Petasites frigidus var. frigidus
Arctic Butter-bur
Other English Common Names: Arctic Sweet-colt's-foot, Northern Sweet-colt's-foot
Other Common Names: arctic sweet coltsfoot
Synonym(s): Petasites frigidus ssp. frigidus
Taxonomic Status: Accepted
Related ITIS Name(s): Petasites frigidus var. frigidus (L.) Fr. (TSN 529538)
French Common Names: pétasite des régions froides
Unique Identifier: ELEMENT_GLOBAL.2.159266
Element Code: PDAST71014
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Petasites
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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: Petasites frigidus var. frigidus
Taxonomic Comments: Kartesz (1999) includes P. frigidus var. nivalis as a synonym; it was considered distinct in Kartesz (1994) and by Cronquist (1955) for the Pacific Northwest, and is recognized by Cody (1996) for the Yukon.
Conservation Status
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NatureServe Status

Global Status: G5T5
Global Status Last Reviewed: 16May2016
Global Status Last Changed: 19Sep2000
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: T5 - Secure
Reasons: Petasites frigidus var. frigidus (including P. frigidus var. nivalis) ranges in the far north from Eurasia to western North America, reaching the Pacific Northwest and Montana.
Nation: United States
National Status: N4N5
Nation: Canada
National Status: N5 (18Mar2012)

U.S. & Canada State/Province Status
United States Alaska (SNR), Montana (S1), Washington (SNR)
Canada Alberta (S3), British Columbia (S4), Northwest Territories (SNR), Nunavut (SNR), Yukon Territory (S5)

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

U.S. & Canada State/Province Distribution
United States AK, MT, WA
Canada AB, BC, NT, NU, YT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
MT Flathead (30029), Glacier (30035)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
09 St. Marys (09040001)+
17 North Fork Flathead (17010206)+, South Fork Flathead (17010209)+, Stillwater (17010210)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Palmate-leaved Coltsfoot is a rhizomatous, perennial herb with erect stems that are 1-3 dm high and clothed in alternate, overlapping, brownish parallel-veined bracts that are 25-60 mm long. Leaves arise from the ground separately and later than stems. Blades are up to 2 dm wide and are spade-shaped with lobed margins and long petioles. Leaves are glabrous above but covered with long white hairs beneath. Many stalked flower heads are borne in a small umbrella-shaped inflorescence at the top of the stem. Each head is 5-9 mm high and has a single series of involucral bracts surrounding the white tubular flowers. Some heads have flowers with fertile ovaries and inconspicuous rays but without stamens. Other heads have flowers without rays but with fertile stamens and sterile ovaries. The achenes are topped by numerous unbranched, white bristles, which form a pappus.
Diagnostic Characteristics: The more common P. SAGITTATUS has leaves that are merely toothed on the margins.
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) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 19Sep2000
NatureServe Conservation Status Factors Author: MacBryde, Bruce
Element Ecology & Life History Edition Date: 09Nov1997
Element Ecology & Life History Author(s): KAJ

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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  • Cody, W.J. 1996. The flora of the Yukon Territory. National Research Council of Canada Research Press, Ottawa, Canada. 643 pp.

  • Cronquist, A. 1955. Compositae. In C.L. Hitchcock, A. Cronquist, M. Ownbey, and J.W. Thompson (eds.). Vascular plants of the Pacific Northwest. Part 5. Univ. Washington Press, Seattle. 343 pp.

  • Flora of North America Editorial Committee. 2006b. Flora of North America North of Mexico. Vol. 20. Magnoliophyta: Asteridae, part 7: Asteraceae, part 2. Oxford Univ. Press, New York. xxii + 666 pp.

  • Hulten, E. 1968. Flora of Alaska and neighboring territories. Stanford Univ. Press, Palo Alto, CA. 1008 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.

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