Cyperus polystachyos

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Common name: manyspike flatsedge [1], coast flatsedge [2]

Cyperus polystachyos
Cyperus polystachyos 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. polystachyos
Binomial name
Cyperus polystachyos
Natural range of Cyperus polystachyos from USDA NRCS Plants Database.

Taxonomic Notes

Synonyms: C. polystachyos Rottbøll var. texensis (Torrey) Fernald; C. polystachyos var. paniculatus (Rottbøll) C.B. Clarke; C. microdontus Torrey; C. paniculatus Rottbøll

Varieties: Cyperus prolifer Lamarck


C. polystachyos is an annual/perennial graminoid of the Cyperaceae family native to North America, Hawaii, Puerto Rico, and the U.S. Virgin Islands, and both native and introduced to the Pacific Belt. [1]


C. polystachyos can be found along the southeastern coast from Texas to Maine, Hawaii, the Pacific Belt, Puerto Rico, and the U.S. Virgin Islands. [1]



C. polystachyos proliferates in low fields, ditches and marshes, as well as pantropical and warm temperate environments. [2] It is also present in sandy areas. [3]


C. polystachyos has been observed to flower between June and September. [4]

Fire ecology

C. polystachyos is not fire resistant, and has no fire tolerance. [1]

Conservation and Management

C. polystachyos is listed as endangered by the New Jersey Department of Environmental Protection and Energy Office of Natural Lands Management, and as extirpated by the Pennsylvania Department of Conservation and Natural Resources. [1]

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 USDA Plant Database
  2. 2.0 2.1 Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  3. URL: Last accessed: June 2018. Collectors: Loran C. Anderson, R. Kral, Gil Nelson, R.K. Godfrey, Gwynn W. Ramsey, R.S. Mitchell, S.W. Leonard, Leo L. Minasian Jr., J. Sincock, William P. Adams, Paul O. Schallert, Grady W. Reinert, O. Lakela, A.F. Clewell, Cecil R. Slaughter, Richard D. Houk, Chas. C. Deam, Robert J. Lemaire, Sidney McDaniel, Jimmy Meeks, T. MacClendon, K. MacClendon, Richard Carter, John B. Nelson, Leah Garris, Frank Lee, R.A. Norris, Robert L. Lazor, Robt. Blaisdell, R.F. Christensen, William R. Stimson, S.M. Tracy, L.J. Brass, James D. Ray, Jackie Patman, Allen G. Shuey, Curtis R. Jackson, Jane Brockmann, Don Blake, George R. Cooley, Richard J. Eaton, Jean J. Wooten, Wm. G. Atwater, D.L. Martin, S.T. Cooper, J.P. Gillespie, H. Kurz, P.L. Redfearn Jr. States and counties: Wakulla County Florida, Franklin County Florida, Martin County Florida, Leon County Florida, Gadsden County Florida, Madison County Florida, Taylor County Florida, Escambia County Florida, Collier County Florida, Levy County Florida, Putnam County Florida, Sumter County Florida, Brevard County Florida, Glades County Florida, Seminole County Florida, Citrus County Florida, Manatee County Florida, Hillsborough County Florida, St. Johns County Florida, Polk County Florida, Lee County Florida, Santa Rosa County Florida, Charlotte County Florida, Indian River County Florida, Bay County Florida, Marion County Florida, Nassau County Florida, Osceola County Florida, Calhoun County Florida, Jefferson County Florida, Madison County Florida, Holmes County Florida, Gulf County Florida, Pinellas County Florida, Jackson County Florida, Richland County South Carolina, Lafayette County Florida, Glynn County Georgia, Palm Beach County Florida, Broward County Florida, Highlands County Florida, Walton County Florida, De Soto County Florida, Duval County, Hernando County Florida, Monroe County Florida, Suwannee County Florida, Pasco County Florida, Dade County Florida, Hamilton County Florida, Thomas County Georgia, Camden County Georgia, Clinch County Georgia, Decatur County Georgia, Lowndes County Georgia.
  4. 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