Hieracium caespitosum - Dumort.
Meadow Hawkweed
Other Common Names: meadow hawkweed
Synonym(s): Pilosella caespitosa (Dumort.) P.D. Sell. & C. West
Taxonomic Status: Accepted
Related ITIS Name(s): Hieracium caespitosum Dumort. (TSN 503009)
French Common Names: épervière des prés
Unique Identifier: ELEMENT_GLOBAL.2.146060
Element Code: PDAST4W0B0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Hieracium
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Concept Reference
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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.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Hieracium caespitosum
Conservation Status
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NatureServe Status

Global Status: GNR
Global Status Last Changed: 22Mar1994
Rounded Global Status: GNR - Not Yet Ranked
Nation: United States
National Status: NNA
Nation: Canada
National Status: NNA (15Mar2012)

U.S. & Canada State/Province Status
United States Connecticut (SNA), Delaware (SNA), District of Columbia (SNA), Georgia (SNR), Idaho (SNA), Illinois (SNA), Indiana (SNA), Kentucky (SNA), Maine (SNA), Maryland (SNA), Massachusetts (SNR), Michigan (SNA), Minnesota (SNA), Montana (SNA), New Hampshire (SNA), New Jersey (SNA), New York (SNA), North Carolina (SNA), Ohio (SNA), Pennsylvania (SNA), Rhode Island (SNA), South Carolina (SNA), Tennessee (SNA), Vermont (SNA), Virginia (SNA), Washington (SNA), West Virginia (SNA), Wisconsin (SNA), Wyoming (SNA)
Canada Alberta (SNA), British Columbia (SNA), Manitoba (SNA), New Brunswick (SNA), Newfoundland Island (SNA), Nova Scotia (SNA), Ontario (SNA), Prince Edward Island (SNA), Quebec (SNA)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
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U.S. States and Canadian Provinces
Color legend for Distribution Map
NOTE: The distribution shown may be incomplete, particularly for some rapidly spreading exotic species.

U.S. & Canada State/Province Distribution
United States CTexotic, DCexotic, DEexotic, GA, IDexotic, ILexotic, INexotic, KYexotic, MA, MDexotic, MEexotic, MIexotic, MNexotic, MTexotic, NCexotic, NHexotic, NJexotic, NYexotic, OHexotic, PAexotic, RIexotic, SCexotic, TNexotic, VAexotic, VTexotic, WAexotic, WIexotic, WVexotic, WYexotic
Canada ABexotic, BCexotic, MBexotic, NBexotic, NFexotic, NSexotic, ONexotic, PEexotic, QCexotic

Range Map
No map available.

Ecology & Life History Not yet assessed
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Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank)
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Disclaimer: While I-Rank information is available over NatureServe Explorer, NatureServe is not actively developing or maintaining these data. Species with I-RANKs do not represent a random sample of species exotic in the United States; available assessments may be biased toward those species with higher-than-average impact.

I-Rank: Medium/Insignificant
Rounded I-Rank: Unknown
I-Rank Reasons Summary: Many Hieracium spp. are introduced in the U.S. where they can be aggressive and locally dominant. Despite the primary method of reproduction being clonal through production of stolons, some Hieracium spp. are also known to have a viable seed bank. Hieracium caespitosum is primarily known from secondary native species habitats, like roadsides and pastures.
Subrank I - Ecological Impact: Medium/Insignificant
Subrank II - Current Distribution/Abundance: High/Low
Subrank III - Trend in Distribution/Abundance: Medium/Insignificant
Subrank IV - Management Difficulty: Unknown
I-Rank Review Date: 19May2004
Evaluator: Fellows, M.
Native anywhere in the U.S?
Native Range: Native to Europe (GRIN 2001).

Download "An Invasive Species Assessment Protocol: Evaluating Non-Native Plants for their Impact on Biodiversity". (PDF, 1.03MB)
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Screening Questions

S-1. Established outside cultivation as a non-native? YES
Comments: (Kartesz 1999).

S-2. Present in conservation areas or other native species habitat? Yes
Comments: May be found in dry woods, otherwise in highly disturbed habitats (Gleason 1952).

Subrank I - Ecological Impact: Medium/Insignificant

1. Impact on Ecosystem Processes and System-wide Parameters:Low significance/Insignificant
Comments: There are no reported ecosystem effects, therefore a low or insignificant rank is inferred.

