J.F. Gmel.
Identity
Unique IDELEMENT_GLOBAL.2.130243
Element CodePDCAB01010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderNymphaeales
FamilyCabombaceae
GenusBrasenia
Other Common NamesBrasénie de Schreber (FR) Purple Wen-dock (EN) watershield (EN) Water-shield (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 Date2024-08-07
Change Date1984-02-16
Edition Date2024-08-07
Edition AuthorsNordman, C. (2024).
Threat ImpactLow
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsWatershield (Brasenia schreberi) is widespread globally, it occurs in North America, across the eastern and southeastern United States, southeastern Canada the Pacific Northwest, Mexico, Central America, West Indies, and in northern South America, equatorial Africa, eastern Asia, and eastern Australia. It is estimated that there are more than 3000 occurrences, rangewide. Threats include the loss of habitat due to dams and water management, and competition from aquatic invasive exotic plants. It occurs in the United States on various National Forests, National Wildlife Refuges, State Forests, and other conservation lands.
Range Extent CommentsWatershield (Brasenia schreberi) is widespread globally, it occurs in North America, across the eastern and southeastern United States, southeastern Canada the Pacific Northwest, Mexico, Central America, West Indies, and in northern South America, equatorial Africa, eastern Asia, and eastern Australia. Range extent was estimated to be 155 million square kilometers, using herbarium specimens and photo-based observations documented between 1993 and 2024 (FNA 1997, GBIF 2024, iNaturalist 2024, POWO 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 more than 3000 occurrences rangewide (GBIF 2024, iNaturalist 2024).
Threat Impact CommentsThreats include the loss of habitat due to dams and water management, and competition from aquatic invasive exotic plants.