226 FLORA. 



188. Carex praticola Rydb. NORTHERN MEADOW SEDGE. (I. F. f. 858.) 

 Light green ; culms erect when young, the summit later nodding, nearly smooth, 

 3-4 dm, tall. Leaves about 2 mm. wide, shorter than the culm ; lower bracts 

 bristle-form; spikes 3-6, oblong or club-shaped, silvery-brown and shining, 6-10 mm. 

 long, about 5 mm. in diameter ; perigynia lanceolate, pale, nerveless on the inner 

 face, few-nerved on the outer, 5 mm. long, wing-margined, tapering into a beak 

 nearly as long as the body ; scales membranous, lanceolate, acute or acuminate. 

 Lab. to Ont., Mich., Manitoba and Alaska, south in the Rocky Mountains to Colo. 

 Summer. (C. pratensis Drej. not Hose.) 



189. Carex xerantica Bailey. WHITE-SCALED SEDGE. (I. F. f. 859.) 

 Similar to the preceding, but the culms stout, stiff and strictly erect, even when 

 mature. Leaves about 2 mm. wide, involute in drying, shorter than the culm; 

 spikes about 5, oblong, close together, 8-12 mm. long; perigynia lanceolate, pale, 

 5 mm. long, nerveless, conspicuously wing-margined, the inner face concave, the 

 rough tapering beak about as long as the body; scales silvery white, lanceolate, 

 acute or acuminate. W. Manitoba and adjacent N. W. Terr. May-July. 



190. Carex siccata Dewey. DRY-SPIKED SEDGE. HILLSIDE SEDGE. (I. F. 

 f. 860.) Rootstocks long and stout; culms slender, rough above, 26 dm. tall. 

 Leaves erect, about 2 mm. wide; spikes 3-6, oblong or subglobose, 5-8 mm. long, 

 brownish or brown, the staminate flowers basal, or variously situated, or whole 

 spikes staminate; perigynia ovate- lanceolate, firm, about 5 mm. long, wing-mar- 

 gined, strongly several-nerved on both sides, the inner face concave by the in- 

 curved margins, the tapering rough beak nearly as long as the body; scales ovate- 

 lanceolate, membranous, acute or acuminate. In dry fields and on hills, Ont. and 

 Manitoba to Br. Col., R. I., N. Y., Mich., Ariz, and Cal. May-July. 



191. Carex Muskingumensis Schwein. MUSKINGUM SEDGE. (I. F. f. 

 861.) Culm stout, stiff, very rough above, 5-9 dm. tall. Leaves flat, long- 

 pointed, 3-5 mm. wide, shorter than the fertile culms, those of sterile culms 

 crowded near the summit; bracts short and scale-like; spikes 6-12, oblong- 

 cylindric, 1.2-2.5 cm. long, erect, close together, pale brown; perigynia narrowly 

 lanceolate, about 8 mm. long and rather less than I mm. wide, strongly several- 

 nerved, flat, narrowed to both ends, scarious-margined, rough-ciliate, the tapering 

 2-toothed beak at least as long as the body; scales lanceolate, acuminate, one- 

 third to one-half as long as the perigynia. In moist woods and thickets, Ohio to 

 Mich., Manitoba and Mo. June-Aug. 



192. Carex tribuloides Wahl. BLUNT BROOM SEDGE. (I. F. f. 862.) 

 Bright green; culms erect, roughish above, 2-9 dm. tall. Leaves flat, 2-6 mm. 

 wide; lower bract bristle-form; spikes 6-20, oblong or top-shaped, blunt, 6-12 mm. 

 long; perigynia lanceolate, greenish brown, flat, 4-5 mm. long, 1-2 mm. wide, 

 several-nerved on each face, with a sharply 2-toothed, rough wing-margined beak; 

 scales lanceolate, whitish, acute, about half as long as the perigynia. In meadows, 

 N. B. to Manitoba, Fla. and Ariz. July-Sept. 



Carex tribuloides Bebbii Bailey. More slender, spikes fewer, smaller, about 6 mm. 

 long, commonly bractless, mostly clustered in a dense head; perigynia broader and 

 shorter. Range of the type. 



Carex tribuloides monilif6rmis (Tuckerm.) Britton. Slender, the culm much ex- 

 ceeding the leaves; spikes all or all but the uppermost separated, 5-8 mm. long, the 

 rachis somewhat zigzag. Me. and N. B. to N. Y., Iowa and N. Dak. 



193. Carex scoparia Schk. POINTED BROOM SEDGE. (I. F. f. 863.) Culms 

 slender, erect, roughish above, 1.5-7.5 dm. tall. Leaves less than 3 mm. wide; 

 spikes 3-10, oblong, narrowed at both ends, bright brown, 6-16 mm. long, 

 usually aggregated into an ovoid head; perigynia lanceolate, 4-6 mm. long, rather 

 less than 2 mm. wide, narrowly wing-margined, several-nerved on both faces, 

 tapering into the ciliate 2-toothed beak; scales thin, brown, acuminate or cuspi- 

 date, shorter than the perigynia. In moist soil, N. S. to Manitoba, Fla. and Colo. 

 July-Sept. 



194. Carex leporina L. HARE'S-FOOT SEDGE. (I. F. f. 864.) Culms 

 slender, roughish above, 3-4 dm. tall. Leaves about 2 mm. wide, flat, shorter 

 than the culm; bracts very short and scale-like or wanting; spikes 4-7, oblong, 

 blunt, 8-12 mm. long, dark brown, shining, clustered in a terminal oblong head; 



