SEDGE FAISIILY 



309 



62. Carex nubicola Mackenzie. 

 Cloud Sedge. Fig". 738. 



Carex haydcniana Olney in Bot. King Explor. 366. 1871; not C". hay- 



dcnii IJewey 1854. 

 Carex f estiva havdeniaua, W. Boott in S. Wats. Bot. Calif. 2: 234. 1880. 

 Carex festiva de'cumbcns Holm, Am. Journ. Sci. IV. 16: 20, 26. 1903. 

 Carex nubicola Mackenzie, Bull. Torrey Club 36: 480. 1909. 



Densely cespitose. the culms 1-3.5 dm. high, erect or de- 

 cumbent, smooth or nearly so. Leaf-blades 2-3 mm. wide; 

 head ovoid or globose, 12-18 mm. long, 9-18 mm. wide, con- 

 taining 4-7 densely aggregated, gynaecandrous. ovoid or sub- 

 globose spikes 5-9 mm. long, 4.5^ mm. wide, each with 15- 

 35 ascending perigynia with spreading beaks ; bracts incon- 

 spicuous ; scales ovate, acute, much narrower and shorter 

 than perigynia, blackish with Hghter center and hyaline mar- 

 gins; perigynia ovate, very flat and strongly winged. 4.5-5.5 

 mm. long, 2-2.75 mm. wide, rather weakly nerved, dark- 

 tinged, rounded at base, abruptly contracted into a serrulate 

 bidentulate beak one-half length of body ; achenes lenticular, 

 jointed with the slender style; stigmas 2. 



Summits of high mountains, Hudsonian and Arctic- Alpine Zones; 

 Alberta and Oregon south to Colorado, Utah, and California, where re- 

 corded only from Mount Dana. Type locality: Pagosa Peak, Colorado. 



63. Carex abrupta Mackenzie. 

 Abrtiptly Beaked Sedge. Fig. 739. 



Carex abrupta Mackenzie, Bull. Torrey Club 43: 618. 1917. 



Densely cespitose, the culms 4.5-6 dm. high, slender, erect, 

 smooth. Leaf-blades 1.5-2.5 mm. wide; head suborbicular, 9-16 

 mm. long and nearly as wide, the 4-8 spikes densely aggregated, 

 gynaecandrous, ovoid, 5-8 mm. long, 5-6 mm. wide, the 10-20 peri- 

 gynia ascending; bracts inconspicuous; scales ovate, obtuse, nar- 

 rower and shorter than perigynia, chestnut brown with lighter 

 center and at length hyaline margins ; perigynia oblong-lanceolate, 

 plano-conve.x but with thinnish walls, 3.75-4 mm. long, 1.5 mm, wide, 

 soon brownish tinged, conspicuously nerved both dorsally and ven- 

 trally, rather narrowly margined to the rounded base, serrulate above, 

 abruptly contracted into the slender dark tipped beak, which is 

 ol)liquely cut dorsally and hyaline at orifice ; achenes lenticular, 

 jointed with the slender style; stigmas 2. 



Mountains of Oregon and northern California and throughout the Sierra 

 Nevada, and in the San Bernardino and San Jacinto Ranges, Transition and 

 Canadian Zones. Type locality: West Branch of North Fork of Feather River, 

 near Stirling, Butte County, California. 



64. Carex mariposana Bailey. 

 Mariposa Sedge. Fig. 740. 



Carex mariposana Bailey, Bull. Torrey Club 43: 619. 1917. 



Densely cespitose, the culms 2.5-6 dm. high, slender, smooth. 

 Leaf-blades 2-3 mm. wide; head oblong or ovoid, 2-3.5 cm. 

 long, the spikes 4-12, gynaecandrous, the upper approximate, the 

 lower 1-3 slightly separate, ovoid or oblong-ovoid, 8-12 mtn. 

 long, 4.5-7 mm. wide, the 10-20 perigynia closely appressed with 

 erect tips ; bracts inconspicuous ; scales ovate, acute, narrower 

 and shorter than perigynia, reddish with lighter center; peri- 

 gynia narrowly ovate, plano-convex at maturity, the walls mem- 

 branaceous, 5 mm. long, 1.75 mm. wide, deep green or in age 

 greenish straw-colored and contrasting strongly with scales, 

 strongly nerved on both faces, narrowly winged to the round- 

 tapering base, serrulate to middle, tapering into the slender beak 

 one-fourth length of the body, the beak light reddish tipped and 

 obliquely cut dorsally; achenes lenticular, jointed to the slender 

 style ; stigmas 2. 



In the California Mountains, Transition to Canadian Zones; Shasta to 

 Tulare Counties in the Sierra Nevada and in the higher southern mountains. 

 Type locality: Tuolumne Meadows, Yosemite National Park. 



