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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Cyperus schweinitzii

Cyperus schweinitzii Torr.

Schweinitz's Flatsedge

Cyperaceae (Sedge Family)

Synonym(s): Cyperus schweinitzii var. uberior, Cyperus ×mesochoreus, Mariscus schweinitzii

USDA Symbol: CYSC3

USDA Native Status: L48 (N), CAN (N)

Unusual dry-land Cyperus. Produces a tall and seemingly branched seed head resembling spines of an open umbrella.


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Plant Characteristics

Duration: Perennial
Habit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Linear
Leaf Venation: Parallel
Inflorescence: Spikelet
Fruit Type: Achene
Size Notes: Up to about 3 feet tall.
Fruit: Dark brown

Bloom Information

Bloom Color: White , Green
Bloom Time: Apr , May , Jun , Jul
Bloom Notes: Perianth absent. Bloom time denotes fruiting period for Cyperus spp.


USA: AR , AZ , CO , IA , ID , IL , IN , KS , KY , MA , MI , MN , MO , MT , ND , NE , NJ , NM , NY , OH , OK , OR , PA , SD , TX , UT , WA , WI , WY
Canada: ON
Native Habitat: Prairie/Meadow/Field,Lakeshores

Growing Conditions

Light Requirement: Sun
Soil Moisture: Dry
Soil Description: Sand

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Cyperus schweinitzii in USDA Plants
FNA: Find Cyperus schweinitzii in the Flora of North America (if available)
Google: Search Google for Cyperus schweinitzii


Record Modified: 2023-02-03
Research By: TWC Staff

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