Identity
Unique IDELEMENT_GLOBAL.2.1214609
Element CodePDSAX10040
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilySaxifragaceae
GenusTiarella
Concept ReferenceNesom, G.L. 2021. Taxonomy of Tiarella (Saxifragaceae) in the eastern USA. Phytoneuron 31: 1-61.
Taxonomic CommentsNesom (2021) splits the broad concept of Tiarella cordifolia recognized by Flora of North America Editorial Committee (2009) into five species. T. stolonifera is a stoloniferous species that is widespread from Michigan to the northeastern U.S. and adjacent Canada and south into Kentucky, Tennessee, and montane Virginia and North Carolina (Nesom 2021). Tiarella cordifolia following Nesom (2021) is a non-stoloniferous species, on the eastern seaboard from Maryland to Georgia. The other three eastern species of Tiarella recognized by Nesom (2021) are restricted to the southeastern U.S: T. austrina, T. wherryi, and T. nautila.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-03-21
Change Date2024-03-21
Edition Date2024-03-21
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsTiarella stolonifera is wide-ranging perennial herb occurring in eastern North America from Nova Scotia west to Ontario in Canada and south to the mountains of North Carolina and Tennessee in the United States. It is considered to be common throughout most of its range, with more than 4,000 occurrences in forests and woodlands. Little is known about threats or trends, but with a large range extent and large number of occurrences, this species is considered secure.
Range Extent CommentsTiarella stolonifera occurs throughout much of eastern North America from Nova Scotia west to Ontario in Canada and south to the mountains of western North Carolina and eastern Tennessee in the United States. Range extent was estimated to be 1.6 million square kilometers using herbarium specimens and photo-based observations documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, SEINet 2024, Weakley and the Southeastern Flora Team 2023).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens and photo-based observations documented between 1993 and 2024, it is estimated that there are over 4,000 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact CommentsAlthough threats are not widely documented, Tiarella stolonifera is potentially threatened by development, invasive species, and other threats in some places. However, their overall impact is likely negligible given the species' broad range, large number of occurrences, and no obvious intrinsic vulnerabilities.