Fern.
Identity
Unique IDELEMENT_GLOBAL.2.140364
Element CodePMCYP0Q0M0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderCyperales
FamilyCyperaceae
GenusScirpus
Other Common NamesScirpe étalé (FR) woodland bulrush (EN)
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 Date2024-03-29
Change Date1988-02-11
Edition Date2024-03-29
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 - 300
Rank ReasonsScirpus expansus is a perennial graminoid in bogs, fens, marshes, wet meadows, and streambeds in eastern North America from Nova Scotia and Ontario in Canada south into the United States from Maine west to Michigan south to Georgia and Alabama. It faces threats from succession, alteration of hydrology, invasive species, water pollution, deer herbivory, recreation, flooding and storm surge, development, and other threats in some places. Little is known about trends, but with a large range extent and between 100 and 200 occurrences, this species is considered secure.
Range Extent CommentsScirpus expansus occurs in eastern North America from Nova Scotia (possibly extirpated) and Ontario in Canada and south into the United States from Maine west to Michigan south to Georgia and Alabama. Range extent was estimated to be over 950,000 square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024, it is estimated that there are approximately 100 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact CommentsAlthough threats are not widely documented, Scirpus expansus is threatened by succession, alteration of hydrology, invasive species, water pollution, deer herbivory, recreation, flooding and storm surge, development, and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species (NatureServe 2024).