About Arnica lessingii (Torr. & A.Gray) Greene
Arnica lessingii (Torr. & A.Gray) Greene, commonly called nodding arnica, is an arnica species belonging to the sunflower family. It is native to regions on both sides of the Bering Strait: in North America, it grows in Alaska, Yukon, British Columbia, and the Northwest Territories; in Russia, it occurs on the Kamchatka Peninsula along Russia's Pacific Coast.