2. Impact on Ecological Community Structure:Unknown

3. Impact on Ecological Community Composition:Unknown

4. Impact on Individual Native Plant or Animal Species:Unknown

5. Conservation Significance of the Communities and Native Species Threatened:Low significance/Insignificant
Comments: Found in fields, pastures and along roadsides; occassionaly in dry woods (Gleason 1952).

Subrank II. Current Distribution and Abundance: High/Low

6. Current Range Size in Nation:Moderate significance
Comments: Eastern third of U.S. north of FL, and WA, ID and MT (Kartesz 1999).

7. Proportion of Current Range Where the Species is Negatively Impacting Biodiversity:Unknown
Comments: Listed noxious in NC, WA and ID (Kartesz 1999). May become the dominant species along roadsides (Roland 1983).

8. Proportion of Nation's Biogeographic Units Invaded:Moderate significance
Comments: Potentially in c. 29 ecoregions - inferred from Kartesz (1999) and TNC (2001).

9. Diversity of Habitats or Ecological Systems Invaded in Nation:Low significance
Comments: Found in fields, pastures and along roadsides; occassionaly in dry woods (Gleason 1952). Also found in meadows and forest edges, but still in dry areas (Hough 1983).

Subrank III. Trend in Distribution and Abundance: Medium/Insignificant

10. Current Trend in Total Range within Nation:Medium/Low significance
Comments: Has been characterized as "very aggressive" (Fernald 1950), but may be limited to disturbed habitats (Gleason 1952).

11. Proportion of Potential Range Currently Occupied:Unknown

12. Long-distance Dispersal Potential within Nation:Unknown

13. Local Range Expansion or Change in Abundance:High/Low significance
Comments: Has been characterized as "very aggressive" (Fernald 1950).

14. Inherent Ability to Invade Conservation Areas and Other Native Species Habitats:Low significance/Insignificant
Comments: May be found in dry woods, otherwise in highly disturbed habitats (Gleason 1952).

15. Similar Habitats Invaded Elsewhere:Low significance
Comments: Southeastern Canada to ON, and possibly BC (Kartesz 1999). Listed from similar habitats in Canada (Roland 1983).

16. Reproductive Characteristics:Low significance
Comments: Forms stolons and rhizomes (Gleason 1952).

Subrank IV. General Management Difficulty: Unknown

17. General Management Difficulty:Unknown

18. Minimum Time Commitment:Unknown

19. Impacts of Management on Native Species:Unknown

20. Accessibility of Invaded Areas:Unknown
Authors/Contributors
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Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
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  • Bräutigam, S. and W. Greuter. 2007. A new treatment of Pilosella for the Euro-Mediterranean flora [Notulae ad floram euro-mediterraneam pertinentes 24]. Willdenowia 37: 123-137. [http://www.bgbm.org/willdenowia/w-pdf/wi37-1Braeutigam+Greuter.pdf]

  • Fernald, M. L. 1950. Gray's manual of botany. 8th edition. Corrected printing (1970). D. Van Nostrand Company, New York. 1632 pp.

  • Gleason, H.A. 1952. The new Britton and Brown illustrated flora of the northeastern United States and adjacent Canada. 3 volumes. Hafner Press, New York. 1732 pp.

  • Hough, M.Y. 1983. New Jersey wild plants. Harmony Press, Harmony, NJ. 414 pp.

  • 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.

  • Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.

  • Meades, S.J. & Hay, S.G; Brouillet, L. 2000. Annotated Checklist of Vascular Plants of Newfoundland and Labrador. Memorial University Botanical Gardens, St John's NF. 237pp.

  • Roland, A.E., and E.C. Smith. 1983. The flora of Nova Scotia: Volumes 1 and 2. Nova Scotia Museum, Halifax, NS, Canada. 746 pp.

  • The Nature Conservancy. 2001. Map: TNC Ecoregions of the United States. Modification of Bailey Ecoregions. Online . Accessed May 2003.

  • USDA, ARS, National Genetic Resources Program. 2001. Germplasm Resources Information Network - (GRIN). [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland.URL: http://www.ars-grin.gov/var/apache/cgi-bin/npgs/html/taxon.pl?6438. (Accessed 2004)

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