The flower head and
leaves at midstem of mountain arnica as seen at about 4100' along King Mt. Rd
#200, Tract D Yakama Nation to the southeast of Mt. Adams...........May 28,
2005.
Similar Species:
Mountain Arnica, Broadleaf Arnica: Arnica
latifolia - Leaves larger, usually 1.5-8 cm broad, often noticeably
toothed. The 1-3 flower heads are larger and wider than those of the next
species, with the involucres measuring from 10-18 mm high. Larger plants from
10-60 cm high, found in moist woods, medows, and moist open places in the
mountains, more typically at lower elevations than the next species.
Slender Arnica:
Arnica gracilis (A. latifolia var. gracilis) - Leaves
small, usually less than 2.5 cm wide. The 3-9 narrow heads are small, the
involucre measuring 7-13 mm hgih. Small tufted plants from 10-30 cm high,
found on rocky to cinder slopes that are more exposed, and usually higher
than A latifolia.
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Mountain arnica as seen at left along the Pacific Crest Trail #2000 between Cispus Basin and Cispus Pass, Goat Rocks Wilderness..........August 19, 2020. The image at right shows mountain arnica along the Pacific Crest Trail near the junction with the Cedar Creek Trail #149A, Gifford Pinchot National Forest.......June 23, 2024.
The photo above shows a close-up of the leaves at midstem of
mountain arnica as seen at about 4100' along King Mt. Rd #200, Tract D Yakama
Nation to the southeast of Mt. Adams...........May 28, 2005.
A cluster of mountain arnica as seen at Bird
Creek Meadows............September 1 , 1996.
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