298 



CYPERACEAE 



29. Carex nervina Bailey. 

 Sierra Nerved Sedge. Fig. 705. 



Carc.v nervina Bailey, Bot. Gaz. 10: 203. pi. 3, f. 68. 18S5. 



Cespitose from somewhat elongated stout rootstocks, the 

 culms 3-9 dm. high, strongly aphyllopodic, flattened in drying, 

 weak, roughened above, about equaling the leaves. Well-devel- 

 oped leaves on lower fourth of culms, the blades 3.5-5 mm. 

 wide ; opaque part of sheath olive-tinged, not cross-rugulose, 

 truncate or concave at the mouth, green and white-mottled dor- 

 sally, spikes androgynous in a dense ovoid or oblong head 1.3- 

 3 cm. long. 8-10 mm. wide, the larger with about 6-12 ascending 

 or at length spreading perigynia, the staminate flowers not 

 conspicuous ; bracts little developed ; scales ovate, exceeded by 

 the perigynia, brownish with green center and hyaline margins ; 

 perigynia plano-convex, lanceolate, or ovate-lanceolate, 3.5-4 mm. 

 long, 1.5-1.75 mm. wide, rounded short-stipitate and strongly 

 spongy at base, strongly many-nerved on both faces, sharp angled 

 above, tapering into a slightly serrulate sharply bidentate beak 

 1 mm. long, the teeth erect; achenes lenticular; stigmas 2, long. 



Mountains, Transition and Canadian Zones; southern Oregon and Cali- 

 fornia, where found in the Sierra Nevada as far south as Tulare County. 

 Type locality : Summit Camp, California. 



30. Carex neurophora Mackenzie, n. sp. 

 Alpine Nerved Sedge. 



Fig. 706. 



Carex iiervina Mackenzie in Rydberg Fl. Rocky Mts. (in part) 123. 

 1918, not Bailey. 



Cespitose from slightly elongated rootstocks, the culms 

 Z-7 dm. high, strongly aphyllopodic, 3.5 mm. thick at base, 

 little roughened above, exceeding the leaves. Well developed 

 leaves on lower fourth of culms, the blades about 3.5 mm. 

 wide, the sheaths green and white mottled dorsally, cross- 

 rugulose ventrally, thickish and convex and short-prolonged 

 at mouth ; spikes androgynous in a dense ovoid or oblong 

 head 1.5-2.5 cm. long, 8-12 mm. wide, the larger with several- 

 many at length widely spreading perigynia, the staminate 

 flowers inconspicuous; bracts not developed; scales ovate, 

 brownish with lighter midrib, about half length of perigynia ; 

 perigynia plano-convex, lanceolate, 3.5-4 mm. long, 1.5 tnm. 

 wide, rounded, short stipitate and somewhat spongy at base, 

 several-many nerved on both faces, sharp-edged above, taper- 

 ing into a slightly serrulate bidentate beak half length of 

 body, the teeth very short; achenes lenticular; stigmas 2. 



High mountains, Hudsonian Zone; Wyoming to Washington and Ore- 

 gon. Type: Stevens Pass, Cascade Mountains, Washington, Sandbcrg 

 and Leiberg, 773. 



31. Carex stipata Muhl. 



Awl-fruited Sedge. 



Fig. 707. 



Care.y stipata Muhl. in Willd. Sp. PI. 4: 233. 1805. 



Cespitose, the rootstocks short, stout, the culms 3-10 

 dm. high, rather weak, sharply triangular, strongly 

 serrulate above, mostly exceeding leaves. Leaves with 

 blades 4-8 mm. wide, flat, flaccid, the sheaths strongly 

 septate dorsally, the opaque part thin, quickly broken, 

 cross-rugulose, prolonged above base of blade; head 

 3-10 cm. long, yellowish brown, the spikes numerous, 

 androgynous, the lower often separate ; bracts incon- 

 spicuous ; scales ovate-triangular, about length of body 

 of perig>-nia. light brownish with light midvein and 

 hyaline margins ; perigynia lanceolate, plano-convex, 

 4-5 mm. long, 1.5 mm. wide, strongly nerved dorsally, 

 less strongly ventrally, yellowish green or at length 

 brownish, round cordate, spongy and stipitate at base, 

 narrowly margined ventrally, tapering into a serrulate 

 bidentate beak nearly equalling or longer than the body ; 

 achenes lenticular ; stigmas 2. 



Swamps and wet meadows. Transition Zone; Newfoundland to 

 North Carolina west to middle California and southern Alaska. 

 Type locality: Pennsylvania. 



