Alex Hyde / Nine-spotted moth (Amata phegea) feeding from a Mountain arnica flower (Arnica montana) Triglav National Park, Julian Alps, Slovenia. July.

Wild Wonders of Europe / Benvie / Mountain arnica (Arnica montana) with Fritillary butterfly (Boloria sp) on flower, Naturpark Kaunergrat, Tirol, Austria, July 2008

Fabrice Cahez / Arnica flower (Arnica montana) Cantal, France, July.

Nick Garbutt / Fritillary butterfly (Melitea varia) feeding on Mountain Arnica (Arnica montana). Nordtirol, Austrian Alps, Austria, July.

Alex Hyde / Heath Fritillary (Melitaea athalia) on Mountain Arnica (Arnica montana). Nordtirol, Austrian Alps. June.

Alex Hyde / Mountain Arnica (Arnica montana) Nordtirol, Austrian Alps. June.

Radomir Jakubowski / Wolf's bane (Arnica montana) in dewy grassland, Vosges Mountains, France, June.

Radomir Jakubowski / Wolf's bane (Arnica montana) Vosges Mountains, France, June.

Fabrice Cahez / Mountain arnica (Arnica montana) close up of flower, Aubrac, Auvergne, France, July.

Michel Poinsignon / Mountain arnica (Arnica montana) open sack showing picked flowers with stems, Honeck Vosges, Mountains France, July 2010.

Michel Poinsignon / Mountain arnica (Arnica montana) open sack showing picked flowers with stems, Honeck Vosges, Mountains France, July 2010.

Michel Poinsignon / Mountain arnica (Arnica montana) bag full of picked flowers, Honeck Vosges, Mountains France, July 2010.