Arnica cordifolia

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Arnica cordifolia
Arnica cordifolia 4631.JPG
Wenatchee Mountains, Washington
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Arnica
Species:
A. cordifolia
Binomial name
Arnica cordifolia
Synonyms
Synonymy

Arnica cordifolia is a species of arnica in the sunflower family, known by the common name heartleaf arnica.[2] It is native to western North America from Alaska to California to New Mexico, as far east as Ontario and Michigan.[3][4] It is a plant of many habitat types, including coniferous forests, and moist mountain meadows from sea level to above 12,000 feet (3,700 m), but most commonly 4,000–11,000 feet (1,200–3,400 m).[3][5]

Description[]

This is a rhizomatous perennial herb producing one or more erect stems reaching a maximum height near half a meter. It has two to four pairs of leaves on the stem, each on a long petiole. The leaves are heart-shaped to arrowhead-shaped and finely toothed along the edges. The inflorescence bears one or more daisylike flower heads lined with white-haired phyllaries and sometimes studded with resin glands. The center of each head contains golden yellow disc florets and a fringe of bright golden ray florets approaching 3 centimeters in maximum length.[6][7][8][5]

The fruit is a hairy achene up to a centimeter long, not counting its off-white pappus. Seeds are dispersed on the wind. An individual plant can live twelve years, surviving periodic wildfire by resprouting from its long, slender rhizome afterward.[5][9]

The species could be confused with the similar Arnica latifolia, from which it can be distinguished by the leaves. The leaves of A. cordifolia are larger and heart-shaped.[10]

Uses[]

The dried leaves can be made into a poultice or tincture to treat strains and bruises.[11]

References[]

  1. ^ The International Plant Names Index
  2. ^ Calflora taxon report, University of California, Arnica cordifolia Hook. heart leaved arnica, heartleaf arnica
  3. ^ Jump up to: a b Sullivan, Steven. K. (2018). "Arnica cordifolia". Wildflower Search. Retrieved 2019-09-15.
  4. ^ Biota of North America Program 2014 state-level distribution map
  5. ^ Jump up to: a b c Flora of North America Vol. 21 Page 374 Heartleaf arnica, Arnica cordifolia Hooker, Fl. Bor.-Amer. 1: 331. 1834.
  6. ^ Klinkenberg, Brian (Editor) (2017). "Arnica cordifolia". E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. Retrieved 2019-09-15.CS1 maint: extra text: authors list (link)
  7. ^ Giblin, David (Editor) (2018). "Arnica cordifolia". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2019-09-15.CS1 maint: extra text: authors list (link)
  8. ^ "Arnica cordifolia". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2018. Retrieved 2019-09-15.
  9. ^ Ecology Fire Ecology
  10. ^ Reiner, Ralph E. (1969). Introducing the Flowering Beauty of Glacier National Park and the Majestic High Rockies. Glacier Park, Inc. p. 44.
  11. ^ Fagan, Damian (2019). Wildflowers of Oregon: A Field Guide to Over 400 Wildflowers, Trees, and Shrubs of the Coast, Cascades, and High Desert. Guilford, CT: FalconGuides. p. 101. ISBN 1-4930-3633-5. OCLC 1073035766.

External links[]


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