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Arnica has been used in different forms since the 1500s. It has been said that the German poet and philosopher, Goethe (1749-1832), drank arnica tea to relieve chest pains.

Intraspecific variation in photosynthesis, transpiration, and leaf structure according to natural exposure to sunlight was evaluated for the understory species Arnica cordifolia (Compositae) within ...

Donald R. Young, William K. Smith, Simulation Studies of the Influence of Understory Location on Transpiration and Photosynthesis of Arnica Cordifolia on Clear Days, Ecology, Vol. 63, No. 6 (Dec., ...