Oakes ex Rydb.
Identity
Unique IDELEMENT_GLOBAL.2.159641
Element CodePDROS1B1N0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyRosaceae
GenusPotentilla
Other Common Namesdwarf mountain cinquefoil (EN) Dwarf Mountain Cinquefoil (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 Date2023-03-06
Change Date1983-08-18
Edition Date2023-03-06
Edition AuthorsOstlie, W. (MRO, 1990), rev. L. Morse (2000), rev. A. Tomaino (2008), rev. Eberly (2023)
Threat ImpactUnknown
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 5
Rank ReasonsPotentilla robbinsiana is a tiny, charismatic, perennial herb endemic to the White Mountains of New Hampshire in the northeastern U.S.A. It is a glacial relict and restricted to alpine areas. This species' habitat is extremely limited and there are only two naturally occurring populations, one of which has less than five plants. Two transplanted populations appear to be viable. Impacts from trampling have affected this species substantially in the past but trail rerouting has reduced this threat. Monitoring of this species should continue to detect changes in threats, especially climate change, and to continue to document population trends. This species recovery at present has been successful due to the contributions of many organizations that have raised the profile of the species and collaborated to mitigate threats and enhance populations.
Range Extent CommentsPotentilla robbinsiana occurs in the northeastern United States, where it is endemic to the White Mountains of New Hampshire. It is a glacial relict restricted to alpine areas, above the treeline.
Occurrences CommentsThere are two naturally occurring populations, Monroe Flats and Franconia Ridge. In addition, there are two transplant populations within the species native range: Camel Patch, first established in the 1980's, and new Franconia Ridge, first established in 1988 at what is likely a historical site (USFWS 2002).
Threat Impact CommentsThis species was delisted largely because of the collective efforts to protect it from recreation, educate the public, and fold in ex situ conservation efforts to boost natural sites and to establish introduced occurrences for security (AMC Staff 2021). Over the decades this species declined due to trampling by hikers and over collection. construction of a stone wall in the habitat area may be limiting further spread of the population. Crawford Pass was rerouted to protect the largest population from trampling. Acid rain is a potential threat, but its effect on the species are still unknown. Climate change may be the greatest threat and ongoing monitoring will be necessary to detect impacts to this species.