Arnica longifolia

Arnica longifolia
Secure
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. longifolia
Binomial name
Arnica longifolia
Synonyms
  • Arnica caudata Rydb.
  • Arnica myriadenia Piper
  • Arnica polycephala A.Nelson

Arnica longifolia is a North American species of arnica in the sunflower family, known by the common names seep-spring arnica,: 112  longleaf arnica and spearleaf arnica. This flowering perennial is native to the forests of western Canada (British Columbia + Alberta) and the western United States (Rocky Mountains, Cascades, Coast Ranges, Sierra Nevada and other mountains of California, Oregon, Washington, Idaho, Nevada, Utah, Wyoming, Colorado, and Montana).

Description

Arnica longifolia is a rhizomatous plant forming large bunching patches of groundcover in moist, cool areas. The foliage is rough, mint-green, and sometimes sticky with glandular secretions. The stems are erect and bear daisylike flower heads with a diameter of 2 cm, with deep yellow ray florets and yellow to reddish or orange disc florets. The fruit is a reddish achene with a small pappus.

References

  1. ↑ The Plant List Arnica longifolia D.C.Eaton
  2. ↑ Great Basin Wildflowers, Laird R. Blackwell, 2006, Morris Book Publishing LLC., ISBN 0-7627-3805-7
  3. ↑ Calflora taxon report, University of California, Arnica longifolia D. Eaton longleaf arnica, seep spring arnica
  4. 1 2 Kershaw, Linda; Gould, Joyce; Johnson, Derek; Lancaster, Jane; The Alberta Native Plants Council (October 2001). Rare Vascular Plants of Alberta. The University of Alberta Press, Natural Resources Canada, Canadian Forest Service. pp. 242, 254.
  5. ↑ Biota of North America Program 2014 county distribution map
  6. ↑ Flora of North America Vol. 21 Page 374 Spearleaf arnica Arnica longifolia D. C. Eaton in S. Watson, Botany (Fortieth Parallel). 186. 1871.