Raf.
Identity
Unique IDELEMENT_GLOBAL.2.137477
Element CodePDONA060G0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderMyrtales
FamilyOnagraceae
GenusEpilobium
SynonymsEpilobium palustre var. gracile(Farw.) Dorn
Other Common Namesbog willowherb (EN) Bog Willowherb (EN) Épilobe leptophylle (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 Date2025-01-15
Change Date1984-04-24
Edition Date2025-01-15
Edition AuthorsN. Ventrella (2025)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsEpilobium leptophyllum is a perennial forb occurring in bogs, fens, thickets, seepages, marshes, and damp pastures from Newfoundland and the Northwest Territories west to British Columbia and Alaska, south to North Carolina, Tennessee, Kansas, Texas, New Mexico and California in the United States and Canada. There are over 400 estimated occurrences rangewide, which are threatened by drainage of wetland habitats and alteration of hydrology. Little is known about threats and trends, but with a large range extent, high number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, Epilobium leptophyllum is considered secure.
Range Extent CommentsEpilobium leptophyllum occurs in North America from Newfoundland and the Northwest Territories west to British Columbia and Alaska, south to North Carolina, Tennessee, Kansas, Texas, New Mexico and California in the United States and Canada (FNA 2021, Weakley and the Southeastern Flora Team 2024). Range extent was estimated using herbarium specimens, photo-based observations, and NatureServe Network occurrence data collected between 1994 and 2025 (GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1994 and 2025, it is estimated that there are more than 400 occurrences rangewide (GBIF 2025, iNaturalist 2025, NatureServe 2025, SEINet 2025).
Threat Impact CommentsEpilobium leptophyllum is at low risk from drainage of wetlands (Southern Appalachian Species Viability Project 2002). Additional potential threats include development, erosion, succession, recreational activities, invasive species, drought, and other threats in some places, though there is insufficient data, including anecdotal accounts, to understand scope and severity of threats for this species.