Yosemite Sedge

Plants cespitose; rhizomes short. Culms central, trigonous, 45–130 cm, smooth. Leaves: basal sheaths reddish purple tinged, pubescent; ligules 3–17 mm; blades green, M-shaped, 4–9 mm wide, pubescent on both blade surfaces and apex of inner band of distalmost sheaths. Inflorescences 4–17 cm; proximal 3–4(–5) spikes pistillate, ascending; distal spikes erect; terminal spike staminate. Pistillate scales lanceolate to ovate, apex acute, pubescent abaxially, ciliate. Perigynia ascending to spreading, greenish to brown, sometimes purplish tinged on beak, prominently 2-ribbed and faintly 6–10-veined, broadly ovoid, 2.3–3.7 × 1.2–1.8 mm, pubescent; beak 0.4–1 mm, ± hyaline, friable, ± irregularly bidentulate or erose, ciliate.

Calif.

Fruiting Jun–Aug.

Moist to wet meadows and open forests, lakeshores, stream banks; 1200–2600m.

Carex yosemitana L. H. Bailey

Carex sartwelliana Olney, Proc. Am. Acad. 7: 396. 1868
Carex yosemitana L. H. Bailey, Mem. Torrey Club 1: 8. 1889. (Change of name only.)
Carex Congdonii L. H. Bailey, Bot. Gaz. 21: 6. 1896. (Type from Tuolumne County, California.)
Cespitose from stout rootstocks with short-ascending stolons, the culms rather stout, rather stiff, 3-9 dm. high, phyllopodic, much exceeding leaves, sharply triangular and slightly roughened above, brownish or purplish-red and not fibrillose at base, the basal sheaths not breaking and becoming filamentose, the sterile shoots elongate, the leaves clustered towards apex; leaves with well-developed blades 8-15 to a fertile culm, clustered on lower third, softly pubescent, not septate-nodulose, the blades light-green, not rigid, flat with revolute margins or channeled towards the base, usually 1-3.5 dm. long, 3-7 mm. wide, strongly roughened towards the attenuate apex; sheaths strongly cinnamon-brown-tinged and red-dotted ventrally, concave at mouth, the ligule longer than wide; terminal spike staminate, or occasionally with a few perigynia, more or less peduncled, linear or linear-clavate, 12-30 mm. long, 4.5-6 mm. wide, the scales narrowly oblong-obovate, conspicuously white-ciliate, obtuse, purplish-brown with straw-colored center and narrow hyaline margins; pistillate spikes 3 or 4, approximate or somewhat separate, erect, sessile or slightly peduncled, oblong-cylindric, 12-40 mm. long, 4.5-6 mm. wide, containing 40-200 appressed perigynia, closely packed in several to many rows; lowest bract leaf -like, very lightly sheathing, about equaling inflorescence, the upper bracts much reduced; scales ovate or ovate-lanceolate, white-ciliate and appressed-hairy, awned, mucronate, or acute, purplish-brown with white-hyaline margins and conspicuous green 3-nerved center, somewhat narrower and from shorter to longer than the perigynia; perigynia 2.5-3.5 mm. long, 1.25-1.75 mm. wide, greenish or in age straw-colored, submembranaceous, white-pilose, the body obovoid or oblong-obovoid, triangular, not inflated, tworidged and obscurely nerved, short-tapering at base, short-stipitate, abruptly beaked, the beak 1 mm. long, slender, conic, hyaline-tipped, obliquely cut, at length minutely bidentate; achenes broadly obovoid, 1.5 mm. long, 1-1.5 mm. wide, closely enveloped, triangular with concave sides and blunt angles, substipitate, yellowish, granular, abruptly short-apiculate, jointed with the short, rather slender style; stigmas 3, dull reddish-brown, slender.
Type locality: "California, Yosemite Valley, alt. 6000 feet, Brewer 1636; Bolander 6221."
Distribution: Mountains of California; Sierra Nevada from Tuolumne to Tulare counties and in the San Jacinto mountains. (Specimens examined showing above range.)

Carex sartwelliana adalah spesies tumbuhan seperti rumput yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Carex sartwelliana sendiri merupakan bagian dari genus Carex. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Olney.

Carex sartwelliana là một loài thực vật có hoa trong họ Cói. Loài này được Olney mô tả khoa học đầu tiên năm 1868.