Arnica amplexicaulis

Taxobox
name = "Arnica amplexicaulis"

---

regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Asterales
familia = Asteraceae
tribus = Heliantheae
genus = "Arnica"
species = "A. amplexicaulis"
binomial = "Arnica amplexicaulis"
binomial_authority = Nutt.

"Arnica amplexicaulis" is a species of arnica known by the common name clasping arnica. It is native to western North America from Alaska to California to Wyoming, where it grows in moist areas such as mountain meadows and streambanks. This 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 daisylike 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.

External links

* [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,701,702 Jepson Manual Treatment]
* [http://plants.usda.gov/java/profile?symbol=ARAM2 USDA Plants Profile]
* [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Arnica+amplexicaulis Photo gallery]