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longleaf arnica

Scientific Name: Arnica lonchophylla ssp. lonchophylla

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Arnica longifolia: Longleaf Arnica

Arnica longifolia, a member of the sunflower family (Asteraceae), is a North American species of arnica known by several common names.

Common Names

  • Longleaf arnica
  • Spearleaf arnica
  • Seep-spring arnica
  • Spearleaf leopardbane

Taxonomy and Nomenclature

  • Scientific Name: Arnica longifolia D.C. Eaton
  • Family: Asteraceae (Sunflower family)
  • Genus: Arnica
  • Synonyms: The text mentions Arnica lonchophylla Greene as potentially synonymous or closely related, and also lists Arnica alpina subsp. lonchophylla.

Distribution and Habitat

Arnica longifolia is native to North America, specifically the western and southwestern United States. It is found in open areas and places where snow lies late into the summer, such as along the South Loop Road downhill from the East Rim.

Morphological Characteristics

  • Erect stems, solitary or clustered, reaching 20-70 cm in height.
  • Glandular-puberulent herbage.
  • Cauline, sessile leaves, 5 to 7 pairs, entire, narrowly lanceolate, 5-15 cm long.
  • Daisy-like flower heads with deep yellow ray florets.

Interactions with Other Organisms

The plant is described as a "showy perennial species," likely attracting pollinators and other insects.

Additional Resources

  • USDA Plants Database
  • CalPhotos
  • Oregon Flora Project Atlas
  • Discover Life page about Arnica lonchophylla