Arnica parryi

Arnica parryi
Alpine Lakes Wilderness, Washington
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Tribe: Heliantheae
Genus: Arnica
Species: A. parryi
Binomial name
Arnica parryi
Gray
Synonyms[1]
  • Arnica sonnei Greene
  • Arnica angustifolia A.Gray 1862 not Vahl 1816 nor Turcz. ex Ledeb. 1845[2]
  • Arnica eradiata (A.Gray) A.Heller

Arnica parryi is a North American species of arnica known by the common name Parry's arnica or nodding arnica.[3] It is native to western Canada (Yukon, British Columbia, Alberta) and the western United States as far south as Inyo County, California and McKinley County, New Mexico. It grows in temperate coniferous forests and alpine meadows in mountainous areas, primarily the Rocky Mountains, Cascades, and Sierra Nevada.[4]

Arnica parryi is a rhizomatous perennial herb producing a single unbranched stem to heights between 10 and 60 centimeters. There are oval-shaped leaves around the base of the stem and a few pairs of longer, narrower petioled leaves above them. The leaves may approach 20 centimeters in length on larger individuals.[5]

The inflorescence holds one to several daisylike flower heads, which nod as buds and then pull erect when the face opens. Each head has a center filled with yellow disc florets and usually several yellow ray florets around the edge. The fruit is a cylindrical achene about half a centimeter long with a bristly pappus.[5]

References

  1. ↑ The Plant List Arnica parryi A.Gray
  2. ↑ The International Plant Names Index
  3. ↑ Calflora taxon report, University of California, Arnica parryi, A. Gray, Parry's arnica, nodding arnica
  4. ↑ Biota of North America Program 2014 county distribution map
  5. 1 2 Flora of North America Vol. 21 Page 373 Parry’s arnica, nodding arnica Arnica parryi A. Gray, Amer. Naturalist. 8: 213. 1874.

External links

Media related to Arnica parryi at Wikimedia Commons


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