310 



CYPERACEAE 



65. Carex Integra Mackenzie. 



Smooth-beaked Sedge. 



Fig-. 741. 



Care.v intcgra Mackenzie, Bull. Torrey Club 43: 60S. 1917. 



Very densely cespitose, the culms 1.5-3.5 dm. high, slender but 

 erect, smooth. Leaf-blades 1-2 mm. wide ; head 1-2 cm. long, the 

 spikes 4-8, gynaecandrous, densely aggregated, obovoid or oblong- 

 obovoid, 4-8 mm. long, 3.5-5 mm. wide, the 10-20 perigynia appressed 

 or appressed-ascending; lowest bract somewhat developed; scales 

 ovate, acute or short cuspidate, shorter than perigynia, dark chestnut 

 with prominent midvein and in age hyaline margins ; perigynia 

 lanceolate, thickish, plano-convex, very small, 2.25-2.75 mm. long, 

 0.75-1 mm. wide, brownish tinged, lightly few nerved dorsally, nerve- 

 less or very obscurely nerved ventrally, narrowly margined to the 

 round-tapering base, more or less contracted into the slender beak 

 half length of body or more, the margins smooth, chestnut-brown 

 tipped with white hyaline orifice and obliquely cut dorsally ; achenes 

 lenticular jointed with the slender style; stigmas 2. 



In the Sierra Nevada of California, known from Tulare to Siskiyou Counties, 



1 and extending north in the Cascade Mountains of Oregon, Transition Zone. Type 



2 locality: Summit, Placer County, California. 



i» 66. Carex teneraeformis Mackenzie. 



Sierra Slender Sedge. Fig. 742. 



Carex teneraeformis Mackenzie, Bull. Torrey Club 43: 609. 1917. 



Cespitose. the culms 3-4.5 dm. high, very slender, smooth or 

 nearly so. Leaf-blades deep green, 1-2.5 mm. wide; head 1.5- 

 2.5 cm. long, the spikes 5-8, gynaecandrous, readily distinguishable 

 and more or less separate, 3.5-6 mm. long, 3.5-4.5 mm. wide, the 

 6-12 perigynia loosely appressed or spreading-ascending ; lowest 

 bract some'what developed; scales ovate, acute, shorter than peri- 

 gynia. light brown with lighter midvein and inconspicuous hyaline 

 margins ; perigvnia ovate, plano-convex, green, 3.25 mm. long, 1.25 

 mm. wide, thickish, winged to base, the walls submembranaceous, 

 conspicuously several nerved on outer face, nerveless or nearly so 

 on inner, rounded at- base, serrulate above, tapering into a slender 

 white hyaline-tipped beak 1 mm. long, obliquely cut dorsally, the 

 tip terete and scarcely serrulate; achenes lenticular, jointed with 

 slender style ; stigmas 2. 



In the Sierra Nevada of California, Transition Zone; Butte to Tulare Coun- 

 ties; also on Mount Sanhedrin, Lake County. Type locality: Jonesville, Butte 

 County, California. 



67. Carex subfusca W. Boott. 

 Rusty Sedge. Fig. 743. 



Carex subfusca W. Boott in S. Wats. Bot. Calif. 2: 234. 1880. 

 Carex madoviana subfusca (W. Boott) Kiikenth. in Engler Pflanzenreich 4=": 

 197. 1909. 



Cespitose, the culms 2-6.5 dm. high, slender but firm, smooth or 

 very nearly so. Leaf-blades 1.5-3 mm. wide; head oblong or ovoid, 

 1-2 cm. long, the spikes 4-8, gynaecandrous, well-defined but closely 

 aggregated, ovoid or oblong, 4-10 mm. long, 2.5-4.5 mm. wide, 

 rounded at apex, rounded or somewhat tapering at base, the 8-15 

 perigynia appressed-ascending; bracts little developed; scales shorter 

 than perigynia, ovate, acute, brownish with lighter midvein and 

 inconspicuous hyaline margins ; perigynia ovate, 3-3.5 mm. long, 

 1-1.5 mm. wide, plano-convex, thickish, winged to the rounded base, 

 serrulate above, nerved ventrally, contracted into a beak half the 

 length of the body or more, somewhat flattened nearly to apex and 

 obliquely cut dorsally; achenes lenticular; style slender, jointed with 

 achenes ; stigmas 2. 



Mountains and foothills. Transition and Canadian Zones; Oregon to southern 

 California, and eastward to Arizona. Type locality: Lake Tahoe. 



