Broad-leaf Arnica, Broad-leaved Arnica, Daffodil Leopardbane, Longleaf Arnica, Mountain Arnica, Spearleaf Arnica, Seep Spring Arnica, Spear-leaf Leopardbane
Arnica latifolia
Synonym: Arnica latifolia var. latifolia
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The photo at left shows 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. The photo at right shows mountain arnica beginning to bloom along the upper Lewis River at the base of the terminal moraine of the Adams Glacier, Mt. Adams Wilderness......July 18, 2018.
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 arnicas in bloom along the Shorthorn Trail #12, Mount Adams Wilderness......July 7, 2021.
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Mountain arnica seen along the Round the Mt. Trail #9 just west of the Aiken Lava Flow, Mt. Adams Wilderness........August 13, 2017.
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The photo at left shows a close-up sideview of 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. The photo at right shows mountain arnica in bloom in meadows about one mile upstream from Foggy Flat, Mt. Adams Wilderness......August 27, 2020.
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.
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Mountain arnica still in bloom in moist riparian areas as seen at left along the headwaters of the Lewis River at the base of the terminal moraine of the Adams Glacier, Mt. Adams Wilderness.....August 31, 2019. The photo at right shows mountain arnica in bloom along the Shorthorn Trail, Mt. Adams Wilderness.....July 10, 2020.
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A cluster of mountain arnica as seen at left at Bird
Creek Meadows............September 1 , 1996. The photo at right shows late-blooming mountain arnica along the upper Lewis River near the Pacific Crest Trail #2000, Mt.Admas Wilderness.....October 5, 2020.
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Mountain arnica blooming at left on the toe of the lava flow on the northern edge of TakhTakh Meadows, Gifford Pinchot National Forest.......August 6, 2022. The photo at right shows several late-blooming mountain arnica at about 6800' along the Climber's Trail on the south rim of Hellroaring Canyon, Yakama Nation landsat Bird Creek Meadows, Mount Adams.....September 14, 2022.
Paul Slichter