L.
Identity
Unique IDELEMENT_GLOBAL.2.139458
Element CodePDTIL02010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderMalvales
FamilyMalvaceae
GenusTilia
Other Common NamesAmerican basswood (EN) Tilleul d'Amérique (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 Date2024-09-24
Change Date1984-09-06
Edition Date2024-09-24
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsTilia americana is a wide-ranging tree in a variety of forested habitats occurring in eastern and central North America from New Brunswick west to Manitoba, Canada south to Florida and Texas in the United States, and Mexico. Threats potentially include development, logging, and invasive species. Little is known about trends, but with a large range extent and large number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, this species is considered secure.
Range Extent CommentsTilia americana occurs in eastern and central North America from New Brunswick west to Manitoba, Canada south to Florida and Texas in the United States, and Mexico (Weakley and the Southeastern Flora Team 2024). Range extent was estimated to be approximately over 8 million square kilometers 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 specimens and photo-based observations documented between 1993 and 2024, it is estimated that there are thousands of occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024). However, this taxon is commonly cultivated, and iNatualist observations (>38,000, mostly identified at the species-level) were not evaluated for evidence of cultivation (iNaturalist 2024).
Threat Impact CommentsAlthough threats are not widely documented, this species is potentially threatened by development, logging, 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.