Evernia
Evernia prunastri
Evernia prunastri (L.) Ach.
Engl.: oakmoss.
Bot. syn.: Lichen prunastri L.
Practical Herb Cards 2
Distance course
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.