Carex occidentalis L. H. Bailey

There are questionable records from central Mexico of Carex occidentalis, which is otherwise endemic to the flora area.

Plants without conspicuous rhizomes. Culms 25–90 cm, 1.6–2 mm wide basally, 0.6–0.7 mm wide distally. Leaves: sheaths tight, green, fronts hyaline; ligules less than 2 mm, as long as wide; widest leaf blades 1.5–2.5(–3) mm wide. Inflorescences with 4–10 spikes, 1.5–3.5 cm × 6–10 mm; proximal internodes as long as to slightly longer than proximal spikes, rarely 2 times as long; proximal bracts to 3 cm; spikes with 3–10 ascending to spreading perigynia. Pistillate scales brown with green, 3-veined center, ovate, 3.4–4 × 1.6–2 mm, body wider than and as long as perigynium, apex acuminate to short-awned, awn less than 1 mm. Anthers 2.5 mm. Perigynia brown, sometimes with green margins, faces obscurely veined, 2.5–4.5 × 1.5–1.9 mm, base of body somewhat spongy, margins serrulate distally; beak 0.6–1.3 mm, apical teeth 0.2–0.3 mm. Stigmas straight, 0.07 mm wide. Achenes elliptic-circular, 1.9–2 × 1.5–1.6 mm.

Ariz., Calif., Colo., Mont., Nev., N.Mex., N.Dak., S.Dak., Tex., Utah, Wyo.

Fruiting spring–early summer.

Dry grasslands, forests; 1200–3500m.

Carex occidentalis L. H. Bailey, Mem. Torrey Club 1: 14. 1889
"Carex muricata L." Olney, in S. Wats. Bot. King's Expl. 362, in part. 1871; W. Boott, in Rothr. Hot. Wheeler's Surv. 277. 1878; L. H. Bailey, in Coult. Man, 390. 1885.
Carex muricata vslt. americana L. H. Bailey, Proc. Am. Acad. 22: 140. 1886. (Type from Colorado to New Mexico and Arizona.)
Carex neo-mexicana Mackenzie, Bull. Torrey Club 34: 153. 1907. (Type from New Mexico.)
Carex Hookerana vdT. occidentalis Kiikenth. in Engler. Pflanzenreich 4'": 162. 1909. (Based on C. occidentalis L. H. Bailey.)
Rootstocks conspicuously short-creeping, black, fibrillose, stout and tough, the culms rather slender but stiff, sharply triangular, 2.5-7 dm. high, exceeding the leaves, roughened above, dark-brown-tinged at base; leaves with well-developed blades about 3 to a culm, the blades light-green, erect-ascending, 1-2.5 dm. long, 1.5-2.5 mm. .wide, flat, the margins slightly revolute, roughened especially on the margins, the sheaths tight, not septate-nodulose nor cross-rugulose, thin and concave and not thickened at mouth, the ligide longer than wide; spikes 5-10, the lower one or two little separate, the upper aggregated and undistinguis'iable, the whole head stiff but rather slender, oblong or linear-oblong, 1.5-3 cm. long, 6-8 mith ck, each spike bearing the few inconspicuous staminate flowers above and the few (10 or less) loosely a.scending or in age spreading-ascending perigynia at ba.se; bracts when present usually much shorter than the head, somewhat enlarged at base and with a short cusp, or a iiuiinate; scales ovate-triangular, the bodies brownish with opaque margins and green 3-nerved center, acuminate to short-awned, rather wider than and about the length of and largely concealing the perigynia; perigynia plano-convex, oblong-elliptic, 2.5-3.5 mm. long, 1.75 mm. wide, light-green or in age brownish, submembranaceous, flat or slightly convex and sharp-edged to base ventrally, the margins serrulate at base of beak only, very obscurely nerved on both sides, stipitate, somewhat spongy and round-tapering at base, abruptly narrowed into a serrulate beak usually about one third the length of the body of the perigyniura, bidentate, the teeth short, triangular, the sutures not conspicuous; achenes lenticular, oblongorbicular, 2 mm. long, 1.5 mm. wide, apiculate, substipitate ; style slender, straight, short, enlarged at base, jointed with achene; stigmas two, slender, light-reddish-brown, elongate.
Type locality: "Mountains. Montana to Arizona."
Distribution: Dry places, Wyoming to Utah, and southward to New Mexico and Arizona. (Specimens examined from Wyoming, Colorado, Utah, Nevada, New Mexico, Arizona.)

Carex occidentalis (lat. Carex occidentalis) - cilkimilər fəsiləsinin cil cinsinə aid bitki növü.

Carex occidentalis is a species of sedge known by the common name western sedge. It is native to the southwestern United States and parts of the west as far north as Montana. It grows mainly in dry habitat such as woodland and grassland. The plant produces very narrow stems up to about 90 centimeters in maximum height, sometimes with rhizomes. The inflorescence produces a cluster of several rounded flower spikes. The pistillate flowers are covered in scales which are brown with green, three-veined centers.

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

Carex occidentalis là một loài thực vật có hoa trong họ Cói. Loài này được L.H.Bailey mô tả khoa học đầu tiên năm 1889.