swampy places in the eastern part of the state. Lincoln. 
6. Carex trichocarpa Muhl. 
In wet meadows, especially in the eastern part of the state. Often 
forming sod. Ashland; Elmwood; Emerson; Minden; Nebraska City; 
Neligh. 
7. Carex atherodes Spreng. 
Carex aristata R. Br. 
Wet meadows in eastern part of state. Ashland; Kennedy; Mullen; 
Nemaha. 
