Comments
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See note under 146. Carex longii.
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Description
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Plants densely cespitose. Culms 50–110 cm; vegetative culms with numerous leaves spaced evenly along distal 1/2. Leaves: sheaths adaxially green-veined nearly to collar, with ± triangular white-hyaline area to 3–8 mm proximal to collar, somewhat loose, expanded near summits, ± wing-angled, adaxially firm, summits U-shaped, somewhat thickened, slightly prolonged beyond collar; distal ligules 4–8(–12) mm; blades 4–10 per fertile culm, 15–40 cm × (2–)3–7 mm. Inflorescences erect, dense distally, brown, 2–5(–8) cm × 10–20 mm; proximal internode 2–20 mm; 2d internode 2–13 mm; proximal bracts bristlelike, 1(–8) cm. Spikes 6–15, overlapping or distinct, ovoid-oblong to globose, 6–12(–16) × 4–8 mm, base rounded to tapered, apex rounded. Pistillate scales white-hyaline or pale silvery brown with green midstripe, lanceolate, (1.9–)2.5–3 mm, 1/2 length of and narrower than perigynia, apex acute to acuminate. Perigynia more than (30–)40 per spike, appressed-ascending to ascending, pale green to pale brown, 3–6-veined abaxially, conspicuously or, occasionally, faintly, 2–4-veined adaxially, often somewhat asymmetric, ovate-lanceolate to ovate-elliptic, plano-convex, 3–5.4 × 1.1–1.7 mm, 0.3–0.5 mm thick, margin flat, including wing 0.1–0.5 mm wide; beak tip flat, ciliate-serrulate, abaxial suture with golden to dark brown hyaline margin, distance from beak tip to achene 1.4–2 mm. Achenes oblong-ovate, 1–1.8 × 0.6–0.9 mm, 0.3–0.5 mm thick. 2n = 70.
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Comprehensive Description
provided by North American Flora
Carex tribuloides Wahl. Sv. Vet.-Akad. Nya Handl 24: 145. 1803.
Carex lagopodioides Schkuhr; Willd. Sp. PI. 4: 230. 1805. (Type from "America boreali .") Carex scoparia var. lagopodioides Torr. Ann. Lye. N. Y. 3: 394. 1836. (Based on C. lagopodioides
Schkuhr.) Carex lagopodioides f. glomerala Olney, Caric. Bor.-Am. 2, name only. 1871.
Cespitose, from short, blackish, fibrillose rootstocks, the culms 6-9 dm. high, strict, stoutish or slender, firm, exceeding the leaves, sharply triangular with concave sides, strongly roughened on the angles beneath the head, clothed at base with the dried-up leaves of the previous year, the lower bladeless, the lower nodes exposed ; leaves with well-developed blades usually 4-10 to a fertile culm, on the lower half or two thirds, but not at all clustered, the blades fiat with revolute margins, usually 2-4 dm. long, 2.5-7 mm. wide, light-green or yellowish-green, rather stiff, roughened especially on the margins and towards the apex, the sheaths loose, green-striate ventrally nearly to mouth, slightly thickened, white-hyaline, deeply or shallowly concave, and often with a dark band at mouth, short-prolonged beyond base of blade and continuous with ligule, the latter much longer than wide; sterile shoots elongate, with many widely spreading leaves; inflorescence consisting of 6-15 well-defined spikes aggregated into an oblong-linear to oblong-ovoid head 2.5-5 cm. long, 1-2 cm. thick, the spikes gynaecandrous, ovoid-oblong to subglobose, ascending or erect, straw-colored or greenish, 6-12 mm. long, 4-8 mm. wide, usually very blunt at apex, rounded or subclavate-tapering at base, the basal staminate flowers inconspicuous, the numerous perigynia erect-ascending, their tips appressed or ascending, the beaks of the uppermost only conspicuous; lower bract often present, setaceous, from shorter than to exceeding the head; upper bracts scale-like; scales lanceolate or ovate-lanceolate, light-yellowish-brown with conspicuous white-hyaline margins and prominent 3-nerved green center, acute or short-acuminate, narrower than and from half to two thirds the length of the perigynia; perigynia very flattened-plano-convex, ovate-lanceolate, 3-5 mm. long, about 1-1.5 mm. wide, more or less distended over the achene, strongly wing-margined and serrulate to below the middle, somewhat abruptly contracted into a narrower wing-margin extending to the base, membranaceous, greenish or soon straw-colored, the wings pellucid, severalto many-nerved on both sides, short-stipitate, round-tapering at base, tapering into a beak about one third the length of the whole, flat, serrulate, obliquely cut dorsally, bidentate, the margins of the orifice white-hyalire; achenes lenticular, oblong-oval, 1.5 mm. long, 0.5-0.75 mm. wide, short-stipitate, apiculate; style slender, straight, jointed with achene, at length deciduous; stigmas two, slender, dark-reddish-brown. Type locality: "Hab. in America boreali, Kalm: ex herbar Cel. Swartzii."
Distribution: Wet meadows. Quebec to Minnesota. Florida, and Louisiana. (Specimens examined from Quebec. Maine. New Hampshire, Vermont, Massachusetts. Rhode Island. Connecticut. New York. New Jersey. Pennsylvania, Delaware. Maryland, District of Columbia, Virginia, West Virginia. North Carolina. South Carolina. Georgia. Florida, Louisiana. Ontario, Ohio, Michigan. Indiana. Kentucky. Tennessee. Illinois. Wisconsin. Minnesota. Iowa. Missouri. Arkansas. ( >klahoma. i
- bibliographic citation
- Kenneth Kent Mackenzie. 1931. (POALES); CYPERACEAE; CARICEAE. North American flora. vol 18(3). New York Botanical Garden, New York, NY
Carex tribuloides: Brief Summary
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Carex tribuloides, the blunt broom sedge, is a species of flowering plant in the genus Carex, native to the eastern United States, eastern Canada, and Veracruz in Mexico, and introduced in Sweden. It is an important food for soras (Porzana carolina) during their spring migration.
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