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Four-angle Flatsedge

Cyperus tetragonus

Found in maritime forests and dunes, edges of brackish marshes. Weakley, Flora of the Southeastern United States (2025), Florida edition What its natural habitat tells you

44
Good

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

Profile 88%

Height
Up to about 32 inches
Light
Partial shade, Full sun
Soil moisture
Dry to standing water
Will it fit your yard?

At a glance

Life cycle
Perennial
Bloom
July to September

Not yet recorded · Spread · Leaves

Recorded in 45 Florida 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

Maritime forests and thickets

Salt-pruned forests and shrub thickets behind coastal dunes.

Coastal dunes and beaches

Open sand of beaches, dunes and the hollows between them.

Salt and brackish marshes

Coastal marshes flooded by salty or brackish tides.

All habitats

Also found with this plant

Wildlife whose habitat models include habitats this plant grows in, in Florida. Shared habitat, not food. 78 animals.

All wildlife of Florida

Ecological relationships

Who uses this plant?

What these records mean

11CaterpillarsGenus host records with ranges including FL

Genus host records with ranges including FL · Cyperus

  • Argyrotaenia ivanaIvana Leafroller Moth
  • Bactra verutanaJavelin Moth
  • Diploschizia impigritellaYellow Nutsedge Moth
  • Elasmopalpus lignosellaLesser Cornstalk Borer
  • Euphyes pilatkaSawgrass Skipper, Palatka Skipper, Coastal Sedge Skipper, Keys Sawgrass Skipper[for subspecies Euphyes pilatka klotsi]
  • Euphyes vestrisDun Skipper, Dun Sedge Skipper, Sedge Witch)\
  • Globia oblongaOblong Sedge Borer Moth, Large Noagria
  • Spodoptera frugiperdaFall Armyworm Moth
  • Bactra cultellana
  • Bactra philocherda
Show all 11
  • Cosmopterix attenuatella
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
Green or brown

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
Also known as

Four angle Flatsedge

Conservation status

Florida rankS4
Global rankG4
FL statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources