Fig. 007. Section of thallus of Cetraria islandica.
through an apothecium.
as. Asci, three of which contain ascospores.
gon. Gonidia.
This image is from Cetraria in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
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.