Arnica lanceolata

Arnica lanceolata is a North American species of arnica in the sunflower family, known by the common name clasping arnica[2] or lanceleaf arnica.[3] It has a disjunct (discontinuous) distribution in western North America and northeastern North America.[4][5]

Arnica lanceolata
A. lanceolata subsp. prima
California
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Heliantheae
Genus:
Arnica
Species:
A. lanceolata
Binomial name
Arnica lanceolata
Synonyms[1][2]
  • Arnica mollis var. petiolaris Fernald
  • Arnica petiolaris (Fernald) Rydb.
  • Arnica amplexicaulis Nutt., syn of subsp. prima
  • Arnica amplexifolia Rydb., syn of subsp. prima

Arnica lanceolata is a perennial herb usually growing from a small rhizome and producing one or more hairy, glandular stems. The stems are lined with 5 to 10 pairs of oval-shaped, toothed leaves up to 12 centimeters long. The inflorescence is a cluster of several daisy-like flower heads with a center of brownish disc florets and a fringe of yellow ray florets 1 to 2 centimeters long. The fruit is a cylindrical achene covered in hairs and with a light brown pappus at one end.[2]

Subspecies[1][2]

References
  1. The Plant List Arnica lanceolata Nutt.
  2. Flora of North America, Clasping arnica, Arnica lanceolata
  3. "Arnica lanceolata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 May 2015.
  4. Biota of North America Program 2014 state-level distribution map
  5. Calflora taxon report, University of California, Arnica lanceolata Nutt. ssp. prima (Maguire) Strother & S.J. Wolf Clasping arnica


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