|A. lanceolata subsp. prima
Arnica lanceolata is a North American species of arnica in the sunflower family, known by the common name clasping arnica or lanceleaf arnica. It has a disjunct (discontinuous) distribution in western North America and northeastern North America.
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.
- Arnica lanceolata subsp. lanceolata - Quebec, New Brunswick, Maine, New Hampshire, Vermont, New York
- Arnica lanceolata subsp. prima (Maguire) Strother & S.J.Wolf - Alaska, Yukon, Northwest Territories, Alberta, British Columbia, Washington, Oregon, California, Idaho, Montana, Utah, Wyoming, Nevada
- The Plant List Arnica lanceolata Nutt.
- Flora of North America, Clasping arnica, Arnica lanceolata
- "Arnica lanceolata". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 26 May 2015.
- Biota of North America Program 2014 state-level distribution map
- Calflora taxon report, University of California, Arnica lanceolata Nutt. ssp. prima (Maguire) Strother & S.J. Wolf Clasping arnica
- Go Botany, New England Wildflower Society
- Maine Department of Agriculture, Conservation and Forestry, Maine Natural Areas Program, Arnica lanceolata Nutt., Flower of Hairy Arnica description and ecological information with photos
|This Heliantheae article is a stub. You can help Wikipedia by expanding it.|