Portion of the thallus, with the apothecia, a. (Natural size.)
This image is from Peltidea in Pereira's Elements of Materia Medica and Therapeutics, 1854.
Henriette's Herbal Homepage
Welcome to the bark side.
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.