STANDLEY FLOEA OF GLACIER PARK. 301 



spikes 3 to 9; scales sMuing; perigynia appressed, ovate-lanceolate, 4 to 5 mm. long, 

 nearly nerveless ventrally, rather short-beaked. 



19. Carex festivella Mackenz. Frequent on the east slope at nearly all altitudes; 

 in moist woods or thickets or on high open slopes. Alta. to B. C, south to N. Mex., 

 Ariz., and Calif.— Leaf blades 2.5 to 4 mm. wide; spikes 3 to 8, densely aggregate; 

 scales ovate, dark reddish brown; perigynia numerous, lightly nerved ventrally, the 

 beak one-third the length of body. 



20. Carex nubicola Mackenz. Abundant in meadows and on rocky slopes above 

 timber line. Alta. to Wash., south to Colo, and Calif.— Leaf blades 2 to 3 mm. wide; 

 spikes 4 to 7, densely aggregate; scales ovate, blackish; perigynia 15 to 30, ovate, 

 nerveless ventrally, abruptly beaked, the beak half the length of body. 



21. Carex pachystachya Cham. On a moist shaded bank at the east entrance. 

 Alaska to Alta., south to Colo, and Calif.— Culms 30 to 80 cm. high; leaf blades 

 2 to 4 mm. wide; spikes 4 to 8; scales narrowly hyaline-margined; perigynia 3.5 to 4 

 mm. long, ovate, nerveless ventrally, the beak half the length of body. 



22. Carex preslii Steud. Common in deep woods at middle altitudes, and on 

 rocky slopes and in meadows above timber line. B. C. to Mont, and Oreg.— Culms 

 25 to 75 cm. high; leaf blades 1.5 to 4 mm. wide; spikes 3 to 8, well defined; scales 

 reddish brown, narrowly margined; perigynia ovate, 3.5 mm. long, abruptly beaked, 

 the beak 1 mm. long. 



' 23. Carex disperma Dewey. Frequent at low or middle altitudes, in bogs, swampy 

 woods, or wet thickets; abundant in some localities and forming dense mats of loosely 

 interlaced leaves and stems. Newf. to Alaska, south to N. J., Ind., N. Mex., and 

 Calif.; also in Eurasia.— In large clumps but rootstocks slender; culms weak, 15 to 

 60 cm. liigh; leaf blades 1 to 1.5 mm. wide; perigynia elliptic-ovoid, 2 mm. long, 

 finely nerved, the minute beak smooth. 



24. Carex lachenalii Schkuhr. Moist meadow at Sperry Glacier. Greenl. to 

 Alaska, south to Mont.; also in Eurasia.— Culms stiff, erect, 7 to 40 cm. high, rough 

 above; leaf blades 1 to 3 mm. wide; spikes 2 to 6, the terminal strongly tapering; 

 perigynia 2 to 3.5 mm. long, several-nerved, abruptly short-beaked. 



25. Carex canescens L. Open bog near Swiftcurrent Creek below Lake McDermott. 

 Lab. to Alaska, south to Va. and Calif.; also in Eurasia, S. Amer., and Australia.— 

 In large clumps, the culms 25 to 80 cm. high, slender; leaf blades 2 to 4 mm. wide, 

 glaucous; spikes 4 to 9, many-flowered; perigynia appressed-ascending, 1.8 to 2.8 

 mm. long, faintly few-nerved, minutely beaked, the orifice entire or emarginate. 



26. Carex arcta Boott. Abundant in a wet thicket at the upper end of Lake 

 McDonald. N. B. to B. C, south to N. Y., Mont., and northern Calif.— Culms 15 

 to 80 cm. liigh; leaf blades 2 to 4 mm. wide; spikes 5 to 15, many-flowered, aggregate; 

 perigynia 2 to 3 mm. long, many-nerved, ascending or somewhat spreading. 



27. Carex leptalea Wahl. Frequent on the east slope at low and middle altitudes, 

 in bogs, marshes, or low thickets. Lab. to Alaska, south to Fla., Tex., Colo., and 

 northern Calif.— Densely tufted; culms 20 to 60 cm. high, very slender; leaf blades 

 0.5 to 1.25 mm. wide; spikes 4 to 15 mm. long; perigynia 2.5 to 4.25 mm. long, oblong- 

 elliptic, membranaceous. 



28. Carex geyeri Boott. Frequent on the east slope, at middle altitudes, or above 

 timber line, on open gravelly slopes. Alta. to Wash., south to Colo., Utah, and 

 northern Calif.— Rootstock woody, elongate; culms up to 35 cm. high, very rough, 

 leaf blades thick, 2 to 3.5 mm. wide; perigynia 1 to 3.6 mm. long, obtusely triangular, 

 very minutely beaked. 



29. Carex filifolia Nutt. Hills near east entrance. Sask. to Yukon, south to Tex.. 

 N. Mex., and Wash.- Densely cespitose, the culms 8 to 30 cm. high; spike 1 to 2 cm . 



