L.
Identity
Unique IDELEMENT_GLOBAL.2.157907
Element CodePDAST4W1P0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusHieracium
Other Common NamesÉpervière veinée (FR) rattlesnakeweed (EN) Rattlesnake-weed (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.
Taxonomic CommentsHieracium venosum is treated by Kartesz (1999) and FNA (2006) without recognition of varieties; vars. venosum and nudicaule have sometimes been recognized (e.g., by Kartesz, 1994).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-05-15
Change Date1984-05-16
Edition Date2024-05-15
Edition AuthorsSoteropoulos (2024)
Threat ImpactUnknown
Range Extent>2,500,000 square km (greater than 1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsHieracium venosum is a wide-ranging perennial herb in open woodlands and roadsides occurring in eastern North America from Ontario, Canada and Maine west to Michigan and south to Georgia west to Mississippi in the eastern United States. Threats include development, roadside maintenance activities, and invasive species. With a large range extent and number of occurrences, abundant habitat, broad habitat preferences, and no obvious intrinsic vulnerabilities, this species is considered secure.
Range Extent CommentsHieracium venosum occurs in eastern North America from Ontario, Canada and Maine west to Michigan and south to Georgia west to Mississippi in the eastern United States (Weakley and the Southeastern Flora Team 2024). Range extent was estimated to be over 1.78 million square kilometers using herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium specimens, photo-based observations, and NatureServe Network occurrence data documented between 1993 and 2024, it is estimated that there are over 2,800 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact CommentsAlthough threats are not widely documented, this species is potentially threatened by development, roadside maintenance activities, invasive species, and other threats in some places.