XRydberg's Arnica (Arnica rydbergii)X
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Subalpine Arnica -or- Rydberg's Arnica (Arnica rydbergii), family Asteraceae (Aster/Sunflower)
This perennial herb is one of 30 members in the genus arnica. While some arnica's are known for their medical uses there are none specifically for this species. In general Arnica contains the toxin helenalin, which can be poisonous if large amounts of the plant are eaten, and contact with the plant can also cause skin irritation. If enough of the material is ingested, the toxin helenalin produces severe gastroenteritis, and internal bleeding of the digestive tract - per WIKIPEDIA. The species Arnica montana, native to Europe, has long been used medicinally, but this use has not been substantiated.
Flower -
Plant location: Seen on Cottonwood Pass (Grandby) Colorado on May 27, 2009. Elevation approximately 8700'. Found in the following United States: CO , ID , MT , OR , SD , UT , WA , WY.Plant -
Bloom season: Summer.Foliage -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
Another flower view -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
Additional foliage view -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
Bract macro -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
Stem and node (the position on the stem where leaves or branches originate) - macro view -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
Flower, profile view -
Cottonwood Pass (Grandby) Colorado - May 27, 2009
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Cottonwood Pass (Grandby) Colorado - May 27, 2009
Macro of bract and stem -
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Cottonwood Pass (Grandby) Colorado - May 27, 2009
Disc macro -