Infused oils of St. John's wort from above.
In this very dry summer, one oil didn't turn red at all -- until I crushed the herb in a blender. Tapanila, Helsinki, Finland. Processed. 2010-08-16.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.