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Petasites frigidus (L. ) Fr.
ARCTIC SWEET COLTSFOOT
Life   Plantae   Dicotyledoneae   Asteraceae   Petasites

Petasites frigidus
© Copyright Mel Harte 2010 · 3
Petasites frigidus

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Petasites frigidus
© Copyright Mel Harte 2010 · 3
Petasites frigidus
Petasites frigidus
© Copyright Mel Harte 2010 · 3
Petasites frigidus

Petasites frigidus
© Copyright Mel Harte 2010 · 3
Petasites frigidus
Petasites frigidus
© Copyright Mel Harte 2010 · 3
Petasites frigidus

Petasites frigidus, palmatus
© Les Mehrhoff, 2008-2010 · 1
Petasites frigidus, palmatus

Associates · map
FamilyScientific name @ source (records)
Apidae  Bombus borealis @ AMNH_BEE (1)

Bombus ternarius @ AMNH_BEE (1)
Coleosporiaceae  Coleosporium petasitis @ BPI (1)
Erysiphaceae  Erysiphe cichoracearum @ BPI (1)
Pucciniaceae  Puccinia conglomerata @ BPI (5)

Puccinia petasitis @ BPI (3)

Puccinia poarum @ BPI (1)
Synchytriaceae  Synchytrium aureum @ BPI (3)
Uropyxidaceae  Aecidium petasitidis @ BPI (1)

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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=PEFR5 ---> https://plants.usda.gov/java/profile?symbol=PEFR5
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Following modified from Flora of North America
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FNA Vol. 20 Page 637 , 639 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 20 | Asteraceae | Petasites

1. Petasites frigidus (Linnaeus) Fries, Summa Veg. Scand. 182. 1845.

Arctic sweet coltsfoot, Arctic butterbur

Tussilago frigida Linnaeus, Sp. Pl. 2: 865. 1753; Nardosmia frigida (Linnaeus) Hooker

Plants 10—60(—120) cm. Rhizomes much branched, creeping, often forming long-lived, spreading clones. Basal leaves: blades mostly reniform, orbiculate-cordate, cordate, ovate, triangular, or sagittate, margins subentire to coarsely dentate to wavy, or shallowly to deeply pinnipalmately or palmately lobed, lobes obtuse to acute, often again lobed or toothed, abaxial faces densely white-tomentose to lanate, adaxial faces densely lanate or floccose, glabrescent, or glabrous. Staminate heads 2—53 (ray florets: 0 or 1—70, styliferous and sterile, corolla laminae 1.1—12 mm; disc florets 11—78, functionally staminate; style branches 0—2.3 mm, papillate or hairy). Pistillate heads 5—60 (ray florets 30—139, pistillate and fertile, corolla laminae 0.6—6.3 mm; disc florets 1—12, functionally staminate, style branches 0—2.3 mm, papillate or hairy). Phyllaries: staminate 3.6—12.8 × 1—4.4 mm, pistillate 1—9.5 × 0.7—3.3 mm, margins entire or serrate. Cypselae 1.7—3.5 mm; pappi (longest, pistillate heads) 7—17.3 mm.

Varieties 4 (4 in the flora): North America, Eurasia.

Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus+var.+palmatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus+var.+palmatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus+var.+sagitatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Petasites+frigidus+var.+sagitatus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant
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Updated: 2017-12-18 15:45:09 gmt
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