Carex caroliniana Schwein.

Culms 25–80 cm, glabrescent. Leaves: sheaths pilose; ligules as long as or shorter than wide; blades 1.5–4 mm wide, glabrescent or pilose abaxially and/or proximally. Inflorescences: lateral spikes usually approximate, 7–18 × 3.5–5 mm; terminal spike gynecandrous, at least 1/2 of flowers pistillate, 12–25 mm. Pistillate scales ovate, 1.5–2.4(–3) × 0.7–1.5 mm, shorter than perigynia, apex acute to acuminate. Staminate scales oblong-ovate, 2.4–5.1 mm, apex acuminate. Anthers 1.4–2.5 mm. Perigynia spreading, 7–14-veined, obovate-circular, nearly circular in cross section, 2.1–3 × 1.1–2 mm, not papillose, glabrous or sparsely pilose; beak absent. Achenes 1.6–2.2 × 1–1.4 mm. 2n = 48.

Ark., Del., D.C., Ga., Ind., Kans., Md., Miss., Mo., N.J., N.C., Ohio, Okla., Pa., Tenn., Tex., Va., W.Va.

Fruiting late spring–early summer.

Ditches, shores; 0–500m.

Carex caroliniana Schw. Ann. Lye. N. Y. 1: 67. 1824
Carex Smithii Porter; Olney, Caric. Bor.-Am. 2, without description. 1871; Wood, Bot. & Fl. ed.
1873. 374. 1873. (Type from southeastern Pennsylvania.) Not C. Smithii Tausch, 1821. Carex gynandra var. caroliniana Olney, Caric. Bor.-Am. 5. 1871. (Based by synonymy on C.
caroliniana Schw.) Carex triceps var. Smithii Porter; L. H. Bailey, Bot. Gaz. 13: 88. 1888. (Based on C. Smithii
Porter.)
Densely cespitose, not stoloniferous, the culms slender but stiff and erect, 2.5-8 dm. high, growing in small to medium-sized clumps, glabrate, triangular with concave sides, usually much exceeded by the upper leaves, aphyllopodic, strongly reddened at base; well-developed leaves usually 4 or 5 to a culm, on the lower half (except uppermost) but not bunched, not septate-nodulose, the blades essentially glabrate, but with traces of pubescence especially below and toward the base, 1-3 dm. long, 1.5-3 mm. wide, not stiff, flat, erect-ascending, the upper culm-leaf inserted from 2-12 cm. below the inflorescence and much exceeding it; the sheaths long, tight, more or less strongly soft-hairy, truncate at mouth, reddish-brown-tinged or spotted ventrally, the ligule about as long as wide; spikes usually 3, oblong-cylindric to cylindric, 8-18 mm. long, 4 mm. wide, the uppermost gynaecandrous with its lower half staminate, the others pistillate, all approximate or the lower slightly remote, erect, sessile or slightly peduncled, closely 15-30-flowered in several rows; lowest bract about 1 mm. wide, several times the length of the inflorescence, not sheathing, the others much smaller; pistillate scales ovate-triangular, not pilose, straw-colored and slightly reddish-brown-tinged, with broad hyaline margins and 3-nerved green center, narrower and shorter than the perigynia, varying from short-cuspidate to obtuse; staminate scales straw-colored with green midrib, acuminate; perigynia obovoid-orbicular, obscurely obtusely triangular, being nearly round in cross-section, turgid and not flattened, squarrose-spreading at maturity, brownish-green, strongly few-ribbed, submembranaceous, glabrous or slightly asperulous, 2 mm. long, 1.5 mm. wide, tapering at base, abruptly tapering above and short-pointed or at times slightly beaked, the orifice entire or minutely emarginate; achenes strongly triangular with concave sides and prominent rounded angles, not entirely filling perigynium, broadly obovoid, sessile, 1.5-2 mm. long, somewhat narrower, with abruptly bent very short-apiculate tip, jointed with the very short thickish style; stigmas 3, slender, short.
Type locality: "Carol."
Distribution: Dry meadows, New Jersey and Pennsylvania to North Carolina and Texas. (Specimens examined from New Jersey, Pennsylvania, Delaware, Maryland, District of Columbia, Virginia, West Virginia, North Carolina, Ohio, Indiana, Tennessee, Missouri, Arkansas, Oklahoma,

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

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

Carex caroliniana là một loài thực vật có hoa trong họ Cói. Loài này được Schwein. mô tả khoa học đầu tiên năm 1824.