Carex conoidea Willd.

Openfield sedge (en)

Species

Angiosperms > Poales > Cyperaceae > Carex

Characteristics

Plants densely cespitose; rhizome internodes 1.2–2.8 mm thick. Culms yellow-brown to dark brown at base, 2–75 cm. Leaves: sheaths glabrous; blades green, widest blades (2.3–)3–3.9(–5.6) mm wide, smooth abaxially or sparsely antrorsely scaberulous on main veins. Inflorescences (0.12–)0.21–0.91(–0.99) of culm height; peduncles of lateral spikes scaberulous; peduncles of terminal spikes 2.9–71(–103) mm, barely exceeded by to much exceeding lateral spikes; proximal bract sheath loose, abaxially glabrous, sheath front slightly convex, elongated 0.5–1.6 mm beyond apex; ligules 0.8–2.9(–3.7) mm; distal bract slightly shorter than to much exceeding terminal spike. Spikes (2–)3–6, widely separate or distal 2–4 overlapping or rarely all congested; lateral spikes pistillate, with (6–)18–37(–86) perigynia, 5–29 × 3.1–10.2 mm, ratio of spike length (in mm) to flower number = 0.51–0.95; terminal spikes (5–)8–26(–30) × 1–3.3(–4.2) mm. Pistillate scales 2.4–4.7 × 1.4–2.1 mm, margins red-brown to whitish, entire, apex with awn 0.2–2.7 mm or rarely awnless. Staminate scales (2.3–)2.9–4.5 × 1–1.6 mm. Anthers 1.8–3.6 mm. Perigynia spirally imbricate, 17–25-veined, unwrinkled, oblong-ovoid to oblong-obovoid, orbicular or suborbicular in cross section, (2.5–)2.8–3.6(–4.3) × (1.2–)1.3–1.7(–1.8) mm, (1.7–)1.9–2.5(–2.8) times as long as wide, lustrous, base very gradually tapered, apex gradually tapered; beak absent or straight, 0–0.2 mm. Achenes obovoid, 1.8–2.6 × (1–)1.2–1.4 mm, loosely enveloped by perigynia; stipe straight 0.1–0.3(–0.4) mm; beak straight, 0.2–0.4(–0.5) mm.
More
Tufted, 1–7 dm, the stems usually much surpassing the lvs; main lvs 2–4 mm wide; peduncles and axis of the infl scabrous; staminate spike 1–2 cm, linear, long-peduncled,usually much overtopping the uppermost pistillate spike; pistillate spikes 2–4, widely separate or the upper 2 contiguous, short-cylindric, 1–2 cm, on short rough peduncles; bracts foliaceous, the margins of their sheaths rough; pistillate scales ovate, much shorter than the perigynia, the green midvein usually excurrent into a short awn; perigynia ellipsoid, 2.5–3.8 mm, a third to two-fifths as thick; achene concavely trigonous. Moist open places; Nf. and Que. to Minn., s. to N.C. and Mo.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.03 - 0.38
Root system fibrous-root rhizome
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Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
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Nitrogen fixer -
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Environment

Light -
Soil humidity -
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Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
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Distribution

Carex conoidea world distribution map, present in Canada, Colombia, France, Micronesia (Federated States of), Malaysia, Nicaragua, and United States of America

Conservation status

Carex conoidea threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:20008102-1
WFO ID wfo-0000345678
COL ID R8QT
BDTFX ID -
INPN ID 761934
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Carex conoidea f. katahdinensis Carex conoidea Carex illinoensis Carex katahdinensis Carex granularioides Carex conoidea f. conoidea Carex tetanica