L.
Identity
Unique IDELEMENT_GLOBAL.2.814144
Element CodePDSAX0U2H0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilySaxifragaceae
GenusSaxifraga
Other Common NamesSaxifrage des ruisseaux (FR) weak saxifrage (EN) Weak Saxifrage (EN)
Concept ReferenceJørgensen, M. H., R. Elven, A. Tribsch, T. M. Gabrielsen, B. Stedje, and C. Brochmann. 2006. Taxonomy and evolutionary relationships in the Saxifraga rivularis complex. Systematic Botany 31(4): 702-729.
Taxonomic CommentsKartesz's (1999) concept of Saxifraga rivularis is broader than that of Jørgensen et al. (2006) and FNA (vol. 8, 2009). Kartesz (1999) includes Rocky Mountain "debilis" material in his S. rivularis, while Jørgensen et al. (2006) and FNA split S. debilis out as a distinct species. Kartesz (1999) also includes "flexuosa" material in his S. rivularis, while Jørgensen et al. (2006) place it in their S. hyperborea. In total, the S. rivularis of Jørgensen et al. (2006) and FNA has Amphi-Atlantic + Amphi-Beringian distribution, in North America occurring only along the Atlantic coast of Canada from Baffin Island south to the Gaspe´ Peninsula, into the White Mountains of New Hampshire, and along the arctic Pacific coast of Alaska from Barrow south to Seward Peninsula. In contrast, Kartesz's (1999) S. rivularis occurs in most western U.S. states and Canadian provinces.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-08-22
Change Date2008-01-22
Edition Date2024-08-22
Edition AuthorsJohnson, J. (2024)
Threat ImpactUnknown
Range Extent200,000 to >2,500,000 square km (about 80,000 to >1,000,000 square miles)
Number of Occurrences6 - 20
Rank ReasonsSaxifraga rivularis is a small perennial herb native to Arctic Canada, Alaska, New Hampshire, Greenland, Scandinavia, and Russia. Little known about threats or trends, but with a large range extent and more than 600 occurrences this species is considered secure.
Range Extent CommentsSaxifraga rivularis is native to northern North America, Greenland, the northern coast of Europe, and northeastern Russia. Range extent was estimated 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 more than 600 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact CommentsSaxifraga rivularis is unlikely to be impacted by development due to its cold, rugged habitat. Climate change is causing disruptions to arctic habitats but the impact on this species is unknown.