Arnica longifolia (Spearleaf Arnica) is a species of perennial herb in the family Asteraceae. They have a self-supporting growth form. They are native to Canada and The Contiguous United States. They have simple, broad leaves and yellow flowers. Flowers are visited by Hoplitis albifrons argentifrons. Individuals can grow to 0.61 m.
EOL has data for 70 attributes, including: