Carex gravida L.H.Bailey

Heavy sedge (en)

Species

Angiosperms > Poales > Cyperaceae > Carex

Characteristics

Plants without conspicuous rhizomes. Culms (20–)30–100 cm, 2.5–8 mm wide basally, 0.7–1.6 mm wide distally. Leaves: sheaths usually loose, proximally green-and-white-striped, not white spotted, with conspicuous transverse veins on back, fronts hyaline, sometimes transversely rugose and red dotted, thin, white or hyaline and fragile at mouth; ligules 2–7 mm, shorter to longer than wide; widest leaf blades (3–)4–8 mm wide. Inflorescences with 5–15 spikes, 1–5 cm × 8–15 mm, occasionally compound, then somewhat larger; proximal bracts to 3 cm; spikes with 5–15 ascending to spreading perigynia; proximal internodes shorter than to 1.5 times as long as proximal spikes. Pistillate scales hyaline or brown with green, 1–3-veined center, ovate, 2.6–4.4 × 1.3–2.4 mm, body shorter to slightly longer than perigynium, apex acuminate to short-awned. Anthers 1.5–3 mm. Perigynia pale green to pale brown, veinless or 3–7(–12)-veined abaxially, rarely veined adaxially, 3.5–5.5 × 2–3 mm, body somewhat spongy, base thickened, margins serrulate distally; beak 0.6–1.6 mm, apical teeth 0.3–1 mm. Achenes circular to elliptic-circular, 1.8–2.1 × 1.6–2 mm.
More
Densely cespitose; stems 3–6 dm, rough above; lvs 4–8 mm wide, the sheath loose, ventrally thin and pale, dorsally septate-nodulose and white with green veins or mottled; infl dense, ovoid or oblong, 1–3 cm, at least the lower spikes distinguishable; bracts setaceous, shorter than the head; scales with a slender tip surpassing the base of the beak of the subtended perigynium; perigynia yellowish-brown, shining, ovate, abruptly contracted into a rough-margined, bidentate beak about a third as long as the body; achene suborbicular, the style-base expanded into an ovoid body 0.8 × 0.3–0.5 mm; 2n=58. Dry open soil and prairies; O. and sw. Ont. to Minn., S.D., and Wyo., s. to Ky. and Tex. Two weak vars.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.3 - 1.0
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

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

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Carex gravida unspecified picture

Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:292646-2
WFO ID wfo-0000347223
COL ID R9HL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Carex gravida Carex lunelliana Carex gravida f. gravida Carex gravida var. lunelliana Carex gravida var. laxifolia Carex gravida f. laxifolia Carex gravida var. gravida