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Hieracium umbellatum

L.

Umbellate Hawkweed

G5Secure Found in 4 roadless areas NatureServe Explorer →
G5SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.131633
Element CodePDAST4W1N0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusHieracium
Synonyms
Hieracium scabriusculumSchwein.Hieracium umbellatum ssp. umbellatum
Other Common Names
Épervière en ombelle (FR) Narrowleaf Hawkweed (EN) narrowleaf hawkweed (EN)
Concept Reference
Kartesz, 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 Comments
FNA (vol. 19, 2006) expands the concept of Hieracium umbellatum to include H. canadense (and all infraspecific taxa), while Kartesz (1994) here treats them as distinct.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-05-15
Change Date2002-08-09
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 Reasons
Hieracium umbellatum is a wide-ranging perennial herb in a variety of open habitats with a circumboreal distribution, including much of Asia, Europe, Canada, and the United States south to Pennsylvania, West Virginia, Indiana, Missouri, Colorado, and Oregon. Threats include development, roadside maintenance activities, succession, 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 Comments
Hieracium umbellatum has a circumboreal distribution, including much of Asia, Europe, Canada (except for Nunavut), and the United States south to Pennsylvania, West Virginia, Indiana, Missouri, Colorado, and Oregon (FNA 2006, Weakley and the Southeastern Flora Team 2024). Range extent was estimated to be over 11 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 Comments
By 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 900 occurrences rangewide (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Threat Impact Comments
Although threats are not widely documented, this species is potentially threatened by development, roadside maintenance activities, succession, invasive species, and other threats in some places.
Ecology & Habitat

Habitat

Hieracium umbellatum grows in "disturbed sites (fields, roadsides), rocky slopes, openings in forests, prairies, thickets" (FNA 2006).
Terrestrial Habitats
Forest EdgeWoodland - HardwoodWoodland - ConiferWoodland - MixedShrubland/chaparralGrassland/herbaceousOld field
Other Nations (2)
CanadaNNR
ProvinceRankNative
British ColumbiaSNRYes
Yukon TerritorySNRYes
QuebecSNRYes
Northwest TerritoriesS5Yes
OntarioSNANo
AlbertaS5Yes
Nova ScotiaSNRYes
New BrunswickSNRYes
ManitobaSNRYes
Island of NewfoundlandS4Yes
LabradorS3Yes
SaskatchewanS4Yes
Prince Edward IslandSNRYes
United StatesN5
ProvinceRankNative
New HampshireS1Yes
PennsylvaniaS1Yes
West VirginiaSUYes
MinnesotaSNRYes
OregonS2Yes
IowaSNANo
NebraskaS1Yes
MontanaS4Yes
MichiganSNRYes
WisconsinSNRYes
IndianaSNRYes
South DakotaSNRYes
WyomingSNRYes
WashingtonSNRYes
OhioS1Yes
VermontSUYes
North DakotaSNRYes
IdahoSNRYes
Threat Assessments
ThreatScopeSeverityTiming
Unknown/undetermined———

—

Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (4)
Montana (4)
AreaForestAcres
Big BaldyLewis and Clark National Forest43,135
Burnt MountainCuster National Forest10,698
Red Lodge Creek HellroaringCuster National Forest17,210
Willard Estelle #173Kootenai National Forest3,714
References (7)
  1. Flora of North America Editorial Committee (FNA). 2006a. Flora of North America north of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.
  2. Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
  3. iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
  4. Kartesz, 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.
  5. NatureServe. 2024. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  6. Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).
  7. Weakley, A.S., and Southeastern Flora Team. 2024. Flora of the southeastern United States. Edition of March 4, 2024. University of North Carolina Herbarium (NCU), North Carolina Botanical Garden, University of North Carolina, Chapel Hill. 2203 pp.