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Family = Asteraceae, Genus = Arnica, Species = longifolia, including synonyms,

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Arnica longifolia   (spear-leaf arnica, seep spring arnica, longleaf arnica, spear-leaf leopardbane)  
(= Arnica longifolia in Flora of the Pacific Northwest)
Densely tufted perennial, often in large patches, from a short rhizome; many sterile, leafy stems; flowering stems leafy, 3-6 dm. high.
Distribution: Southern Alberta south to Washington, Colorado and California.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, at moderate to high elevations in the mountains.
Origin: Native

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Washington Native Plant Society
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