Whitney's Sedge

Culms 25–100 cm. Leaves: sheath fronts brownish; blades 2–6 mm wide. Spikes: proximal pistillate spikes white, ovate, 7–30 × 5–9 mm, ciliate distally; terminal spike white-hyaline, tinged red-brown, ovate, 5–30 × 2–4 mm. Perigynia green, ca. 5-veined, 3.7–5.5 × 1.5–2.5 mm; beak tip with narrow, white margins. Achenes ovoid to obovoid, 2.8–3.9 × 1.7–2.4 mm.

Calif., Nev., Oreg.

Fruiting summer.

Dry, sandy and gravelly meadows, open forests; 1200–3400m.

Carex flaccifolia Mackenzie; C. jepsonii J. T. Howell

Carex flaccifolia Mackenzie, Erythea 8: 92. 1922
Rootstocks not seen; culms 6-9 dm. high, slender, weak, sharply triangular, much exceeding leaves, aphyllopodic, sparingly pubescent, not roughened on the angles, dull-lightbrownish at base; leaves with well-developed blades 2-4 to a culm, on lower fourth, but not bunched, not septate-nodulose, the blades flat, flaccid, pubescent on both sides, 0.5-2.5 dm. long, 2-3.5 mm. wide, the mid-lateral nerves prominent above, the sheaths white-pubescent, tight, white-hyaline ventrally, deep-concave at mouth, the ligule conspicuous, longer than wide; staminate spike sessile or short-peduncled, 1-2.5 cm. long, 2-4 mm. wide, the scales appressed, oblong-obovate, obtuse or slightly cuspidate, whitish and more or less dull-yellowishbrown-tinged, the margins hyaline, the center 1-3-nerved; pistillate spikes 2 or 3, approximate, erect, sessile or short-peduncled, oblong, 12-25 mm. long, 6-9 mm. wide, with 12-25 ascending perigynia, not closely arranged, in few rows; bracts leaflet-like, the lowest very short-sheathing, the upper sheathless, the blade of the lowest equaling or exceeded by the inflorescence; scales spreading, ovate, short-cuspidate to acute, about width of and usually somewhat shorter but sometimes somewhat longer than mature perigynia, the body strongly white-hyaline-margined, the apex slightly ciliate-serrulate, the center green, prominently 3-5nerved; perigynia ovoid, 3.5-4.25 mm. long, 2.25 mm. wide, sharply triangular, glabrous, membranaceous, dull-green, puncticulate, strongly several-nerved on each side, round-tapering at base, short-tapering at apex and abruptly short-beaked, the beak 0.25 mm. long, the orifice hyaline, oblique or becoming bidentulate; achenes oval-ovoid, 3.25 mm. long, 2 mm. wide, triangular with concave sides, light-brown, the superficial cells conspicuous, closely enveloped, sessile, apiculate, jointed with the very short (0.5 mm. long) straight style; stigmas 3, rather slender, short.
Type locality: Southwestern California, George B. Grant (U. S. Nat. Herb. no. 468192). Distribution: Said to occur on dry sunny plains in southwestern California, no definite station given. Known only from the type specimen.

Carex whitneyi Olney, Proc. Am. Acad. 7: 394. 1868
Carex pilosiuscula Bock. Flora 65: 61. 1882. (Type from salt plains of the Rocky Mountains.) Not C. pilosiuscula Gobi, 1876.
Densely cespitose, from stout rootstocks, the clumps medium-sized, the culms usually 2.5-5 dm. (or even 10 dm.) high, rather stiff but slender, exceeding the leaves, aphyllopodic, sharply triangular, not at all or but little roughened on the angles, purplish-brown-tinged at base ; leaves with well-developed blades usually 3-5 to a fertile culm, on lower fourth but not bunched, not septate-nodulose, the blades flat with revolute margins, usually 1-2 dm. long, 2.5-8 mm. wide, soft-pubescent on both surfaces, long-acuminate, thin, not stiff, the midlateral nerves prominent above, the sheaths cinnamon-brown-tinged ventrally, concave at mouth, the ligule conspicuous, longer than wide; terminal spike staminate, linear, erect, shortpeduncled, 5-30 mm. long, 2-4 mm. wide, the scales appressed, ovate, obtuse to acutish, whitish and more or less reddish-brown-tinged with 3-ribbed greenish center; pistillate spikes 2 or 3, approximate, or the lowest considerably separated, erect, sessile or short-peduncled, oblong or linear-oblong, or the uppermost short, 7-30 mm. long, 5-7 mm. wide, the 5-30 perigynia ascending, closely arranged in few rows; bracts well-developed with very short (1-5 mm. long) sheaths, the blade of the lowest leaf-like, 2-12 cm. long, from shorter than to somewhat exceeding the inflorescence; upper bracts reduced; scales appressed, ovate, short-cuspidate to acute, about the width of and from shorter to longer than the mature perigynia, sparingly ciliate-serrulate above, whitish with 3-nerved green center, the margins often chestnut-browntinged; perigynia elliptic-ovoid or elliptic-obovoid, 3.75-5 mm. long, 2 mm. wide, sharply triangular, slightly flattened, glabrous, membranaceous, light-green, puncticulate, about 5nerved or 5-ribbed on each side, round-tapering at base and substipitate, tapering or contracted into a smooth short (0.5-0.75 mm. long) beak, with obliquely cut, white-hyaline orifice at length minutely bidentate; achenes oval-obovoid or oval-ovoid, 3 mm. long, 1.8 mm. wide, triangular with concave sides, closely enveloped, substipitate, pointed at apex and minutely apiculate, jointed witn the very short, somewhat thickish style; stigmas 3, slender, reddishbrown.
Type locality: "California, Yosemite Valley, Brewer 1639, Bolander 6198, Hillebrand 2305, 2308, 2314; Mount Dana, 12000 feet, Bolander 5086; Soda Springs, 9000 feet, Brewer 1778."
Distribution: Southern Oregon and northern California, and southward in the Sierra Nevada mountains to Tulare County, California. Erroneously recorded from Colorado by Kukenthal (in Engler, Pflanzenreich 4 20 : 581). (Specimens examined from all parts of the range as above given.)

Carex whitneyi est une espèce des plantes du genre Carex et de la famille des Cyperaceae.

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

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