Cyperus haspan

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Common names: Haspan Flatsedge [1] , Shethed Flatsedge [2]

Cyperus haspan
Cyperus haspan AFP.jpg
Photo by the Atlas of Florida Plants Database
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Moncots
Order: Cyperales
Family: Cyperaceae
Genus: Cyperus
Species: C. haspan
Binomial name
Cyperus haspan
Natural range of Cyperus haspan from USDA NRCS Plants Database.

Taxonomic Notes

Synonyms: C. haspan L. var. americanus Bockler.[3]

Varieties: none.[3]


C. haspan is a perennial graminoid of the Cyperaceae family that is native to North America. [1]


C. haspan is natively distributed across the southeastern region of the United States; from Florida north to Virginia and west to Texas. It is also native to Puerto Rico and the Pacific Basin, and has been introduced to Hawaii.[1]



Common habitats for C. haspan is in tidal marshes, low fields, ditches, and waterfowl impoundments. It requires full sunlight, it has littler tolerance for shaded regions.[1][4] Cyperus haspan has been found to grow well in subtropical and tropical climates and being of the most productive plants in the regions wetlands. [5] Habitats also include wet prairies, broadleaf marshes, and wetland shrubs. They are found to germinate well in flooded environments. [6] Specimens have been collected in the following habitats; river banks, moist loamy sands, pine flatwood clearings, ponds, shallow water, hillside bogs. [7]

Associated species: Xyris sp., Fuirena sp., Rhynchospora sp., Gratiola pilosa, Eryngium integrifolium, Juncus canadensis, Thelypteris palustris, Lorinsera areolata, Smilax laurifolia, Itea virginica, Aronia arbutifolia, Lyonia ligustrina, and Viburnum nudum.[8][9]


C. haspan has been observed to flower between April and September. Seeds begin to disperse during the summer months. [1][10]

Fire ecology

Cyperus haspan has a tolerance for low intensity fires.[1]

Herbivory and toxicology

This species has been observed to be eaten by white-tailed deer.[11]

Conservation, cultivation, and restoration

C. haspan is considered to be possibly weedy or invasive by the Hawaiian Ecosystems at Risk Project.[1] Has been used in landfill restoration areas. [12]

Cultural use

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 USDA Plant Database
  2. Orzell, S. L. and E. L. Bridges (2006). "Floristic composition of the south-central Florida dry prairie landscape." Florida Ecosystem 1(3): 123-133.
  3. 3.0 3.1 Weakley, A.S. 2015. Flora of the southern and mid-atlantic states. Working Draft of 21 May 2015. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
  4. Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  5. Akinbile, C., et al. (2012). "Landfill leachate treatment using sub-surface flow constructed wetland by Cyperus haspan." Elsevier.
  6. Wetzel, P., et al. (2001). "Restoration of wetland vegetation on the Kissimmee River Floodplain: Potential role of seed banks." Wetlands 21(2): 189-198.
  7. URL: Last accessed: June 2018. Collectors: Sydney Thompson, Culver Gidden, Loran C. Anderson, T. MacClendon, K. MacClendon, R.K. Godfrey, D. B. Ward, D. Burch, R. Kral, States and counties: Florida (Wakulla, Calhoun, Charlotte, Columbia, Dade, Escambia)
  8. Morris, M. W. (1988). "Noteworthy vascular plants from Grenada County, Mississippi." SIDA, Contributions to Botany 13 (2): 177-186.
  9. (1988). "Four new records of Cyperus (Cyperaceae) in Arkansas." SIDA, Contributions to Botany 13(2): 259-261.
  10. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. Accessed: 18 MAY 2018
  11. Harlow, R. F. (1961). "Fall and winter foods of Florida white-tailed deer." The Quarterly Journal of the Florida Academy of Sciences 24(1): 19-38.
  12. Akinbile, C., et al. (2012). "Landfill leachate treatment using sub-surface flow constructed wetland by Cyperus haspan." Elsevier.