Identity
Unique IDELEMENT_GLOBAL.2.156283
Element CodePMPOT03020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderNajadales
FamilyPotamogetonaceae
GenusPotamogeton
Other Common Nameslargeleaf pondweed (EN) Potamot à grandes feuilles (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 Date2024-09-27
Change Date1984-03-16
Edition Date2024-09-27
Edition AuthorsN. Ventrella (2024)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsPotamogeton amplifolius is a perennial aquatic forb occurring throughout much of North America from British Columbia east to Newfoundland, Canada south to Georgia, and northwest to Colorado, Oregon, and California in the United States. There are over 800 occurrences of this taxon, which are potentially threatened by land-use conversion, habitat fragmentation, water diversion and alteration of hydrology, erosion, pollution, recreational activities, invasive species, climate change, and other threats in some places. Little is known about threats or trends, but with a large range extent, high number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, Potamogeton amplifolius is considered secure.
Range Extent CommentsPotamogeton amplifolius occurs throughout much of North America, from British Columbia east to Newfoundland, Canada south to Georgia, and northwest to Colorado, Oregon, and California in the United States (FNA 2000). This species is also native to Mexico in the state of Michoacán (POWO 2024). Range extent was estimated to be over 12 million square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected 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 more than 800 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact CommentsPotamogeton amplifolius is somewhat threatened by land-use conversion and habitat fragmentation (Southern Appalachian Species Viability Project 2002). Additional threats are not widely documented, but likely include water diversion, alteration of hydrology, erosion, pollution and eutrophication, recreational activities, invasive species, climate change, and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species.