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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 retroflexus (Oneflower flatsedge)
San Antonio River Authority

Cyperus retroflexus

Cyperus retroflexus Buckley

Oneflower Flatsedge

Cyperaceae (Sedge Family)

Synonym(s): Cyperus uniflorus

USDA Symbol: CYRE14

USDA Native Status: L48 (N)


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Grass/Grass-like
Root Type: Fibrous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Linear
Leaf Venation: Parallel
Inflorescence: Spike
Fruit Type: Achene
Size Notes: Up to about 32 inches tall.
Fruit: Tan to red brown

Bloom Information

Bloom Color: White , Green , Brown
Bloom Time: Jul , Aug , Sep
Bloom Notes: Perianth absent. Bloom time denotes fruiting period for Cyperus spp.


USA: AL , AR , AZ , LA , MO , MS , NM , OK , TX

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Pineywoods Native Plant Center - Nacogdoches, TX

Herbarium Specimen(s)

NPSOT 0430 Collected Jun 12, 1993 in Bexar County by Mike Fox

1 specimen(s) available in the Digital Herbarium

Wildflower Center Seed Bank

LBJWC-MLE-37 Collected 2010-09-30 in Nacogdoches County by Lady Bird Johnson Wildflower Center

1 collection(s) available in the Wildflower Center Seed Bank

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


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

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