Arnica rydbergii
Arnica rydbergii is a North American species of flowering plant in the family Asteraceae, known by the common name Rydberg's arnica or subalpine arnica or subalpine leopardbane. It is native to western Canada, and the western United States.
Arnica rydbergii is an herb up to 35 cm tall. Flower heads are yellow, with both ray florets and disc florets. It grows in alpine meadows and rocky slopes at high altitudes in mountainous areas.
The species is named for Swedish-American botanist Per Axel Rydberg, 1860–1931.