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Carex seorsa Howe
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Following modified from Plants Database, United States Department of Agriculture
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https://plants.usda.gov/java/profile?symbol=CASE6 ---> http://plants.usda.gov/core/profile?symbol=CASE6
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Carex seorsa Howe
weak stellate sedge

Image of Carex seorsa

General Information
Symbol: CASE6
Group: Monocot
Family: Cyperaceae
Duration: Perennial
Growth Habit : Graminoid
Native Status : CAN   N
L48   N
Data Source and Documentation
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Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
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: 379. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .




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 seorsa Howe – weak stellate 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.
Indiana weak stellate sedge Rare
Kentucky weak stellate sedge Special Concern
Michigan sedge Threatened
New Hampshire separated sedge Endangered
New York weak stellate sedge Threatened

Wetland Status

Interpreting Wetland Status

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

Related Links

More Accounts and Images
Flora of North America (CASE6)
Integrated Taxonomic Information System (CASE6)
USF Atlas of Florida Vascular Plants (CASE6)
University of Tennessee Herbarium (Distribution) (CASE6)
University of Wisconsin - Stevens Point Freckmann Herbarium (CASE6)



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 326, 328, 331 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 23 | Cyperaceae | Carex

95. Carex seorsa Howe in H. C. Gordinier and E. C. Howe, Fl. Rensselaer County N.Y. 39. 1894.

Culms 15—75 cm. Leaves 2—4 per culm; sheaths with inner band hyaline, 3.5—12 cm, apex deeply concave, glabrous; ligules 1.7—7 mm, apex acute or often emarginate; blades plicate to flat, 9—50 cm × 0.8—3.9 mm, widest leaf 2.1—3.9 mm wide. Inflorescences 1.8—7 cm; spikes 4—8; lateral spikes pistillate often with few staminate flowers proximally, 2.8—10.8 mm, sessile, staminate portion (0—)1—6-flowered, (0—)0.8—4.6 mm, pistillate portion 4—25-flowered, 2—7.6 mm; basal 2 spikes 5—27 mm apart; terminal spike gynecadrous, 4.7—16.5 mm, staminate portion 3—13-flowered, 1.8—12.7 × 0.9—2.1 mm, pistillate portion 6—23-flowered, 2.8—7.3 × 4.4—6 mm. Pistillate scales ovate, 1.2—2.2 × 1—1.6 mm, apex acute. Staminate scales ovate, 1.7—3.3 × 1—1.4 mm, apex acute. Anthers 1—1.9 mm. Perigynia spreading to reflexed, green, 6—14-veined abaxially, 0—6-veined adaxially over achene, elliptic to elliptic-ovate, 1.8—2.9 × 1—1.9 mm, 1.2—2.1 times as long as wide; beak 0.2—0.6 mm, 0.09—0.33 length of body, smooth. Achenes ovate to orbiculate, 1.2—1.6 × 0.85—1.4 mm.

Fruiting late spring—early summer. Acidic, sandy, peaty hardwood or Chamaecyparis swamps, thickets; 0—300 m; Ont.; Ala., Ark., Conn., Del., D.C., Fla., Ga., Ind., Ky., Md., Mass., Mich., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va.

Carex seorsa very rarely hybridizes with C. atlantica subsp. atlantica.

Carex seorsa is unusual in sect. Stellulatae in its primarily forest understory habitat, lax, spreading habit, perigynia widest in the middle, and smooth perigynia beaks. Its affinities require further study.

Updated: 2019-09-17 21:24:43 gmt
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