L.
Identity
Unique IDELEMENT_GLOBAL.2.147983
Element CodePMCYP064B0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderCyperales
FamilyCyperaceae
GenusCyperus
SynonymsCyperus inflexusMuhl.
Other Common NamesAwned Cyperus (EN) Bearded Flatsedge (EN) bearded flatsedge (EN) Souchet courbé (FR)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2025-07-24
Change Date1993-08-10
Edition Date2025-07-24
Edition AuthorsStoner, N.; Rev. C. Annable (1993), rev. Johnson, J. (2025)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsCyperus squarrosus is an annual graminoid found in damp habitats across much of the world including most of North America south of boreal Canada. With a broad global range, thousands of occurrences, and a tolerance for human disturbance, this species is considered secure.
Range Extent CommentsCyperus squarrosus is found throughout much of the world in North America from southern Canada to Mexico, continuing south through the Caribbean, Central America, and South America. It is also native to Africa South of the Sahara Desert, South Asia, and Australia, and exotic in southern Europe (FNA 2002, POWO 2025). Range extent was estimated using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1994 and 2025 (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025, it is estimated that there are thousands of occurrences rangewide (GBIF 2025, iNaturalist 2025, NatureServe 2025, RARECAT 2025, SEINet 2025).
Threat Impact CommentsAlthough threats are not widely documented, Cyperus squarrosus is potentially threatened by development, road maintenance, invasive species, and other threats in some places. However, their overall impact is likely negligible given the species' broad range, large number of occurrences, tolerance of disturbance, and affinity for typically abundant habitats.