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Sheathed Flatsedge

Cyperus haspan

In the Carolinas and Georgia, found in tidal marshes, other marshes, ponded depressions, low fields, ditches, waterfowl impoundments, weed in rice fields. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you

36
Good

Native to Arkansas. How scores work Is it native here?

Profile 100%

Height
About 3.2 feet
Light
Partial shade, Full sun
Soil moisture
Wet to standing water
Will it fit your yard?

Rare or protected plant. Specialist conservation planting; excluded from routine garden suggestions. Plant caution source

Hidden from default planting suggestions. Wildlife value and native status remain unchanged.

At a glance

Bloom
July to October
Fruiting season
Summer to fall

Not yet recorded · Spread · Life cycle · Leaves

Recorded in 3 Arkansas counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 3

Freshwater marshes

Open, herb-covered wetlands with fresh, non-tidal water.

Roadsides, fields and disturbed ground

Ground opened by people: roadsides, old fields, pastures, fencerows and lots.

Ponds, lakes and their shores

Still water and its edges: ponds, lakes, millponds and reservoirs.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

6CaterpillarsGenus host records with ranges including AR

Genus host records with ranges including AR · Cyperus

  • Bactra verutanaJavelin Moth
  • Diploschizia impigritellaYellow Nutsedge Moth
  • Elasmopalpus lignosellaLesser Cornstalk Borer
  • Euphyes vestrisDun Skipper, Dun Sedge Skipper, Sedge Witch)\
  • Globia oblongaOblong Sedge Borer Moth, Large Noagria
  • Spodoptera frugiperdaFall Armyworm Moth
Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
0BeesSoutheastern regional records
0Specialist beesPollen specialists
22BirdsRecorded genus food-resource interactions; not a state feeding claim

Recorded genus food-resource interactions; not a state feeding claim · Cyperus

  • Agelaius phoeniceusRed-winged Blackbird
  • Anas acutaNorthern Pintail
  • Anser albifronsGreater White-fronted Goose
  • Antigone canadensisSandhill Crane
  • Aythya affinisLesser Scaup
  • Aythya collarisRing-necked Duck
  • Aythya valisineriaCanvasback
  • Callipepla californicaCalifornia Quail
  • Colinus virginianusNorthern Bobwhite
  • Columbina passerinaCommon Ground Dove
Show all 22
  • Cyrtonyx montezumaeMontezuma Quail
  • Dendrocygna bicolorFulvous Whistling-Duck
  • Falcipennis canadensisSpruce Grouse
  • Gallinula galeataCommon Gallinule
  • Mareca americanaAmerican Wigeon
  • Mareca streperaGadwall
  • Meleagris gallopavoWild Turkey
  • Molothrus aterBrown-headed Cowbird
  • Pooecetes gramineusVesper Sparrow
  • Porzana carolinaSora
  • Spizella pusillaField Sparrow
  • Tympanuchus pallidicinctusLesser Prairie-Chicken
Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)

Direct food only: birds recorded eating this genus across North America. Caterpillars on host plants also feed nesting birds. NC Native Plant Society: butterfly gardening

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Cyperaceae
Flower color
Brown
Growth rate
Moderate
Growth habit
Grows in clumps
Foliage color
Green
Fruit begins
Summer
Fruit ends
Fall
Growing sources and scope
Also known as

Haspan Flat Sedge; Sheathed Flat Sedge

Conservation status

Arkansas rankS2
Global rankG5
AR statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources