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Arnica mollis

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Arnica mollis
Arnica mollis in Henry M. Jackson Wilderness

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Arnica
Species:
A. mollis
Binomial name
Arnica mollis
Synonyms[1]
Synonymy
  • Arnica amplifolia Rydb.
  • Arnica arachnoidea Rydb.
  • Arnica aspera Greene
  • Arnica coloradensis Rydb.
  • Arnica confinis Greene
  • Arnica crocea Greene 1900 not L. 1753
  • Arnica crocina Greene
  • Arnica merriami Greene
  • Arnica rivularis Greene
  • Arnica scaberrima Greene
  • Arnica silvatica Greene
  • Arnica subplumosa Greene

Arnica mollis is a North American species of arnica in the sunflower family, known by the common name soft arnica,[2]: 113  or hairy arnica.[3] It is native to Canada (British Columbia, Alberta, Quebec, and all 3 Arctic territories)[4] and the United States (Alaska and the western mountains as far south as San Bernardino County, California[5] and Rio Arriba County, New Mexico. There are also isolated populations in the White Mountains of Coos County, New Hampshire.[6] The species grows in subalpine mountain habitat such as meadows and streambanks.[3]

Arnica mollis is a perennial herb producing one or more hairy, glandular, mostly naked stems 20 to 60 centimeters tall. There are 3 to 5 pairs of leaves along mainly the lower half of the stem, each oblong in shape and 4 to 20 centimeters in length.[3]

The inflorescence holds one to a few daisylike flower heads with centers of yellow disc florets and fringes of yellow ray florets. The fruit is an achene with a brownish pappus.[3]

"Mollis" means "soft", referring to the soft hairs on the leaves.[2]: 113 

References

[edit]
  1. ^ The Plant List Arnica mollis Hook.
  2. ^ a b Great Basin Wildflowers, Laird R. Blackwell, 2006, Morris Book Publishing LLC., ISBN 0-7627-3805-7
  3. ^ a b c d Flora of North America Vol. 21 Page 372 Hairy arnica Arnica mollis Hooker, Fl. Bor.-Amer. 1: 331. 1834.
  4. ^ Biota of North America Program 2014 state-level distribution map
  5. ^ Calflora taxon report, University of California, Arnica mollis Hook. Cordillerean Anica, cordilleran arnica, hairy arnica
  6. ^ Biota of North America Program 2014 county distribution map
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