Jacq.
Identity
Unique IDELEMENT_GLOBAL.2.151316
Element CodePDAST8L0G0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusSilphium
Other Common NamesPrairie-dock (EN) prairie rosinweed (EN) Silphe térébenthine (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 Date2024-03-18
Change Date1984-03-16
Edition Date2024-03-18
Edition AuthorsNordman, C. (2024).
Threat ImpactMedium - low
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsPrairie Rosinweed (Silphium terebinthinaceum) occurs in east-central North America, from southern Ontario in Canada, to Ohio, Michigan and Wisconsin, south to northern Arkansas, Mississippi, Alabama, Georgia, South Carolina and North Carolina in the United States. It is estimated that there are more than 300 and perhaps about 1800 occurrences rangewide, including on the Ozark Hill Prairie Research Natural Area, Shawnee National Forest (Illinois), Catoosa Wildlife Management Area (Tennessee), and on State Parks in Illinois, Missouri, and Mississippi, State Forests in Missouri and Ohio, and other conservation lands. Threats include the loss of natural habitat, including from land use change including residential and commercial development, conversion of natural prairie and open woodlands to dense forests, including tree canopy closure due lack of fire.
Range Extent CommentsPrairie Rosinweed (Silphium terebinthinaceum) occurs in east-central North America, from southern Ontario in Canada, to Ohio, Michigan and Wisconsin, south to northern Arkansas, Mississippi, Alabama, Georgia, South Carolina and North Carolina in the United States. Range extent was estimated to be 1,560,000 square kilometers using herbarium specimens and photo-based observations documented between 1992 and 2024 (Flora of North America Editorial Committee 2006, GBIF 2024, iNaturalist 2024, SEINet 2024, Weakley and Southeastern Flora Team 2023).
Occurrences CommentsBy applying a 1 km separation distance to herbarium records and photo-based observations documented between 1992 and 2024, it is estimated that there are more than 300 and perhaps about 1800 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact CommentsThreats include the loss of natural habitat, including from land use change including residential and commercial development, conversion of natural prairie and open woodlands to dense forests, including tree canopy closure due lack of fire (Southern Appalachian Species Viability Project 2002).