Michx.
Identity
Unique IDELEMENT_GLOBAL.2.150978
Element CodePMCYP037A5
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderCyperales
FamilyCyperaceae
GenusCarex
SynonymsCarex lenticularis var. lenticularis
Other Common NamesCarex lenticulaire (FR) Shore Sedge (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.
Taxonomic CommentsThis record represents the narrow concept of Carex lenticularis following Dragon and Barrington (2009). Dragon and Barrington (2009) and Wilson et al. (2013) include C. lenticularis var. impressa (= C. kelloggii var. impressa), C. lenticularis var. limnophila (= C. kelloggii var. limnophila), and C. lenticularis var. lipocarpa (= C. kelloggii var. kelloggii) as varieties of C. kelloggii, and recognize C. lenticularis sensu stricto, C. enanderi and C. plectocarpa as distinct species. In contrast, Kartesz (1994) and FNA (vol. 23, 2002) treated C. lenticularis in a broad sense with five varieties distinguished: C. lenticularis var. dolia (including C. enanderi and C. plectocarpa), C. lenticularis var. impressa,C. lenticularis var. limnophila, C. lenticularis var. lipocarpa., and C. lenticularis var. lenticularis.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-07-12
Change Date1988-08-31
Edition Date2024-07-12
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences81 to >300
Rank ReasonsCarex lenticularis is a wide-ranging perennial graminoid in a variety of wetland habitats occurring in northern North America from Northwestern Territories south and east to Labrador and Nova Scotia in Canada (except the Nunavut) south to Minnesota east to Massachusetts in the United States. Threats include development, hydrological alteration such as abstraction of surface water or changing flood regimes from damming, rights-of-way maintenance, recreational activities (especially off-road vehicles), and invasive species. Little is known about trends, but with a large range extent and large number of occurrences, this taxon is considered secure.
Range Extent CommentsCarex lenticularis occurs in northern North America from Northwestern Territories south and east to Labrador and Nova Scotia in Canada (except the Nunavut) south to Minnesota east to Massachusetts in the United States (FNA 2002). Range extent was estimated to be over 4.5 million 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 only 43 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024). Due to different treatments of this entity, herbarium records and photo-based observations may underrepresent true abundance, though it is "a common shoreline species of ponds and streams in eastern North America" (FNA 2002).
Threat Impact CommentsAlthough threats are not widely documented, this taxon is potentially threatened by development, hydrological alteration such as abstraction of surface water or changing flood regimes from damming, rights-of-way maintenance, recreational activities (especially off-road vehicles), invasive species, and other threats in some places.