Arnica viscosa
{{Short description|Species of flowering plant}}
{{Speciesbox
|image = Arnica viscosa (Oregon, USA).jpg
|genus = Arnica
|species = viscosa
|authority = A.Gray
|synonyms_ref=[http://www.theplantlist.org/tpl1.1/record/gcc-115391 The Plant List Arnica viscosa A.Gray ]
|synonyms =
- Chrysopsis shastensis Jeps.
- Raillardella paniculata Greene
|}}
Arnica viscosa is an uncommon North American species of flowering plant in the family Asteraceae, known by the common name Mount Shasta arnica (not to be confused with the Shasta County arnica, A. venosa).[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066131 Flora of North America Vol. 21 Page 377 Mt. Shasta arnica Arnica viscosa A. Gray]
Distribution
It is native to the Klamath Mountains and nearby southern Cascade Range in northern California (Shasta, Siskiyou and Trinity Counties) and southern Oregon (Josephine, Douglas, Klamath, and Deschutes Counties).[http://bonap.net/MapGallery/County/Arnica%20viscosa.png Biota of North America Program 2014 county distribution map][http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=696 Calflora taxon report, University of California, Mt. Shasta arnica] It grows in subalpine to alpine habitats.
Description
Arnica viscosa is a perennial herb usually producing one or more hairy, glandular stems 20 to 50 centimeters tall. There are five to ten pairs of oblong leaves along the stem each a few centimeters long.[https://www.biodiversitylibrary.org/page/8838154#page/404/mode/1up Gray, Asa 1878. Proceedings of the American Academy of Arts and Sciences 13: 374]
The inflorescence bears many flower heads lined with hairy, glandular phyllaries. The head is discoid, containing only yellow disc florets, and no ray florets.
The fruit is an achene about 5 or 6 millimeters long, not counting its white to brownish pappus.
References
{{Reflist}}
External links
- [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,701,718 Jepson Manual Treatment]
- [http://plants.usda.gov/java/profile?symbol=ARVI6 United States Department of Agriculture Plants Profile]
- [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Arnica+viscosa Calphotos Photo gallery, University of California]
{{Taxonbar|from=Q4794787}}
Category:Flora of the Cascade Range
Category:Flora of the Klamath Mountains
Category:Plants described in 1878
Category:Flora without expected TNC conservation status
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