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Cyperus tetragonus Ell.
Fourangle flatsedge

Family: Cyperaceae

Group: Monocot

Substrate: Terrestrial

Habit: Herb

Perennation: Perennial

Native Range: Southern United States.

Map of select IRC data for peninsular Florida


SOUTH FLORIDA Occurrence: Present

SOUTH FLORIDA Native Status: Native

SOUTH FLORIDA Cultivated Status: Not Cultivated

Comments: For images, visit Grasses of Palm Beach and Martin Counties.

Other data on Cyperus tetragonus available from :

Cyperus tetragonus has been found in the following 20 conservation areas :
Occurrence Native Status
Big Cypress National Preserve Present Native
Black Creek Forest Present Native
Caloosahatchee Creeks Preserve Present Native
Cayo Costa State Park Present Native
Crandon Park Present Native
Deering Estate at Cutler Present Native
Everglades National Park Present Native
Fuchs Hammock Preserve Present Native
Hobe Sound Sandhill Present Native
Jonathan Dickinson State Park Present Native
Long Key Natural Area & Nature Center Present Native
National Key Deer Refuge Reported
Picayune Strand State Forest Present Native
Pine Island Ridge Natural Area Present Native
Red Reef Park, including Gumbo Limbo Nature Center Presumed Extirpated Presumed Extirpated
Rocky Point Hammock Assumed to be Present Native
Savannas Preserve State Park Present Native
Six Mile Cypress Slough Preserve Present Native
St. Lucie Inlet Preserve State Park Present Native
Twin Rivers Present Native

Cyperus tetragonus has been found in the following 8 counties :
Occurrence Native Status
Broward County Native
Collier County Native
Glades County Native
Lee County Native
Martin County Native
Miami-Dade County Native
Monroe County (Mainland) Native
Palm Beach County Native

Cyperus tetragonus has been found in the following 6 habitats :
Alluvial Forest
Coastal Strand
Maritime Hammock
Rockland Hammock
Shell Mound
Strand Swamp