Cyperus pseudovegetus

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Common Names: Marsh Flatsedge; Green Flatsedge [1]

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

Taxonomic Notes

Synonyms: C. virens Michaux.[2]

Varieties: none.[2]


C. pseudovegetus is a perennial praminoid of the Cyperaceae family native to North America. [1]


C. pseudovegetus is native to the eastern United States, including New Jersey and Massachusetts, west to southern Illinois and south Missouri, south to Florida, and west to Texas and Oklahoma.[3]



Common habitats for the C. pseudovegetus include marshes, ditches, and other depressions with moist soils, for instance samples have been taken from pine flatwoods, edges of ponds and rivers, and other depressions that consist of moist soils.[3][4] In this habitat, a study found C. pseudovegetus to colonize an old-field succession site beginning at 5 years since agricultural abandonment, and persisting through 15 years since abandonment.[5] It is also listed as a facultative wetland species, where it commonly occurs in wetlands, but can occasionally be found in non-wetland habitats.[1] This species commonly prefers wet, open habitats with full sun.[6]

Associated species: Taxodium sp., Quercus sp., Nyssa sp., Magnolia sp., Acer rubrum, Liquidambar styraciflua, Cyperus strigosus, C. surinamensis, Carex sp., Juncus sp., Hyptis alata, Rudbeckia mohrii, and Eleocharis obtusa.[4]


It is known to flower from July to October.[3] This flowering period is also when fruit is developed.[6]

Herbivory and toxicology

C. pseudovegetus attracts birds, and is highly deer resistant.[6]

Conservation, cultivation, and restoration

It is listed as rare by the Indiana Department of Natural Resources, and as endangered by the New Jersey Department of Environmental Protection and Energy.[1]

Cultural use

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 USDA Plant Database Cite error: Invalid <ref> tag; name "USDA" defined multiple times with different content
  2. 2.0 2.1 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.
  3. 3.0 3.1 3.2 Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
  4. 4.0 4.1 URL: Last accessed: June 2018. Collectors: Loran C. Anderson, K. Craddock Burks, R. K. Godfrey, R. Kral, P. REdfearn, Sydney Thompson, Culver Gidden, R. Thorne, R. Davidson, R. Norris, Cecil Slaughter, William Platt, Richar Carter, SHaron Carter, W. George. States and counties: Florida (Wakulla, Liberty, Nassau, Franklin, Washington, Leon, Jefferson, Gulf, Gadsden, Holmes, Calhoun, Taylor) Georgia (Thomas, Upson, McIntosh, Lowndes, Clinch, Berrian)
  5. Battaglia, L. L., et al. (2002). "Sixteen years of old-field succession and reestablishment of a bottomland hardwood forest in the lower Mississippi alluvial valley." Wetlands 22(1): 1-17.
  6. 6.0 6.1 6.2 [[1]] Lady Bird Johnson Wildflower Center. Accessed: April 25, 2019