The photo above shows a close-up of the flower head of foothills arnica as seen from prairie above Wilson Creek, a BLM site several miles south of US Highway 2 in central Washington........June 25, 2006.
Foothills Arnica is an upright perennial to about 50 cm in height. The stems are solitary. It generally has two to three pairs of opposite leaves, which are narrow and long, mostly three to ten times as long as wide. The basal leaves measure 3-12 cm long and 1-4 cm wide and have prominent parallel venation with 3-5 veins (See photo at bottom of page.). The leaves are reduced in size upwards on the stem, and the basal leaves of Arnica fulgens are similar, but has conspicuous tufts of brown, woolly axillary hairs compared to the white or non-existent axillary hairs of Arnica sororia.
The flower heads are sunflower-like, with both ray and disk flowers. The ray and disc flowers are both yellow. There are typically 13 ray flowers, although they can range from 8-23. Individual rays measure 1.5-2.5 cm long. The involucral bracts are broadest at the base, tapering gradually to an acute tip.
Foothills Arnica is found in dry, open places in the foothills and high plains to moderate altitude in the mountains.
Foothills arnica is found from British Colombia and Alberta south to Wyoming, Utah, and California.
A close-up of the mature fruits of foothills arnica as seen on a potted representative of this species found in the webmaster's garden in Gresham, OR........June 17, 2016..
The photo above shows a basal leaf of foothills arnica as seen from Wilson Creek in central Washington.
-Additional photos of foothills arnica as seen in Logan Valley just west of the Big Creek Campground, Malheur National Forest............July 1, 2010.
-Leaf details for foothills arnica as seen in scablands (a moist drainage) between Long Prairie and FS Road 4230-050, Ochoco National Forest........April 30, 2016.
-The photo at left shows a close-up of the flower head of foothills arnica from Big Summit Prairie, Ochoco N.F...........June 23, 1998. The photo at right shows foothills arnica in bloom on vernally moist scablands at the south rim of Umtanum canyon above Umtanum Falls, Yakima County, WA......May 25, 2019.
-The photo at left shows a view of the lowest leaf of foothills arnica as seen from Big Summit Prairie, Ochoco N.F...........June 23, 1998. The photo at right shows foothills arnica as seen atop Lookout Mountain, Ochoco National Forest.........June 15, 2015.