Raf.
Identity
Unique IDELEMENT_GLOBAL.2.148655
Element CodePMALI01040
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassMonocotyledoneae
OrderAlismatales
FamilyAlismataceae
GenusAlisma
SynonymsAlisma plantago-aquatica var. parviflorum(Pursh) Torr.
Other Common NamesAlisma subcordé (FR) American water plantain (EN) American Water-plantain (EN) Southern Water-plantain (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 Date2024-08-09
Change Date2015-07-02
Edition Date2024-08-08
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 ReasonsAlisma subcordatum is a perennial herb occurring in shallow ponds, stream margins, marshes, and ditches of North America, from Ontario east to New Brunswick, Canada south to Maine and Florida, west to Texas and Colorado, and north to North Dakota, and possibly Arizona and New Mexico in the United States. There are over 700 estimated occurrences of this taxon range-wide, which are potentially threatened by development, water diversion, alteration of hydrology, erosion, succession, recreational activities, and invasive species. Little is known about threats or trends, but with a large range extent and high number of occurrences, this species is considered secure.
Range Extent CommentsAlisma subcordatum occurs in North America from Ontario east to New Brunswick, Canada south to Maine and Florida, west to Texas and Colorado, and north to North Dakota in the United States (FNA 2000). There are also unconfirmed reports from herbarium specimens in New Mexico and Arizona (SEINet 2024). Range extent was estimated to be over 4 million square kilometers using herbarium specimens and photo-based observations documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, SEINet 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium records and photo-based observations documented between 1993 and 2024, there are estimated to be over 700 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact CommentsAlthough threats are not widely documented, Alisma subcordatum is potentially threatened by development, water diversion, alteration of hydrology, erosion, succession, recreational activities, invasive species, and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species.