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Carex willdenowii Schkuhr ex Willd.
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Carex willdenowii Schkuhr ex Willd.
Willdenow's sedge

Image of Carex willdenowii

General Information
Symbol: CAWI2
Group: Monocot
Family: Cyperaceae
Duration: Perennial
Growth Habit : Graminoid
Native Status : CAN   N
L48   N
Data Source and Documentation
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Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Carex thumbnails at the Plants Gallery

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 1: 387. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .



Symbol Scientific Name Other Common Names
CAWIW Carex willdenowii Schkuhr ex Willd. var. willdenowii Willdenow's sedge


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Commelinidae
Order Cyperales
Family Cyperaceae – Sedge family
Genus Carex L. – sedge
Species Carex willdenowii Schkuhr ex Willd. – Willdenow's sedge

Subordinate Taxa

This plant has no children

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Connecticut Willdenow's sedge Special Concern
Illinois Willdenow's sedge Threatened
New York Willdenow's sedge Threatened

Wetland Status

Interpreting Wetland Status

North America
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont UPL
Midwest FACU
Northcentral & Northeast UPL

Related Links

More Accounts and Images
Flora of North America (CAWI2)
Integrated Taxonomic Information System (CAWI2)
Integrated Taxonomic Information System (CAWIW)
University of Tennessee Herbarium (Distribution) (CAWI2)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

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Following modified from Flora of North America
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Link to Flora of North America home
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FNA Vol. 23 Page 559 , 560 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

458. Carex willdenowii Schkuhr ex Willdenow, Sp. Pl. 4(1): 211. 1805.

Willdenow's sedge

Culms erect or spreading, (3.1—)8.2—29.7 cm, 0.4—0.9 of total plant height. Leaves: basal sheaths pale to medium brown; blades green, exceeding culms, 1.3—3.2 mm wide, herbaceous, margins green, smooth or slightly scabrous. Lateral spikes (0—)2—4, basal, on widely spreading to nodding peduncles. Terminal spike with staminate portion 3—29-flowered, 3.4—8.6(—10.3) × 0.7—1.4 mm; pistillate portion 3—9-flowered. Pistillate scales green, margins hyaline, white, often with reddish brown tinge, 1.6—2.22 mm wide, not more than 1.5 times as wide as and not concealing perigynia, apex attenuate into green awns; distal scales with hyaline margins 0.3—0.8 mm, apex acute, awnless. Staminate scales green or tinged with brown subapically, 1.4—2.8 × 1.8—2.2 mm, margins free but enfolding scales above, hyaline, white, apex obtuse, erose. Anthers 0.9—1.1 mm. Perigynia 3—9 per spike, pale green to olive or pale brown, unspeckled, narrowly ovoid to lance-ovoid, (4.5—)4.9—5.7(—6.5) × 1.2—1.7 mm, 1.2—2.2 times as long as wide, tightly enveloping achenes, apex gradually tapering; beak (1.7—)1.9—2.6(—2.8) mm, scabrous. Stigmas filiform, flexuous, long, slender, strongly papillose. Achenes brown, oblong, (1.8—)2.1—2.5(—2.6) × (1.2—)1.3—1.5(—1.6) mm. 2n = 62, 78.

Fruiting spring—summer (late Apr—late Jul). Acidic, dry mesic, open, oak-dominated woodlands, often on ridges and slopes; 50—900 m; Ont.; Ala., Ark., Conn., Del., D.C., Ill., Ind., Ky., Md., Mass., Mo., N.J., N.Y., N.C., Ohio, Pa., S.C., Tenn., Vt., Va., W.Va.

The Carex willdenowii group (C. willdenowii, C. basiantha & C. superata) differs from the other members of the section in having asynchronous spike production, resulting in a protracted fruiting season (R. F. C. Naczi et al. 1998).

Updated: 2019-09-18 11:45:15 gmt
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